Natural gas power plants focus on using non-renewable energy resources.
Found in subterranean layers of rocks and sediments. Pressure and heat worked together to transform plant and animal debris into crude oil also known as petroleum coal, and natural gas. Our energy supply comes primarily from fossil fuels, with nuclear power and renewables rounding out the whole. These sources mainly come from our nearby star the Sun. Electricity falls into its own category because it is an energy medium and not a primary source.
Non-renewable energy resources are limited because they usually take time to replenish. The advantage of these non-renewable resources is that the power plants that use them can produce more electricity on demand. A non-renewable energy resource is a coal. Non-renewable energy is an energy source that will eventually run out. Most non-renewable energy sources are fossil fuels such as coal gas, and oil.
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Answer:natural gas powerplant
Explanation: because
what is the expected freezing point of a solution containing 85.0g NaCl dissolved in 450g of water
The expected freezing point of the solution is -12.01 °C
What is the freezing point of a substance?The freezing point of a substance is the temperature at which a liquid changes to a solid.
When solutes are dissolved in solvents, they depress the freezing point of the solvent.
The expected freezing point of the solution is calculated using the formula;
ΔT = K * m * iwhere:
ΔT = freezing point depressionK = Freezing point constantm = molality of the solutioni = Van't Hoff factorFor water, K = 1.86 ∘c/m
molality of solution = moles of solute/ mass of water in Kg
moles of NaCl = 85/58.5 = 1.453 moles
mass of water in kg = 450/1000 = 0.45
molality of solution = 1.453 / 0.45
molality of solution = 3.23 molal
i = 2
ΔT = 1.86 × 3.23 × 2
ΔT = 12.01
Freezing point of solution = Freezing point of water - ΔT
Freezing point of solution = 0 - 12.01
Freezing point of solution = -12.01 °C
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The steam reforming of methane occurs
according to the following chemical
equation:
CH2(g) + 2H₂O(g) = CO₂(g) + 4H₂(g)
Use the following equations to solve for the
enthalpy change of steam reforming of
methane:
AH° = -242 kJ/
ΔΗ° = -75 kJ/
H₂(g) + 1/2O₂(g) → H₂O(g)
mol
2H₂(g) + C(s)→ CH₂(g)
mol
C(s) + O₂(g) → CO₂(g)
kJ/mol
ΔΗ° = -394
The enthalpy change of steam reforming of methane is -953 kJ/mol.
What is the enthalpy change of a reaction?The enthalpy change of a reaction is the amount of heat absorbed or evolved when a mole of a substance is formed from its reactants.
The enthalpy change of a reaction may have a positive or negative value.
When the enthalpy change of a reaction has a positive value, the reaction is endothermic, but when the enthalpy change of a reaction has a negative value, the reaction is exothermic.
The enthalpy change of steam reforming of methane is calculated from the equation of the reaction, ΔH°, as given below follows:
Equation of reaction: CH₄ (g) + 2 H₂O (g) ---> CO₂ (g) + 4H₂(g)
The enthalpy change, ΔH°, of the reaction is equal to the sum of the enthalpy of the intermediate reactions.
H₂(g) + 1/2O₂(g) → H₂O(g) :ΔH₁° = -242 kJ/mol
2H₂(g) + C(s)→ CH₄ (g) :ΔΗ₂° = -75 kJ/mol
C(s) + O₂(g) → CO₂(g) :ΔΗ₃° = -394 kJ/mol
ΔH° = 2 × ΔH₁° + ΔΗ₂° + ΔΗ₃°
ΔH° = {2 × (-242) + (-75) + (-394)} kJ/mol
ΔH° = -953 kJ/mol
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Answer : 165 kj/mol
[2(-242 kJ/mol)] + [2(0 kJ/mol)] - [-75 kJ/mol] + [-394 kJ/mol] = 165 kJ/mol
All electromagnetic waves travel at the same speed in a vacuum. However, different kinds of electromagnetic waves have different wavelengths. For example, microwaves have longer wavelengths than visible light. How is it possible for both microwaves and visible light to travel at the same speed in a vacuum if they have different wavelengths?
a
The waves of visible light have less energy than microwaves.
b
Microwaves and visible light have different frequencies.
c
The distance between a point on one wave to the identical point on the next wave is the same for both microwaves and visible light.
d
Microwaves and visible light have the same energy.
The electromagnetic radiation the micro waves and visible light will travel at same speed in vacuum as their energies are the same in vacuum.
What are electromagnetic radiation ?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.
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Aqueous potassium iodate (KIO g) and potassium iodide (KI) react in the presence of dilute hydrochloric acid, as shown below.KI0 3( aq) + 5K|( ag) + 6HCI( ag) -› 31 2(ag) + 6KC|(aq) + 3H 20(1)What mass of iodine (I 2) is formed when 50.0 mL of 0.020 M KIO g solution reacts with an excess of KI and HCl?
The reaction is balanced, so we can continue with the calculations.
We will first find the moles present in the KIO3 solution. For this we are going to use the molarity equation that tells us:
[tex]Molarity=\frac{MolesSolute}{Lsolution}[/tex]We solve the moles of solute from the equation:
[tex]\begin{gathered} MolesSolute=Molarity\times Lsolution \\ MolesSolute=0.020M\times50.0mL\times\frac{1L}{1000mL} \\ MolesSolute=0.001molKIO_3 \end{gathered}[/tex]Now, they tell us that the rest of the reactant is in excess. therefore, the calculations will be made based on the moles of KIO3. By stoichiometry, we have that the I2 to KIO3 ratio is 3/1. So the moles of I2 formed will be:
[tex]\begin{gathered} molI_2=givenmolKIO_3\times\frac{3molI_2}{1molKIO_3} \\ molI_2=0.001molKIO_3\times\frac{3molI_{2}}{1molKIO_{3}}=0.003molI_2 \end{gathered}[/tex]Now, the mass of I2 will be:
[tex]\begin{gathered} gI_2=givenmolI_2\times\frac{MolarMass,gI_2}{1molI_2} \\ gI_2=0.003molI_2\times\frac{253.8gI_2}{1molI_2}=0.76gI_2 \end{gathered}[/tex]Answer: The mass of iodine formed is 0.76 g I2. Second option
Which of the following contains an atom (other than hydrogen) which lacks an octet of valence electrons?
The octet rule tells us that for an atom to be stable it must have 8 electrons in its last energy level. These electrons are called valence electrons. We must see in each compound how the electrons and bonds are distributed. Let's take into account the valence electrons of each element.
These valence electrons coincide with the group to which they belong, that is, if you belong to group 1 they will have 1 valence electron, if they belong to group 7 they will have 7 valence electrons.
We will also make some Lewis diagrams to have greater clarity of how many electrons each element will have. The one that has less than 8, without taking into account the hydrogen will be the option to choose.
The valence electrons of each element is:
H: 2
O: 6
B: 3
N: 5
The Lewis diagrams of each compound will be:
In the image, we see the diagrams of each compound. The purple dots correspond to hydrogen electrons and the yellow ones to the electrons of the other compounds, the electrons are shared. f we count the electrons of the compounds other than hydrogen, we will see that BH3 does not meet the eight electrons
So, the answer will be B) BH3
to correctly use science in any way you must follow certain steps to reach certain things and or one thing leads to another In science
Use science in any way you must follow certain steps to reach certain things are scientific method.
The scientific method included the following process:
Make an observation or ask a questionDo background Research on the topic area.Form a hypothesis or explanation make a prediction on hypothesis Test with experimentAnalyze the dataReport the conclusion.Share your resultThese are the process involved in the scientific method .Scientific method is used in the process of experimentation that helps to explore observations and answers the question.
Science is the application of knowledge and understanding the natural and social world.
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how many moles of c are in 1.22 moles of c6h12o6?
The number of Carbon (C) atoms in 1.22 moles of Glucose = 7.32 × 1023 carbon atoms.
Given 1.22 moles of Glucose (C6H12O6).
The number of Glucose molecules in 1.22 moles of Glucose = 1.22 × 6.02 × 1023.( Since 1 mol contains 6.02 ×1023 particles )= 7.34 × 1023 molecules.
The number of Carbon (C) atoms in a single glucose molecule (C6H12O6) = 6.
The number of Carbon (C) atoms in 1.22 moles of Glucose = Number of C atoms × Number of moles of Glucose × 6.02×1023
= 6 × 1.22 × 6.02×1023
= 7.32 × 1023 carbon atoms.
Six carbon atoms and one aldehyde group make up the simple sugar glucose. The molecular structure of this monosaccharide is C6H12O6. Dextrose is another name for it. Since it has six carbon atoms and an aldehyde group, it is known as aldohexose. It comes in two varieties: ring structure or open-chain. The chemical formula for glucose is C6H12O6, making it a simple sugar. One family of carbohydrates called monosaccharides, of which glucose is the most prevalent
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Which state of matter is the strongest conductor of electricity?
Answer:
The strongest conductors are understood to be all metals. Their conductivity is dependent on their atoms' number of valence electrons. Such electrons are not tightly bound together and are free to pass. Metals have electrons like this in their atoms, which is why they conduct heat and electricity so well.
For this question, the answer was provided and it said that “the slope of the heating curve of the liquid state is less steep, which means it requires more heat to raise the temperature of the substance in the liquid state by 1 C than it does to raise the temperature of the substance in the solid state by 1 C.”I did not understand the answer, what is meant by “less steep” in this scenario?
Answer: The heat capacity of the liquid is greater than the solid for the substance given.
Explanation:
The question requires us to compare the heat capacity of a substance in its liquid and solid state, given a graph of heat gained versus temperature where the phase changes of the substance are indicated.
To solve this problem, we need to keep in mind that heat capacity is defined as the amount of heat necessary to produce a temperature change of one unit, and it is usually given in units of energy per unit of temperature (such as J/K or J/°C). Thus, a greater heat capacity means that more energy will be required to cause the same temperature change.
Looking at the graph provided, we can identify the regions where the substance would be in its liquid, solid and gas state, and also the phase changes:
We can see in the graph that the curve where the substance is a solid "grows faster" compared to the curve for the liquid - it means that the curve for the liquid is "less steep". Consider the following example:
In the image above, Δx for the blue curve is greater than Δx for the green curve, considering the same Δy - therefore, the blue curve is less steep than the green one.
Now, going back to the graph provided in the question, we can say that the curve for the liquid is "less steep" than the solid or, in other words, considering the same temperature change (variation in y), the heat required for the liquid would be greater (variation in x). This means that the heat capacity of the liquid is greater than the solid for the substance given.
What volume of a 0.978 M solution of NaOH must be added to 25.0 mL of 0.583 M HCl to completely neutralize the acid?
The volume of the sodium hydroxide base that we need is 14.9 mL.
What is the volume required?Recall that the reaction between an acid and a base that leads to the formation of salt ad water is what we call a neutralization reaction. It ionically involves the reaction of the hydrogen and the hydroxide ion to form water.
Where CA and CB are the concentrations of the acid and base respectively and VA and VB are the volumes of the avid and base respectively. The reaction is 1:1 as we know.
Hence;
CAVA/CBVB = 1
CAVA = CBVB
VB = CAVA/CB
VB = 0.583 M * 25.0 mL /0.978 M
VB = 14.9 mL
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Refer to instructions. (S)-(-)-Serine:
a. is dextrorotatory
b. rotates plane-polarized light in a counterclockwise direction
c. rotates plane-polarized light in a clockwise direction
d. is racemic
7. Refer to instructions. Draw the enantiomer of (S)-()-serine in a wedge-dash projection.
An amino acid involved in the production of proteins is serine. It is a polar amino acid because it has a -amino group, a carboxyl group, and a side chain made up of a hydroxymethyl group.
A crucial part of plant metabolism, growth, and cell signaling is played by the polar amino acid serine. Serine contributes to the formation of biomolecules like amino acids, nucleotides, phospholipids, and sphingolipids in addition to serving as a protein building component.
Wedge-dash structure refers to the portrayal of an organic compound that shows its 3-D structure. The inside and outward groups are denoted by dash-bond and wedge-bond, respectively.
Typically, a wedge-bond will be used to represent the group on the left side of the Fischer projection and a dash-bond will be used to represent the group on the right side. The H atom will be joined to the dash-bond and the methyl group will be joined to the wedge-bond.
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What is this symbol for the atom or ion that has 26 protons 30 neutrons and 24 electrons?
Answer: Fe+2
Explanation:
You have to take in account of the atomic number, mass number, and net charge:
The atomic number: The number of protons in the nucleus of an atom
Net Charge of atom: Overall charge of atom
The atomic number of Iron is 26.
The atomic mass is 56.
The net charge of an ion of iron is +2 (a cation)
The atomic mass of iron is 56.
All atoms are made up of subatomic particles: protons, and neutrons (part of the nucleus.) Electrons revolve around them, and are negatively charged. Protons are positive, and neutrons are negative.
In this case, an ion of iron has an 26 protons. Then:
Atomic number = number of protons= 26
The atomic number of iron is 26.
On the other hand, the mass number or atomic mass tells us the total number of particles in the nucleus. The mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus:
Mass number = (number of protons) + (number of neutrons)
In this case, an ion of iron has an 26 protons and 30 neutrons. Then:
Mass number = 26 + 30
Mass number= 56
So, the atomic mass of iron is 56.
An ion is an atom or group of atoms with an electrical charge. Ions with a positive charge are called cations, while those with a negative charge are called anions. There is an imbalance between electrons, and protons.
The neutron is an electrically neutral subatomic particle, while the proton has a positive electrical charge. Electrons have a negative electrical charge.
So, the net charge of an atom or body is a function of the number of protons and electrons, and it is the algebraic sum of charges. In this case:
net charge= 26 positives electrical charges + (-24) negative electrical charge
net charge= 26 - 24
net charge= +2
Finally, the net charge of an ion of iron is +2 (a cation)
The Symbol would be Fe+2
You are a chemist working in your laboratory. In your storage closet you have a cabinet that holds only samples of pure elements, no compounds. While looking for a sample of lithium (Li), you notice that the label on one bottle has worn off. The room is at normal temperature. The contents of the bottle are liquid and do not look metallic. What element should you relabel the bottle as?
A. Chlorine (Cl)
B. Bromine (Br)
C. Helium (He)
D. Arsenic (As)
The bottle should relabel as bromine i.e option B
Why bromine is a liquid?
The presence of strong intermolecular interactions prevents bromine from evaporating, Therefore bromine is a liquid.
As it is mentioned in the question, the unidentified element is in a liquid state and is non-metallic. Therefore, it can not be other than bromine due to the following reasons.
• Chlorine and helium both always exist as a gas. So, can not be a liquid
• Arsenic is a metal
Hence, option B is left only and which is correct too.
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3. In the table above, which is NOT a physical
change in size or shape? sc.8.P.9.2
Lemon juice and lime juice are rich sources of citric acid.
Making of lemonade is chemical change.
What is in lemonade mix? Ascorbic Acid (Vitamin C), Natural Flavor, Artificial Color, Soy Lecithin, Tocopherol, Sugar, Fructrate, Citric Acid, Maltodextrin (preserves freshness).If you reduce the sugar content, homemade lemonade is healthier than carbonated lemonade. The ideal option is always unsweetened lemonade,.which keeps the hydration qualities, vitamin C, and antioxidants while reducing the negative effects. which are mostly brought on by too much sugar.To learn more about : Lemonade
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Option B is the correct answer.
All others are physical change except chopping onions, because cutting an onion causes a chemical reaction that produces the distinctive onion aroma.
What is physical change and chemical change?The appearance or form of matter changes during a physical change, but the type of matter in the substance does not. A chemical change, on the other hand, changes the type of matter and creates at least one new substance with new properties.In the given examples,
Hair cutting is a physical change. A physical change occurs when a substance is altered but retains its original properties.Cutting an onion is a chemical change. The more onion cuts there are, the more chemical reactions occur and the onion's flavor becomes stronger.Making lemonade is a physical change by definition, because things dissolve, lemons are cut up, and so on. However, no covalent chemical bonds are formed or broken.Sanding wood is a physical change. However, the wood has not changed to become a new material as a result of sanding; only the surface texture has changed.To learn more about chemical and physical change refer to :
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The first ionization energies of five consecutive elements in the periodic table with atomic numbers Z, Z+1, Z+2, Z+3 and Z+4 are given below. Z is less than 16 and one of these elements is a metal. The ionization energy values are not given in any particular order. Ionization Energies: Energies: 495, 1313, 1681, 2081, 1402 kJ mol-¹
Answer:
Z: 495
Z+1: 1313
Z+2: 1402
Z+3: 1681
Z+4: 2081
Explanation:
The attached shows that ionization energy increases up and to the right. If we have five consecutive elements then that means as we increase the atomic number we are moving to the right and therefore increasing ionization energy.
What do you think all the stuff around you and in the universe itself is made from??
The universe contains practically incalculable numbers of planets, moons, asteroids, comets, and clouds of dust and gas, all of which are whirling around in the expanse of space together with billions of galaxies and trillions of stars.
What Is the Universe Made of?Helium is the second most prevalent element in the universe after hydrogen, and the two together make up almost all ordinary stuff. But only a little portion of the universe—about 5%—is represented by this. Everything else is constructed of materials that are invisible and can only be identified indirectly. About 100 seconds after the Big Bang, the temperature dropped to a still-seething 1 billion degrees Kelvin, during which all of the matter that makes up the known elements in the periodic table, as well as all other objects in the universe, such as black holes, massive stars, and specks of space dust, were created.About 380,000 years later, the universe had cooled to the point that protons and neutrons could combine to make lithium, helium, and the hydrogen isotope deuterium, while free electrons were trapped to create neutral atoms.To learn more about Big bang theory, refer
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which of the following is a possible way to describe the components in the reaction below
The Stoichiometry is the coefficients that is written in front of the molecule or element. The number that is written on the foot of the element is atom. Therefore, option D is correct option
What is stoichiometry?Stoichiometry is a part of chemistry that help us in making relationship between reactant and product from quantitative aspects.
The balanced equations
2Ag(s)+I₂(s)[tex]\rightarrow[/tex]2AgI(s)
Stoichiometry basically give the mole ratio between the reactant and the product
Thus we can say that 2 mole of Ag reacts with 1 mole of I₂ to give two mole of AgI or 2 formula units of AgI. in case of compound, mole is also called formula unit.
Therefore, option D is correct option
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Answer:
B
Explanation:
I got it right
What type of bond would you predict to be formed between elements E and G?
Ionic bonds are formed between a metal and non metal. The bond formed between E having atomic number 19 and G with atomic number 17 is ionic bond.
What is ionic bonding?
Ionic bonds are strong bonds formed between a metal and non metal. Ionic bond is generated by donation of one or more electron from metal to the non metal.
Metals are electropositive and non-metals with high electronegativity are bind by by an electrostatic force of attraction through bonded electrons where the bonded electrons are pulled towards the electronegative atom.
The element G with atomic number 17 is chlorine. Which is 17th group element and is highly electronegative. Chlorine have a valency of one and by accepting one electron from a metal it completes its octet.
Element E with atomic number 19 is potassium or K. Potassium is an electropositive element with a valency of one and it donates one electron to an electronegative atom to become stable.
Therefore, the bond formed between potassium and chlorine is ionic bond formed by donation of an electron from K to Cl making the compound KCl.
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Your question is incomplete. But most probably your complete question was:
There are three elements E , F , G with atomic number 19 , 8 and 17 respectively. What type of bond would you predict to be formed between elements E and G?
2 Points
You are a chemist working in your laboratory. In your storage closet you have a cabinet that holds only samples of pure elements, no compounds. While looking for a sample of lithium (Li), you notice that the label on one bottle has worn off. The room is at normal temperature. The contents of the bottle are liquid and do not look metallic. What element should you relabel the bottle as?
A. Chlorine (Cl)
B. Bromine (Br)
C. Helium (He)
D. Arsenic (As)
Bottle should be labelled as Bromine.
Only two elements are liquid at room temperature mercury and Bromine . Helium and chlorine, arsenic are gases.
What are chemical elements ?A chemical element is a species of atom with a certain number of protons in its nucleus, including a pure substance consisting only of that species. Unlike chemical compounds, chemical elements cannot be broken down into simpler substances by any chemical reaction. The number of protons in the nucleus is a defining characteristic of an element and is called its atomic number (denoted by the symbol Z) - all atoms with the same atomic number are atoms of the same element.
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Label each of the following compounds as covalent, ionic, or acid to indicate which nomenclature rules you would need to use.
NaBr
Calcium acetate
Diphosphorous pentaxide
hydroselenic acid
titanium sulfate
sulfur dioxide
CuOH
Hydrophosphoric acid
HF
CO
[Choose]
[Choose]
[Choose]
[Choose]
[Choose]
[Choose]
[Choose]
[Choose]
[Choose]
[Choose]
The answer is follows:
NaBr - sodium bromide
calcium acetate - Ca(C2H3O2)2
sulfur dioxide - SO2
CuOH - copper (I) hydroxide
Hydro phosphoric acid - H3P
HF - hydrofluoric acid
What is Calcium acetate?Calcium acetate is used to treat hyperphosphatemia (excess phosphate in the blood) in dialysis patients with end-stage kidney disease. Calcium acetate works by binding with the phosphate in food, causing it to be eliminated from the body without being absorbed. The calcium salt of acetic acid, calcium acetate exists as a chemical compound. Ca(C2H3O2)2 stands as the formula for it. Calcium acetate is the common name, while calcium ethanoate is the scientific name. Acetate of lime is an older name. Because the anhydrous form is very hygroscopic, the monohydrate is the most common form.Calcium acetate is a calcium supplement that is used to control the level of phosphate in the blood in dialysis patients with severe kidney disease. Calcium acetate is marketed under the brand names Eliphos, PhosLo, Phoslyra, and Calphron.To learn more about Calcium acetate, refer to:
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Convert the following volumes of gas into volumes at s.t.p: a) 30 cm3 at 261 K and 77 kPa [2] b) 450 cm3 at 303 K and 102.7 kPa [2] c) 50 cm3 at 620 K and 24.312 x 105Pa [2]
Considering the ideal gas law, the volumes of gas in STP will be:
a) 23.846 cm³.
b) 410.95 cm³.
c) 528,256.7272 cm³.
STP conditionsThe STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere (101.325 kPa) and temperature at 0°C are used and are reference values for gases.
Ideal gas lawAn ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that occupies.T is its temperature.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances.n is the number of moles of the gas.The number of moles can be calculated as:
n= (P×V )÷ (R×T)
Analyzing an initial situation 1 and a final situation 2, considering that the number of moles in both states is the same and that the value of R is constant (and therefore it is possible to omit it), it is fulfilled:
n₁= n₂
(P₁×V₁)÷ T₁= (P₂×V₂)÷ T₂
Exercise a)In this case, you know:
P₁= 77 kPaV₁= 30 cm³T₁= 261 KP₂= 101.325 kPaV₂= ?T₂= 0°C= 273 °KReplacing in the Idea Gas Law:
(77 kPa×30 cm³)÷ 261 K= (101.325 kPa×V₂)÷ 273 K
Solving:
[(77 kPa×30 cm³)÷ 261 K] × (273 K÷ 101.325 kPa)= V₂
23.846 cm³= V₂
The volume will be 23.846 cm³.
Exercise b)In this case, you know:
P₁= 102.7 kPaV₁= 450 cm³T₁= 303 KP₂= 101.325 kPaV₂= ?T₂= 0°C= 273 °KReplacing in the Idea Gas Law:
(102.7 kPa×450 cm³)÷ 303 K= (101.325 kPa×V₂)÷ 273 K
Solving:
[(102.7 kPa×450 cm³)÷ 303 K] × (273 K÷ 101.325 kPa)= V₂
410.95 cm³= V₂
The volume will be 410.95 cm³.
Exercise c)In this case, you know:
P₁= 24.312×10⁵ kPaV₁= 50 cm³T₁= 620 KP₂= 101.325 kPaV₂= ?T₂= 0°C= 273 °KReplacing in the Idea Gas Law:
(24.312×10⁵ kPa×50 cm³)÷ 620 K= (101.325 kPa×V₂)÷ 273 K
Solving:
[(24.312×10⁵ kPa×50 cm³)÷ 620 K] × (273 K÷ 101.325 kPa)= V₂
528,256.7272 cm³= V₂
The volume will be 528,256.7272 cm³.
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what information is necessary to review in order to be considered familiar with the safety data sheet (sds) of a substance?
Personal protection and first aid recommendations Identification and description of substance Hazard warnings Handling, storage, and reactivity information in safety data sheet (sds).
A Safety Data Sheet is a thorough informational document created by the maker or importer of a hazardous substance (formerly known as a Material Safety Data Sheet). It outlines the product's chemical and physical characteristics. A Safety Data Sheet (SDS), also known as a Material Safety Data Sheet (MSDS), is a document that outlines the risks associated with working with chemicals and the precautions that should be taken to guarantee safety. SDSs are a key resource for details on chemical handling and dangers. SDSs must be kept in a position that is easily accessible to all employees throughout working hours (not behind a locked door or on a password-protected device to which they do not have the password). SDSs have to be kept nearby the work area.
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22.9 mL of an unknown acid was neutralized by mixing it with 50.3 mL of NaOH in an aqueous solution. The final temperature of the solution was 35.2 °C. The initial temperature of the acid and base was 22.0 °C. Assuming that the density of the solution is 1.00 g/mL and the specific heat is 4.184 J/g°C, what is the heat of neutralization reaction?
When 22.9 mL of an unknown acid is neutralized by mixing it with 50.3 mL of sodium hydroxide in an aqueous solution. Then the heat of neutralization of reaction comes out to be -4043 joules
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.
Mathematically,
Enthalpy=mass of solution×specific heat capacity of solution×Change in temperature.
Total volume=22.9 ml+50.3 ml== 73.2 ml
mass of solution = density× volume
=73.2 ml×1g/ml
= 73. 2gm
enthalpy= 73. 2gm× 4.184 ×(35.2-22.0)
= 4043 joules
heat of neutralization reaction=-enthalpy
=-4043 joules
Thus the heat of neutralization reaction is -4043 joules
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In the chemistry lab, a student makes a potassium hydroxide (KOH) solution by adding 40 grams of KOH to 500 mL of water. To check for understanding of solutions, the teacher asks the student to answer the following questions about the solution they have prepared. (Answer each question)Which substance is the solvent in your solution?Which substance is the solute in your solution?Calculate the molarity of your solution (show your work).The next step in the lab procedure is to dilute the concentration to 1.0 M. What volume of solvent should be added to the solution to dilute it to the proper 1.0 M concentration? (Show your work).
Since KOH dissolves in water so KOH is solute while water is solvent.
[tex]Molarity\text{ = }\frac{moles\text{ of solute}}{volume\text{ of solution in ml}}\text{ * 1000}[/tex]Now, we need to calculate moles of solute (KOH)
[tex]Moles\text{ of KOH =}\frac{given\text{ mass of KOH}}{molar\text{ mass of KOH}}[/tex][tex]=\text{ }\frac{40}{56}=0.714[/tex][tex]So,\text{ Molarity = }\frac{0.714}{500}*1000=\text{ 1.428 mol/L}[/tex]Now, we need to dilute the solution, so we will use molarity equation for dilution which is M1V1 = M2V2
Here, M1= 1.428 M; V1= 40 ml; M2 = 1 M; we need to find V2
[tex]1.428\text{ * 40 = 1 * V2}[/tex]Therefore, V2 = 57.12 mlIf 3.3 moles of nitrogen gas occupies 2.5 L at an initial temperature of-50 degrees Celsius what is the pressure?
The pressure of nitrogen gas at initial temperature of-50 degrees Celsius is 35.004 atm.
How to solve given problem?Using Ideal gas equation PV = nRT,
Given:
P = ?
V = 2.5 L
n = 3.3 mol
R = 0.0821
T = (273 + 50) = 323 K
We can calculate the pressure, by putting the given values
P = 3.3 (0.0821) (323)/2.5
= 35.004 atm
Hence,
The pressure of nitrogen gas is 35.004 atm
What is the purpose of nitrogen gas and is it dangerous to people?• The chemical element with the atomic number 7 and the symbol N is nitrogen. The lightest nonmetal in group 15 of the periodic table is nitrogen. During the sample preparation phase of chemical analysis, nitrogen is frequently utilized. It is used to concentrate and condense liquid sample volumes. Additionally crucial to the chemical sector is nitrogen. It is used to make explosives, nylon, nitric acid, fertilizers, and colors.
• Nitrogen exposure is hazardous because it can displace oxygen and induce asphyxia. In areas with low oxygen levels, only self-contained breathing apparatus that have been authorized by NIOSH and have a full facepiece should be utilized.
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Patient added a 17-g measured dose of polyethylene glycol 3350 (MIRALAX) to 180 mL of water to use as a laxative. If the volume of the resultant mixture was 195.6 mL, calculate the apparent density of polyethylene glycol 3350 and the specific gravity of the mixture
The density of a Substance is the ratio of the mass of that substance to its volume.
The apparent density of ethylene glycol 3350 = mass/Volume
the volume of polyethylene glycol = volume mixture -the volume of water
= 195.6 - 180
15.6 mL =
Apparent density of polyethylene glycol 3350 = 179/15.6 mL
1.099/m2
Now Density of water. 1.008/ml
Mass of water = Density X volume. 180g
=1.00 X 180 = 180g
Mass of solution = mass substance + mass of water
(17+180)g
=197g
Quantity mixture = mass of mixture/Volume
= 197g/195.6 mL
the specific gravity of mixture = density of mixture/density of water
1.01g/mL/1.00g/ml
The specific gravity of the mixture = 1.01.
Polyethylene glycol 3350 is used to treat occasional constipation. Polyethylene glycol 3350 belongs to a class of drugs called osmotic laxatives. It works by retaining water with the stool. This increases the frequency of bowel movements, softens the stool, and makes it easier to pass. This drug belongs to a class of drugs called osmotic laxatives. It works by increasing the amount of water in the intestinal tract. Polyethylene glycol 3350 is commercially available under the brand name MiraLax.
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I know this question is not related to homework or anything school-related, but bare with me.
I like this girl, but I don't know her name yet, but I think I know her well. How do I get her to talk to me?
Across the periodic table, atomic radius continues to decrease through Group 17. How does this fact help explain why the metals in Group 3 through 13 are less reactive than the metals in Group 1 and 2
44 is what percent of 132?
33.33
Explanations:Let the required percentage value be "x".
44 is what percent of 132 is expressed as:
[tex]44=x\%\text{ of 132}[/tex]Simplify the equation to geet the values of "x"
[tex]\begin{gathered} 44=\frac{x}{100}\times132 \\ 44=0.01x\times132 \\ 44=1.32x \end{gathered}[/tex]Divide both sides by 0.32 to have:
[tex]\begin{gathered} 1.32x=44 \\ \frac{\cancel{1.32}x}{\cancel{1.32}}=\frac{44}{1.32} \\ x=\frac{44}{1.32} \\ x\approx33.33 \end{gathered}[/tex]I need help with this chemistry equation
The concentration of ions in the solution is (1) ammonium ion 0.805 M and (2) phosphate ion = 0.268 M.
Concentration is the abundance of a constituent divided with the aid of the entire extent of a combination. numerous types of mathematical descriptions can be distinguished: mass concentration, molar concentration, range concentration, and quantity concentration. awareness is a very not unusual concept utilized in chemistry and related fields. it's by far the measure of how lots of a given substance there is mixed with every other substance.
Calculation:-
mass of ammonium phosphate = 10 g
The molecular mass of (NH₄)₃PO₄ = 149
moles = mass/molar mass
= 10/149
= 0.067 moles
concentration of ammonium ion = 3 × 0.067 moles
= 0.201 M
concentration = number of moles / volume of solution
= 0.067 moles / 250 ml × 1000
= 0.268 M
concentration of ammonium ion = 3 × 0.268 M
= 0.805 M
concentration of phosphate ion = 0.268 M
The concentration of a substance is the amount of solute found in a given quantity of answers. Concentrations are generally expressed in terms of molarity, described as the number of moles of solute in 1 L of the solution.
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