From the stoichiometry of the reaction, the volume of the steam produced is 82.9 L
What is combustion?The term combustion is the term that is used to describe the kind of reaction that occurs when a substance is being burnt in oxygen. It is an oxidation reaction and the octane is burnt to produce carbon dioxide and steam.
We can try to write down the equation of the reaction as follows;
2C8H18(g) + 25O2(g) ------> 16CO2(g) + 18H2O(g)
Now 1 mole of octane gas occupies 22.4 L
x moles of octane gas occupies 9.1 L
x = 9.1 L * 1 mole /22.4 L
x = 0.41 moles
Now;
2 mole of octane gas produces 18 moles of steam
0.41 moles of octane gas produces 0.41 moles * 18 moles/2 mole
= 3.7 moles
1 mole of steam occupies 22.4 L
3.7 moles of steam occupies 3.7 moles * 22.4 L/1 mole
= 82.9 L
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4. The positive Biuret test indicates the presence of ....... bond in proteins.
The positive Biuret test indicates the presence of Peptide bond in proteins.
How to do Biuret test for proteins?
Follow these simple steps if you want to know practically:
Step 1: Take a 3 clean and dry test tubes.
Step 2: Add 1/2 ml of test solution to one test tube, albumin for another, and distilled water to third test tube.
Step 3: Add 3-4 drops of Biuret reagent to each test tube.
Step 4: Shake wee and let it be for 4-5 minutes.
Step 5: Observe the colour changes.
Peptide bonds are (C - N ) bonds present in proteins. The Biuret reagent colour is Pale blue and when you test for protein, if the solution contain protein, when you add the Biuret reagent it will turns to Purple. If there is no protein then the colour remains same.
The Biuret reagent is made up of Hydrated copper sulfate, sodium hydroxide, and Rochelle salt (sodium-potassium tartrate).
Peptide bond is also referred to as Amide bonds, it is formed between the Nitrogen atom of one amino acid and the Carbonyl carbon of second amino acid.
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The theory of what an atom looks like has evolved over time. From the ancient Greeks, to Dalton, to Rutherford—no idea was exactly the same. However, as more information is gathered, new ideas can build on the old. Sometimes new ideas can completely replace the old ones. Even today, there may be new advances that have changed our understanding of the atom that are not reflected in this course.
Answer one of the following prompts to begin your discussion:
You claim that the atomic model should not be continually changed. What reasoning would you give someone to help them understand your claim?
You claim that a new atomic model should always build on an old one. What reasoning would you give someone to help them understand your claim?
You claim that a new atomic model should completely replace an old one. What reasoning would you give someone to help them understand your claim?
You claim that the continuous evolution of the atomic model is beneficial, but you think it should be a mix of the old and the new. What reasoning would you give someone to help them understand your claim?
To being my discussion, I claim that a new atomic model should always build on an old one with the following reasons of mine. That is option B.
What is an atomic model?An atomic model is a model that describes how the interior of an atom looks like. This first atomic model was developed by William Thomson.
To start my discussion, I claim that a new atomic model should always build on an old one with the following reasons of mine:
The modern scientists exploited the ideas of the ancient scientists to arrive at a better atomic model.This method is proven the the works of Bohr in the Bohr atomic model which relied on quantum mechanics, built upon the Rutherford model to explain the orbits of electrons.Learn more about atoms here:
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Identify the correct statement regarding the strength of chemical bonds.
A) Strong bonds occur with high temperature and weak bonds with low temperature.
B) If the bond energy between atoms is very weak then the bond between the atoms is strong.
C) Strong bonds from with large atoms and weak bonds with small atoms.
D) If the bond energy between atoms is very high the the bond between the atoms is strong.
If the bond energy between atoms is very high the the bond between the atoms is strong.
What are chemical bonds?Chemical bonds are formed wen two atoms are combined together. The chemical bonds are responsible for holding the atoms together. These chemical bonds could be ionic or covalent in nature. Coordinate bonds have hybrid behavior between ionic and covalent bond types.
We know that the bond energy refers to the energy that must be supplied in order to break the bonds. A high bond energy implies that it takes a whole lot of energy to break the bond. If it takes a lot of energy to break the bond, then the bond must be a strong bond which holds the two atoms together in the compound. Hence, if the bond energy between atoms is very high the the bond between the atoms is strong.
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A 83.5 g sample of a nonelectrolyte is dissolved in 291.7 g of water.
The solution is determined to have a boiling point of 102.3 °C. What is
the molar mass of the compound? (Kb for water is 0.510 °C/m).
The molar mass of the compound is = 1.42g/ mol
Calculation of compound molar mass∆Tb = kB × molarity
∆Tb = 102.3°C
Kb = 0.510 °C/m
Molarity= electrolyte mass × water solubility/ Mw× mass of water.
That is,
102.3°C= 0.51× 83.5×1000/Mw × 291.7
Make Mw the subject of formula,
Therefore,
Mw = 0.51 × 83.5×1000/ 102.3 × 291.7
Mw= 42,585/29,840.91
Mw= 1.42g/mol
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What is Ką for H3PO4(aq) = H(aq) + H₂PO4 (aq)?
OA. K₂ [H₂PO4][H*][H₂PO4]
=
OB. K₂ =
O C. K₂ =
O D. Ka
=
[H₂PO4]
[H*][H₂PO4]
[H*][H₂PO4]
[H₂PO4]
[H3PO4]
[H+][H₂PO4]
Answer:
C.) [tex]K_a = \frac{[H^+][H_2PO_4^-]}{[H_3PO_4]}[/tex]
Explanation:
The general structure for a Ka expression is:
[tex]K_a = \frac{[H^+][A^-]}{[HA]}[/tex]
In this expression,
-----> Ka = equilibrium constant
-----> [A⁻] = base
-----> [HA] = acid
The products are in the numerator and the reactants are in the denominator. In this case, H₃PO₄ serves as an acid and H₂PO₄⁻ serves as a base.
As such, the equilibrium expression is:
[tex]K_a = \frac{[H^+][H_2PO_4^-]}{[H_3PO_4]}[/tex]
According to chemical equilibrium, the Ka for the given chemical equation is Ka=[H⁺][H₂PO₄⁻]/[H₃PO₄].
What is chemical equilibrium?Chemical equilibrium is defined as the condition which arises during the course of a reversible chemical reaction with no net change in amount of reactants and products.A reversible chemical reaction is the one wherein the products as soon as they are formed react together to produce back the reactants.
At equilibrium, the two opposing reactions which take place take place at equal rates and there is no net change in amount of the substances which are involved in the chemical reaction.At equilibrium, the reaction is considered to be complete . Conditions which are required for equilibrium are given by quantitative formulation.
Factors which affect chemical equilibrium are change in concentration , change in pressure and temperature and presence of catalyst.
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12.2 g of N₂ gas at 1132 torr and 91°C has a volume of
Answer:
8.73 L
Explanation:
First, you need to convert grams to moles using the molar mass.
Molar Mass (N₂): 2(14.009 g/mol)
Molar Mass (N₂): 28.018 g/mol
12.2 grams N₂ 1 mole
---------------------- x ------------------------ = 0.435 moles N₂
28.018 grams
To find the volume, you need to use the Ideal Gas Law:
PV = nRT
In this equation,
-----> P = pressure (torr)
-----> V = volume (L)
-----> n = moles
-----> R = Ideal Gas constant (62.36 torr*L/mol*K)
-----> T = temperature (K)
After converting the temperature from Celsius to Kelvin, you can plug the given values into the equation.
P = 1132 torr R = 62.36 torr*L/mol*K
V = ? L T = 91 °C + 273.15 = 364.15 K
n = 0.435 moles
PV = nRT
(1132 torr)V = (0.435 moles)(62.36 torr*L/mol*K)(364.15 K)
(1132 torr)V = 9888.015
V = 8.73 L
given the a+b=c what is the reaction given
The generic reaction a + b = c, represents a synthesis or combination reaction, which is a kind of chemical reaction.
What is a synthesis reaction?A synthesis, or combination reaction, is a kind of reaction in which two substances combine to form a bigger molecule.
The generic reaction is:
a + b = c
Some common synthesis reactions are:
Two elements combine to form a compound.Fe + S = FeS
One element and one compound combine to form a compound.O₂ + 2 SO₂ = 2 SO₃
Two compounds combine to form another compound.CaO + CO₂ = CaCO₃
In all the examples above, we can verify that the substances (elements or compounds) combine with each other to form another substance (product).
The generic reaction a + b = c, represents a synthesis or combination reaction, which is a kind of chemical reaction.
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Prform the following operation and express the answer in scientific notation 6.0 x 10^3-2.310^3
The value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.
What is scientific notation?Scientific notation is a way to write very large or very small numbers so that they are easier to read and work with.
You express a number as the product of a number greater than or equal to 1 but less than 10 and an integral power of 10 .
Why it is used?There are two reasons to use scientific notation.
The first is to reveal honest uncertainty in experimental measurements. The second is to express very large or very small numbers so they are easier to read.Given,
= 6.0 x 10^3- 2.3 × 10^3
= (6.0 - 2.3) × 10^3
= 3.7 × 10^3
Thus, we find that the value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.
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What is the correct iupac name of CH3-CH2-CH2CHO ?
the correct IUPAC name of the compound is 1-Butanal.
What are IUPAC names?It is a system of naming organic compounds based on the longest carbon-to-carbon single bonds. It does not matter whether these longest chains are continuous or in a ring.
Thus, when the compound with the chemical formula, CH3-CH2-CH2CHO is considered. The longest carbon-to-carbon chain is 4. The 1st carbon carries a functional group known as an aldehyde.
Aldehydes are equipped with the carbonyl group and have the general formula R−CH=O. They are also sometimes referred to as formyl.
Aldehydes are named after their parent alkane chains with a slight modification. The 'e' is replaced with 'al'
The aldehyde in this case has four carbons. This means that the parent alkane is Butane. Therefore, the name of the compound will be 1-Butanal.
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URGENT
A chemical equilibrium between gaseous reactants and products is shown.
N2(g) + 3H2(g) ⇌ 2NH3(g)
How will the reaction be affected if the pressure on the system is increased?
It will shift toward the reactant side as there is lower pressure on the reactant side.
It will shift toward the product side as there is higher pressure on the product side.
It will shift toward the reactant side as there are a greater number of moles of gas on the reactant side.
It will shift toward the product side as there are a fewer number of moles of gas on the product side.
Answer:
Explanation:
Discussion
When Pressure increases equilibrium shifts to the side with the smallest number of moles. But which side is that?
N2(g) + 3H2(g) ⇌ 2NH3(g)
The left side has 1 mol of nitrogen (N2) and 3 moles of Hydrogen = 4 mols
on the left side.
The right side has 2 mols of NH3 = 2 mols on the right.
Conclusion: You tell the number of mols by the Balance numbers to the left of each chemical in an equation.
Since the left side N2 + 3H2 = 4 mols, the equilibrium does NOT shift left.
2NH3 is only two mols.
The equilibrium shifts Right
Answer
D
How many grams of water will be produced if you start with 4.0 grams of hydrogen and an excess of oxygen given the following balanced chemical equation?
2H2 + O2 → 2H2O
Group of answer choices
A. 32.0 grams
B. 36.0 grams
C. 54.0 grams
D. 18.0 grams
Taking into account the reaction stoichiometry, 36 grams of water (option B) will be produced if you start with 4.0 grams of hydrogen and an excess of oxygen.
Reaction stoichiometryIn first place, the balanced reaction is:
2 H₂+ O₂ → 2 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
H₂: 2 moles O₂: 1 moleH₂O: 2 molesThe molar mass of the compounds is:
H₂: 2 g/moleO₂: 32 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
H₂: 2 mole× 2 g/mole= 4 gramsO₂: 1 mole× 32 g/mole= 32 gramsH₂O: 2 moles× 18 g/mole= 36 gramsMass of H₂O formedYou can see that by reaction stoichiometry 4 grams of H₂ form 36 grams of H₂O.
SummaryIn summary, 36 grams of water (option B) will be produced if you start with 4.0 grams of hydrogen and an excess of oxygen.
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A 1.239 g sample contains only vitamin C (C6H8O6) and sucralose (C12H19Cl3O8). When the sample is dissolved in water to a total volume of 46.1 mL, the osmotic pressure of the solution is 3.06 atm at 293 K. What is the mass percent of vitamin C and sucralose in the sample?
The mass percentage of vitamin C is 68.3%and the mass percentage of sucralose is 31.7%.
Osmotic pressure (π) = iCRT
Where,
Π= Osmotic pressure = 3.06 atm
I = Van't hoff factor = 1(molecular solution)
C = concentration (in mol/L)
R = gas constant = 0.082 Latm/Kmol
T = temperature = 293K
C can also be written as
Number of moles/ Volume = n/V
Given, volume = 46.1 mL
It can be written as
Π= nRT/V
n= πV/RT
n = 3.06× 0.0461/(0.082×293)
n = 0.0058moles
Mass of vitamin C = a
Mass of sucralose = b
Mass of given sample = 1.239g
Hence,
a + b = 1.239
b = 1.239-a
Molar mass of vitamin C = 176g/mol
Molar mass of sucralose = 398g/mol
Total number of moles = number of moles of vitamin C + number of moles of sucralose
0.0058= a/176 + (1.239-a) /398
0.0058× 176× 398 = 398a + (1.239-a) 176
406.27 = 398a + 218.064 -176a
188.206 = 222a
a = 0.847g
And b = 0.392g
Mass percent of vitamin C = (0.847/1.239) × 100
= 68.3%
Mass percent of sucralose = 100- 78.5
= 31.7%
Thus, we find that the mass percentage of vitamin C is 68.3 %and the mass percentage of sucralose is 31.7%.
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10. A 10.9ml sample of gas is collected over water at 21.0 C and 1.89 atm , what volume would you have at 25.0 C and 2.25 atm
Considering the combined law equation, you would have a volume of 9.28 mL at 25.0 C and 2.25 atm.
Boyle's lawBoyle's law establishes the relationship between the pressure and the volume of a gas when the temperature is constant.
This law says that volume is inversely proportional to pressure: if pressure increases, volume decreases, while if pressure decreases, volume increases.
Mathematically, Boyle's law states that the multiplication of pressure by volume is constant:
P×V= k
Charles's lawCharles's law establishes the relationship between the temperature and the volume of a gas when the pressure is constant.
This law says that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases, while if the temperature of the gas decreases, the volume decreases.
Mathematically, Charles' law states that the ratio of volume to temperature is constant:
[tex]\frac{V}{T}=k[/tex]
Gay-Lussac's lawGay-Lussac's law establishes the relationship between the temperature and pressure of a gas when the volume is constant.
This law says that the pressure of the gas is directly proportional to its temperature: if the temperature increases, the pressure increases, while if the temperature of the gas decreases, the pressure decreases.
Mathematically, Gay-Lussac's law states that the ratio of pressure to temperature is constant:
[tex]\frac{P}{T}=k[/tex]
Combined law equationCombined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:
[tex]\frac{PV}{T}=k[/tex]
Considering an initial state 1 and a final state 2, the following holds:
[tex]\frac{P1V1}{T1}=\frac{P2V2}{T2}[/tex]
Volume in this caseIn this case, you know:
P1= 1.89 atmV1= 10.9 mLT1= 21 C= 294 K (being 0 C= 273 K)P2= 2.25 atmV2= ?T2= 25 C= 298 KReplacing in the combined law equation:
[tex]\frac{1.89 atmx10.9 mL}{294 K}=\frac{2.25 atmxV2}{298 K}[/tex]
Solving:
[tex]\frac{1.89 atmx10.9 mL}{294 K}\frac{298K}{2.25 atm} =V2[/tex]
9.28 mL= V2
Finally, you would have a volume of 9.28 mL at 25.0 C and 2.25 atm.
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How many neutrons does an atom of Uranium 240?
Group of answer choices
A. 148
B. 146
C. 92
D. 240
Answer:
Number of neutrons is equal to 148.
Classify the following aqueous solutions as: strong acid, weak acid, neutral, weak base, or strong base.
vinegar pH 3.2
battery acid pH 0.5
shampoo pH 7.0
ammonia pH 11.1
Vinegar pH 3.2: Weak acid
Battery acid pH 0.5: Strong acid
Shampoo pH 7.0: Neutral
Ammonia pH 11.1 Strong base
Anyone know this please and thank you
Answer:
The correct answer is a hypothesis.
If the value for ΔS is postive, and the value for ΔH is negative, thr reaction will be
Group of answer choices
A. spontaneous at high temperatures.
B. spontaneous at all temperatures.
C. spontaneous at low temperatures.
D. Δnot spontaneous at all temperatures.
It follows that the reaction is spontaneous at high temperatures Option A.
What is ΔS ?The term ΔS is referred to as the change in the entropy of the system. Now recall that entropy is defined as the degree of disorderliness in a system. If a system is highly disorderly then it means that it has a high entropy. Also, ΔH has to do with the heat change that accompanies a reaction.
We know that both the entropy and the heat change can both either be positive or negative. Now we know that the equation ΔG = ΔH - TΔS can be used to ascertain whether or not a reaction will be spontaneous. If the result is negative, then the reaction will be spontaneous.
As such, when then it follows that the reaction is spontaneous at high temperatures Option A.
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If an electron falls from the n = 2 to the n = 1 energy levels in a Hydrogen atom what wavelength of light is emitted?
Group of answer choices
A. 122 nm
B. 1024 nm
C. 97 nm
D. 103 nm
A. The wavelength of light that is emitted is 122 nm.
What is wavelength?
Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.
Wavelength of light is emittedWhen an electron falls from the n = 2 to the n = 1 energy levels in a Hydrogen atom, the wavelength of light is emitted is calculated as follows;
¹/λ = R(1/n₁² - 1/n₂²)
¹/λ = 109677(1/1 - 1/2²)
¹/λ = 109677(1 - ¹/₄)
¹/λ = 82,257.25
λ = 1/8,225.25
λ = 1.22 x 10⁻⁵ cm
λ = 1.22 x 10⁻⁷ m
λ = 122 nm
Thus, the wavelength of light that is emitted is 122 nm.
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Hydrochloric Acid would best be described as a:
Group of answer choices
A. Arrhenius, BrØnsted-Lowrey and Lewis Base
B. Arrhenius, BrØnsted-Lowrey and Lewis Acid
C. BrØnsted-Lowrey and Lewis Acid
D. Arrhenius and Lewis Acid
Hydrochloric Acid would best be described as an Arrhenius and BrØnsted-Lowrey acid.
Is Hydrochloric Acid considered a Brønsted-Lowry acid?
Hydrochloric Acid HCl(g) is the proton donor and therefore a Brønsted-Lowry acid.
Is Hydrochloric Acid considered an Arrhenius acid?According to Arrhenius theory, hydrochloric acid is an acid which gives hydrogen ions in water but according to Bronsted-Lowry theory, hydrochloric acid is an acid because it donates a proton to the water molecule.
Is Hydrochloric Acid considered a Lewis acid?
Hydrochloric acid (HCl) cannot be classified as a Lewis acid since it cannot accept an electron pair.
Thus, hydrochloric Acid would best be described as an Arrhenius and BrØnsted-Lowrey acid.
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An ion of a single pure element always has an oxication number of
A. magnitude equal to its atomic number
OB. 1
OC.0
OD. None of these
Answer:
C. zero 0
Explanation:
single elements will always possess an oxication number of zero
Is HF the most polar among covalent bonds?
Answer:
No.
Explanation:
HI is more polar than HF
What is the maximum amount of methanol (CH3OH), in mol, that could be formed when 2 mol of carbon dioxide and 3 mol of hydrogen are placed in a
container and react according to the equation: CO2 + 3 H2 → CH3OH + H2O
a) 1
b) 2
C) 3
d) 5
Answer:
a) 1
Explanation:
Unfortunately, we are not given the limiting reagent. The limiting reagent is the reactant which is completely used up first. We can identify it by converting both reactants into the product. The reactant which produces the smallest amount of product is the limiting reagent.
You can convert the moles of CO₂/H₂ to moles CH₃OH using the mole-to-mole ratio. This ratio is made up the balanced equation coefficients of the relevant substances.
1 CO₂ + 3 H₂ -----> 1 CH₃OH + H₂O
2 moles CO₂ 1 moles CH₃OH
--------------------- x ---------------------------- = 2 moles CH₃OH
1 mole CO₂
3 moles H₂ 1 moles CH₃OH
------------------- x --------------------------- = 1 mole CH₃OH
3 moles H₂
Because H₂ produces the smallest amount of CH₃OH, it is the limiting reagent. This means that all the H₂ is used up before CO₂ runs out. Therefore, the actual amount of CH₃OH produced is 1 mole.
When 2 mol of carbon dioxide and 3 mol of hydrogen, then one mole of methanol will be produced. Therefore, option (a) is correct.
What is the limiting reagent?A limiting reagent is a substance or reactant that is completely consumed in the completion of a chemical reaction and is also known as limiting reactant.
When reactants are not present in stoichiometric quantities, the limiting reactant decides the maximum amount of product that can be formed in a chemical reaction from the reactants.
Given the balanced chemical equation of formation of methanol:
CO₂ + 3 H₂ → CH₃OH + H₂O
From the above reaction, we can say that 1 mole of carbon dioxide reacts with three moles of hydrogen gas to form one mole of methanol.
Then, 2mol of carbon dioxide will react with 6 moles of hydrogen gas.
But we have only 3 mol of hydrogen gas therefore, hydrogen gas acts as a limiting reagent that will be consumed first.
Therefore, three moles of hydrogen gas will produce one mole of methanol maximum.
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which water boils can be related to the weather.
Quick boiling of water can be related to the hot weather because in high temperature water changes from liquid state to gaseous state.
Which water boils can be related to the weather?Water boils quickly when the weather is hot and warm because hot weather has high temperature which leads to the quick evaporation of the water. In hot weather, the liquid water changes into vapor state very quickly as compared to cold temperature.
So we can conclude that Quick boiling of water can be related to the hot weather because in high temperature water changes from liquid state to gaseous state.
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Which is always going to be the highest ionization energy?
Group of answer choices
A. 2nd Ionization Energy
B. 1st Ionization energy
C. All Ionization energies are equal.
D. 3rd Ionization Energy
Answer: I think it's B.
Explanation:
The second ionization energy is always the highest ionization energy. Ionization energy is the energy required to remove an electron from an atom in its gaseous state. Hence the correct option is A.
The first ionization energy is the energy required to remove the first electron from an atom. The second ionization energy is the energy required to remove the second electron from an atom that has already lost one electron.
The first ionization energy is always lower than the second ionization energy because the first electron is easier to remove because it is not as strongly attracted to the nucleus.
Once one electron has been removed, the remaining electrons are more strongly attracted to the nucleus, making it more difficult to remove the second electron.
Therefore, option A) 2nd Ionization Energy is correct.
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What is the concentration of a KCl solution made by diluting 75.0 mL of a 0.200 M solution to a final volume of 100. mL?
Answer:
0.15 M KCl
Explanation:
(Step 1)
Convert the original volume from mL to L. Calculate the moles of the original solution.
75.0 mL / 1,000 = 0.0750 L
Molarity = moles / volume (L)
0.200 M = moles / 0.0750 L
0.0150 = moles
(Step 2)
Convert the final volume from mL to L. Calculate the final molarity.
100. mL / 1,000 = 0.100 L
Molarity = moles / volume (L)
Molarity = 0.0150 moles / 0.100 L
Molarity = 0.15 M
Oliver and Mike put some ice into a container and heat it .
Answer:
See below
Explanation:
From the graph: initial temp = -10 ° C
melting occurs at 0 ° C (constant temp process)
at '2' the ice is melting.....going from a solid to a liquid at a constant temperature
At the triple point on a phase diagram, what state(s) of matter exist?
Group of answer choices
A. Liquid ONLY
B. None of the 3 states of matter (Solid, Liquid or Gas) exist at this point.
C. Solid, Liquid and Gas
D. Solid and Liquid
At the triple point on a phase diagram, the state(s) of matter exist is option C: Solid, Liquid and Gas.
What states of matter exist at the triple point?In a state of pressure and temperature of a given triple point, all three phases (known to be the solid, liquid and gas state) are seen to often exist in equilibrium.
Note that the triple point is said to be one that stands for the lowest pressure in which a liquid phase can live in equilibrium with that of the solid or vapor.
Hence, the statement of At the triple point on a phase diagram, the state(s) of matter exist is option C: Solid, Liquid and Gas is true.
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In a perfect world, reactions can never go above 100% yield. However in reality you will sometimes get above 100% yield. Why?
Group of answer choices
A. Excess water and Impurities
B. Impurities Only
C. Excess Water Only
D. You can never have above 100% yield under any circumstance.
Excess water and impurities. Option A.
Under what conditions can one get over a 100% yield?In the actual sense of it, no chemical reaction can give over a 100% yield. The upper limit cannot be breached. Thus, if more than a 100% yield is obtained, there is a problem somewhere.
One of the problems could be that the product is not sufficiently dried. In other words, excess water has contributed to the yield of the reaction.
The second likely problem could be that at some points during the reaction, impurities have been introduced. The weight of the impurities will add to the actual yield and give a bogus over a 100% yield.
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Solve the following question
Answer:
140. J/g*K
Explanation:
To find the specific heat capacity, you need to use the following equation:
Q = mcΔT
In this equation,
-----> Q = energy/heat (J)
-----> m = mass (g)
-----> c = specific heat (J/mole*K)
-----> ΔT = change in temperature (K)
Before you can use the equation above, you need to (1) convert kg to grams, then (2) convert grams to moles (via molar mass), and then (3) convert Celsius to Kelvin. The final answer should have 3 significant figures.
1.11 kg C₄H₈O₂ x 1,000 = 1110 g
Molar Mass (C₄H₈O₂): 4(12.01 g/mol) + 8(1.008 g/mol) + 2(16.00 g/mol)
Molar Mass (C₄H₈O₂): 88.104 g/mol
1110 grams C₄H₈O₂ 1 mole
------------------------------ x ------------------------- = 12.6 moles C₄H₈O₂
88.104 grams
34.5 °C + 273 = 307.5 K
52.3 °C + 273 = 325.3 K
Q = mcΔT <----- Equation
3.14 x 10⁴ J = (12.6 moles)c(325.3 K - 307.5 K) <----- Insert values
3.14 x 10⁴ J = (12.6 moles)c(17.8) <----- Subtract
3.14 x 10⁴ J = (224.28)c <----- Multiply 12.6 and 17.8
140. = c <----- Divide both sides by 224.28
**this answer may be slightly off due to using different molar masses/Kelvin conversions**
is Cu^2+ + 2Br^- --> Cu + Br2 a spontaneous or non-spontaneous redox reaction?
The reaction above is a spontaneous reaction
Cu^2+ + 2Br^- --> Cu + Br2
What is spontaneous redox reaction?A spontaneous redox reaction is a special type of redox reaction which involves the release of energy where the electrons are transferred from from an anode to the cathode
General spontaneous redox reactions is found mostly in electrochemical cells
So therefore, the reaction above is a spontaneous reaction.
Cu^2+ + 2Br^- --> Cu + Br2
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