Option a) is correct - if the volume of this reaction at chemical equilibrium is increased, the reaction will shift to the left in the direction of the reactants.
When considering the effect a change in volume or pressure will have on the system that is in chemical equilibrium, it is very important to take into account the aggregate state of all the reaction components. The rule is that the increase in volume will result in the reaction shifting in the direction with more gaseous particles.
So, we analyze our reaction - on the left side we have 5 gaseous particles in total (3 hydrogen sulfide molecules and two oxygen molecules). On the right side, we have either two (if the water is liquid) or four (if the water is also in the vapor phase).
Since we have more molecules in the gaseous phase on the left side of the reaction, if we increase the volume, the reaction will shift to the left, in the direction of the reactants (option a).
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Which of the following statements correctly describe the spin quantum number of the electron?
a. The spin quantum number has values of +1 or -1.
b. The spin quantum number has values of +į or-
c. The spin quantum number is a property of the electron itself.
d. The spin quantum number depends on the type of orbital the electron is in.
The spin quantum number has values of +1212 or -1212.
The spin quantum number is a property of the electron itself.
The electron is a subatomic particle with an electric charge of one elementary charge less than positive. It is represented by the symbol for. Given that they have no known components or substructure and are a member of the first generation of lepton particles, electrons are typically regarded as elementary particles. Approximately 1/1836th of a proton's mass is that of an electron. An intrinsic half-integer value angular momentum (spin) with units of the decreased Planck constant, is one of the electron's quantum mechanical properties. The Pauli exclusion principle states that since electrons are fermions, they can never share the same quantum state. Electrons, like all elementary particles, have the ability to interact with other particles and behave like waves when they are diffracted, similar to how light does.
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What type of rock are continental plates made from?
Answer: granitic rocks
Explanation: Continental crust is composed of granitic rocks which are made up of relatively lightweight minerals such as quartz and feldspar. By contrast, oceanic crust is composed of basaltic rocks, which are much denser and heavier.
Answer:
Granites
Explanation:
Continental plates are made from different type of granites as well.
:)
question in picture .........
True or False?
Mendeleev organized elements in his periodic table in order of increasing atomic number.
Answer:
True
Explanation:
because hydrogen is the first element and the atomic mass is 1 and after that the atomic number is kept increase
POSSIB
A student drops three balls of identical size but different masses from a height of one meter high into a container of sand.
The first ball has a mass of one gram.
The second ball has a mass of three grams.
The third ball has a mass of five grams.
Which ball will make the biggest crater in the sand and why?
(1 point for correct answer, 1 point for correct reason why)
B I
1
0/1
9 10 11 12 13 14 15
The third ball of 5 grams of mass will make the biggest crater in the sand because force is directly proportional to mass. so the greeter the mass, the greater its force and impact.
what is mass?Mass is described as the quantity of matter in a physical body.
Mass is also a measure of the body's inertia, the resistance to acceleration when a net force is applied.
Mass is always known to be constant for a body. We can calculate mass by:
Mass = volume × density.
Weight is the measure of the gravitational force acting on a mass. The SI unit of mass is the "kilogram"
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A sample of gas occupies a volume of 450.0 mL at 740 mm Hg and 16°C. Determine the volume of this
sample at 760 mm Hg and 37°C.
The volume of this sample at 760 mm Hg and 37°C is 474.92 mL.
How to calculate volume?We know that,
PV = nRT, the fundamental law of ideal gas.
Where P is the gas's pressure in atmospheres.
The gas's volume in L is denoted by V.
n is the number of moles of the gas in a mole.
The general gas constant is R.
The gas's temperature is T in Kelvins.
If n is constant and (P, V, and T) have two different values:
P1V1T2 = P2V2T1
P1 is 740 mmHg, V1 is 450 mL, and T1 is 16 °C plus 273 K.
P2 equals 760 mmHg, V2 is??? mL, and T2 is 37 °C plus 273 K, or 310 K.
V2 = P1V1T2/P2T1 = (740 mmHg), 450 mL, 310 K), and 760 mmHg, 286 K) = 474.92 mL, respectively.
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When the following equation is balanced, the coefficients are ________.
NH3(g) + O2(g) → NO2(g) + H2O(g)
a. 3
b. 7
c. 12
d. 14
The correct answer is option B: 7
When the following equation is balanced, the coefficients are 7.
According to the law of conversation of mass, matter is neither created nor destroyed, it only transforms form one phase to another.
First of all, write the unbalanced chemical equation.
N[tex]H_{3}[/tex](g) + [tex]O_{2}[/tex](g) → N[tex]O_{2}[/tex](g) + [tex]H_{2}[/tex]O(g)
Now, split the reaction in half and try to balance the number of atoms on each side of the chemical reaction.
After that add appropriate coefficients to balance the atoms on either side.
In the chemical equation, electron gain and lost must be equal.
At last, to balance the coefficients of all the species, multiply with a whole number or integer.
Now if we choose the following coefficients i.e. 4, 7, 4, 6 on both sides of the equation, we see the equation becomes:
4[tex]NH_{3}[/tex](g) + 7[tex]O_{2}[/tex](g) → 4N[tex]O_{2}[/tex](g) + 6[tex]H_{2}[/tex]O(g)
To verify, always check that the equation has same number of atoms on either side.
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If 1. 00 kg of zn reacted with excess sulfur, how much energy would be released? enter your answer as a positive value.
Answer: 3168.92 kJ
Hope this helps!
identify the expected color of each element in a model of a molecule.
The expected color of each element in a model of a molecule is black, red, blue, and white.
When we observe the model of a molecule in a color-based spectrum then we see different colors as the molecule is made up of different atoms.
So, in the full color-based spectrum, elements of organic carbon show different colors. It appears to be black, blue, red, and green.
However, in the color-based spectrum, carbon is black.
In the gaseous state, oxygen is colorless, however, in liquid form, it appears to have a pale blue color.
Nitrogen makes up a major portion of the atmosphere. The sky color appears to be blue due to nitrogen. Hence, nitrogen is blue. Hydrogen is a white colorless gas.
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The complete question is:
Identify the expected color of each element in a model of a molecule.
Carbon
Oxygen
Nitrogen
Hydrogen
The air we breathe can also affect weathering in several ways. Which of the answers provided below is NOT a way that air is considered to contribute to weathering?
Select one:
a.
The ozone in the air will make rock brittle and crack.
b.
Wind will act as an abrasive agent wearing down rock.
c.
Oxygen in the air will act as a chemical agent and oxidize iron in rocks thereby wearing them down.
The ozone in the air will make rock brittle and crack is not considered to contribute to weathering.
Weathering is a process that breaks down or disintegrates the rocks which are present on the surface of our planet. The air we breathe can affect weathering in several ways.
Wind will act as an abrasive agent wearing down rock. The wind when it comes in contact with rocks would carry small particles from the rock along with it. In long run, the rock would disintegrate.
Oxygen in the air will act as a chemical agent and oxidize iron in rocks thereby wearing them down. The rocks with iron in it would react with oxygen in the air and would turn to rust. The process is called oxidation. Rust in rock would weaken them and wear it down.
The ozone in the air would not make rock brittle and crack. It makes rubber brittle by breaking the bonds in rubber polymer.
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when you buy vinegar at the store, you are usually purchasing a solution that is 5% acetic acid (vinegar) and 95% water. find the mass of acetic acid in a 500. ml bottle of vinegar. the density of vinegar is 1.05 g/ml. g acetic acid
The density of the solution is required to convert 5% by mass acetic acid to M (molarity).
Why do we do it?10% by mass = 10 g solution/100 g acetic acid
One mole of acetic acid in five grams (60.05 grams) equals 0.033 moles of acetic acid.
Once you are aware of the solution's density, you may determine its volume and divide the number of moles of acetic acid by the volume in liters to get M (moles/liter).
Here is how to compute the molarity if all you want to do is pretend that the density is 1 g/ml even though it is actually 1.06 g/ml.
Assuming a density of 1 g/ml, 5% by mass equals 5 g/100 g, which is the same as 5 g/100 ml.
50 g/liter x 5 g/100 milliliter
0.8 M is equal to 50 g/liter times 1 mole/60 g, or 0.83 moles/liter.
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3.
Find the correct element based on the information given (on the right side) and then drag
the element over.
Cesium
Magnesium
Bismuth
Bromine
Period 3 & Group 2A
Answer by dragging items here
Period & Group 7A
Answer by dragging items here
Period 6 & Group 1A
Answer by dragging items here
Period 6 & Group SA
Answer by dragging items here
Period 3 & Group 2A = Magnesium
Period & Group 7A = Bromine
Period 6 & Group 1A = Cesium
Period 6 & Group SA = Bismuth
What is groups and period in periodic table ?Groups - The horizontal row of the periodic table that represents an element's valence electron count.
Periods - The horizontal columns of the periodic table that represent an element's number of electron shells. Families: Compounds with comparable characteristics and the same number of valence electrons.
Elements in the periodic table can be divided into groups and eras. The periodic table is organised into horizontal rows for periods and vertical columns for groupings. As you proceed over a period or down a group, the atomic number rises.Learn more about Periodic table here:
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WILL GIVE BRAINLIEST PLS HELP
Answer: I think the answer is B
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Suppose you made a wave by pinching the coils of a spring together and then letting go. a few seconds later, the springs coils arent as far apart in its compressions or as far apart in its rarefactions. what has happened to the wave, and what type of wave does this model?
This model shows longitudinal waves.
A longitudinal wave is a form of a wave that travels within the direction of the medium, however, a transverse wave is every other sort of wave that travels within the path of the medium. Longitudinal waves are made of compressions and rarefactions, at the same time as transverse waves are the product of crests and troughs.
In a longitudinal wave, the debris is displaced parallel to the course the wave travels. An instance of longitudinal waves is compressions transferring along a slinky. we can make a horizontal longitudinal wave with the aid of pushing and pulling the slinky horizontally.
Longitudinal waves are mechanical waves that require a medium for propagation, transverse waves are non-mechanical waves that do not require a medium for propagation. Longitudinal waves include compressions and rarefactions, whilst transverse waves include crests and troughs.
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What is the number of electrons in an Al³+ ion?
A) 10
B) 13
C) 3
D) 16
Answer: there are 10 electrons associated with a single Al3+ ion.
Explanation:
if 4.95 g of ethylene (c2h4) are combusted with 3.25 g of oxygen. first write the balanced equation a. what is the limiting reagent? a. how many grams of co2 are formed?
The limiting reagent is oxygen .
The mass of carbon dioxide produced is 2.9612g.
What is limiting agent ?
When a chemical reaction is complete, the limiting reagent—also known as the limiting reactant or limiting agent—is the reactant that has been completely consumed.
Ethane, often known as ethylene, is an unsaturated carbon molecule made up of two carbon atoms. Ethylene is burned in the presence of oxygen during the combustion reaction, producing carbon dioxide and water as byproducts.
Complete response:
Hydrocarbons are burned when they come into contact with oxygen, which causes a chemical reaction that produces carbon dioxide and water. The following is a representation of the balanced chemical equation for ethylene combustion:
C2H4+3O2→2CO2+2H2O
According to stoichiometric coefficients, one mole of ethylene produces two moles of carbon dioxide gas and two moles of water vapour for every mole of oxygen that is used.
Ethylene and oxygen therefore react at a 1:3 ratio.
The ratio of their masses to their molar masses can be used to calculate the amount of moles of ethylene and oxygen.
given mass = n
in molar mass
The number of ethylene moles is:
n(C2H4)=4.95g28gmol−1=0.177
The formula for oxygen moles is n(O2)=3.25g32gmol1=0.101
A reactant that is less prevalent and is consumed earlier in the reaction is the limiting reagent.
Although there is less oxygen available for the reaction, 0.1773=0.531g of oxygen is required to maintain a 1:3 ratio between ethylene and oxygen. So, the limiting reagent is oxygen.
The amount of limiting reagents will determine how the reaction proceeds since once they are used up, the reaction ceases.
As a result, the ratio of oxygen reacting and carbon dioxide being created is 3:2, resulting in the formation of two-thirds (23) of a mole of carbon dioxide for every mole of oxygen.
As a result, two-thirds more moles of carbon dioxide were created than were used in the reaction of oxygen:
n(CO2)=0.101×(23)=0.0673
By dividing the moles by the molar mass of carbon dioxide, it is possible to determine the mass of carbon dioxide that is created.
n(CO2)=0.0673mol×44gmol−1=2.9612g
Therefore,
(a) oxygen is the limiting reagent and
(b) 2.9612g of carbon dioxide are generated.
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Part A: Use the opening passage to describe the relationship between nuclear fusion and stellar storms, which produce solar wind.
The expansion of plasma—a clump of charged particles—from the sun corona produces the solar wind (outermost atmosphere).
How does solar wind work?The solar wind is a stream of energetic, charged particles, principally protons and electrons, traveling across the solar system from the Sun at speeds of up to 900 km/s and a temperature of one million degrees (Celsius). It is created from plasma.
The solar wind is composed of what substances?A stream of powerful particles that the Sun ejects is known as the solar wind. These include the hydrogen electrons and protons as well as atomic nuclei such as helium, collectively known as alpha particles. Additionally, "heavy ions" and the atomic nuclei of carbon, nitrogen, oxygen, neon, and magnesium can be found in trace amounts.
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A chemistry graduate student combines 3.90 grams of potassium and 12.7 grams of iodine to form potassium iodide. according to the law of conservation of mass, how much potassium iodide should be formed if the reaction proceeds to completion?
A chemistry graduate student combines 3.90 grams of potassium and 12.7 grams of iodine to form potassium iodide. according to the law of conservation of mass, potassium iodide should be formed after the reaction is complete is 16.70 g.
According to the law of conservation mass, in a chemical reaction mass can neither be created nor destroyed.
According to the law, mass of the reactant is always equal to the mass of product, because in a chemical reaction, mass can neither be created nor destroyed.
The balanced chemical reaction is -
2 K + I₂ → 2 KI
3.90 g + 12.7 g = 16.70 g
16.70 g = 16.70 g
Therefore, when the reaction proceeds to completion, 16.70 g product is obtained as the sum of reactants is 16.70 g and according to law of conservation of mass, mass is neither created nor destroyed but it only converts from one form to another form.
Hence, potassium iodide formed is 16.70 g.
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discuss the relative permeability of the membrane to na and k in a resting neuron
A resting neuron is 4-5 times more permeable to potassium ions i.e K+ as there is a large number of open channels for the passage of ions.
At a normal resting period, the membrane is highly permeable to potassium ions (K+) because sodium ions are expelled out from the cells and potassium ions are forced inward the cell.
At this moment, the sodium-potassium gradient pump operates efficiently in order to exchange potassium inward and sodium outward the cell creating a potential gradient across the cell membrane. Moreover, in this case, the value of resting permeability of potassium ions is 1 as compared to sodium ions i.e. 0.4 much lower than potassium.
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Which formula contains a metal and a nonmetal?
O MgO
O SO2
O CO
O H₂O
MgO contains metal and non metal. Binary Ionic Compounds Containing a Metal and a Nonmetal.
Why are metals and nonmetals used?Electrical wires, cooking utensils, and other items are made of copper. Typically, zinc is used to coat iron to protect it. Manufacturing of electrical wires, packaging, kitchenware, and other items uses aluminium. Non-metals For example, welding torches and the manufacture of ammonia and methyl alcohol both utilise hydrogen.
Binary compounds are chemical mixtures made up of two unique components. An element is a substance that, when broken down chemically, cannot be further broken down into any simpler compounds. Magnesium oxide, calcium chloride, and sodium fluoride are all chemical elements.
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Elements that have an intermediate number of valence electrons will behave more like metals if they are?
Elements that have an intermediate number of valence electrons will behave more like metals if they are lower in group .
What is metal ?
In chemical processes, metals frequently lose electrons. In chemical reactions, nonmetals pick up electrons. When they are lower in the group and higher in the group, elements with an intermediate amount of valence electrons behave more like metals and less like nonmetals, respectively. They will act as metalloids if they are in the middle.
The elements that make up the periodic table are metals, nonmetals, and metalloids. Metals tend to lose electrons in chemical reactions because they are electropositive.
Because of the weak nucleus-based attraction, lesser elements can easily lose electrons from the valence shell.
What are valence electrons ?The amount of electrons an atom must gain or lose in order to achieve the electrical configuration of the nearby noble gas or inert gas is known as valence. "Valence electrons" are described as "non-filled electrons in the outer shells."
Because they have higher energy than the electrons in inner orbits, valence electrons participate in chemical reactions. A specific element's chemical characteristics, such as its valence or valency and the ability to form bonds with other elements, can also be determined by the quantity of valence electrons that are present. It also provides us with information on the quantity of unpaired electrons, the number of atoms that can participate, and how easily the atoms can make bonds.
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18. Propane has a heat of vaporization of 356 Joules per gram.
How much heat is needed to completely evaporate a
40 gram sample of propane at its boiling temperature of 230K?
The amount of heat needed to completely evaporate a 40 gram sample of propane at its boiling temperature of 230K is 14,420 joules of heat.
What is the heat of vaporization of a substance?The heat of vaporization of a substance is the amount of heat required to change a unit mass of a liquid substance to vapor at its boiling point.
The heat of vaporization of propane is given as 356 Joules per gram.
This means that 1 gram of liquid propane requires 356 joules of heat to be converted to vapor.
Hence, the amount of heat required to convert a 40 gram sample of propane to vapor will be:
Heat required = 40 gram * 356 Joules per gram
Heat required = 14,420 joules of heat.
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A marble has a mass of 0.230kg and a volume of 0.212L. What is the density of the marble in g/mL? Will
this marble FLOAT or SINK in water? EXPLAIN!
The density of the marble in g/mL is 1.084g/mL. As the density of Marble is 1084kg/m3 that is greater than that of water 1,000 kg/m3, hence it will sink.
Describe density.
Density, or mass per unit volume, is defined as the ratio of mass to volume.
Density is the mass of a material substance per unit Density. Density is defined by the formula Density = M / V, where d stands for Density, M for mass, and V for volume.
It gauges how much "stuff" an object contains in relation to its volume (cubic metre or cubic centimeter). In essence, Density is a measurement of how closely together matter is packed.
Grams per cubic centimetre are a typical unit of measurement for density. For instance, while Earth has a density of 5.51 grammes per cubic centimetre, water has a density of 1 grammes per cubic centimetre.
Water Density = 1,000 kg/m3
Marble density= 0.230kg / 0.212L
= 1.084g/mL
=1084kg/m3
As the density of Marble is 1084kg/m3 that is greater than that of water 1,000 kg/m3, hence it will sink.
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what is the vernier labquest used for in this experiment? question 1 options: it is used to make wavelength measurements. it is used to measure the mass of the experimental substance. it is used to measure the density of the experimental substance.
Option A and B both are correct answer
What is the Vernier?
Vernier, a Frenchman, invented the vernier calliper in 1631 as a tool for taking extremely precise linear measurements. It employs two graduated scales: the vernier, a specifically graduated auxiliary scale that slides parallel to the main scale and allows readings to be made down to a fraction of a division on the main scale, and a main scale that is comparable to that on a ruler.
Vernier Sizing
The vernier scale takes precise measurements. It contains two scales: a regular, huge scale (the main scale) and a smaller scale inside that is used to accurately compute measurements.
Due to the vernier acuity idea upon which it is built, the vernier scale provides accurate measurement. The misalignment of two line segments is measured by the vernier acuity, a form of visual acuity. Aligned and misaligned lines are easily distinguishable by the human eye.
Vernier Calipers have the following three main applications:
It is employed to gauge a tube's or cylinder's inside diameter.
It is helpful for determining an object's length.
The diameter of circular objects is often measured using a vernier calliper.
Vernier callipers are beneficial for a variety of tasks in addition to these, such as in the industrial sector and for professionals and engineers.
It is used to make wavelength measurements.
it is used to measure the mass of the experimental substance
Therefore both option A and B are correct answer
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6. Which statement describes starches, fats, proteins, and
DNA?
A) They are used to store genetic information.
B) They are complex molecules made from smaller
molecules.
C) They are used to assemble larger inorganic
materials.
D) They are simple molecules used as energy
sources.
The correct answer is (A)
The statement that describes starches, fats , proteins and DNA:
They are used to store genetic information.
Explain about genetic information?The linear sequence of nucleotides in DNA contains genetic information. Each DNA molecule is a double helix composed of two complementary strands of nucleotides held together by hydrogen bonds formed by G-C and A-T base pairs.The majority of DNA is found in the cell nucleus (where it is known as nuclear DNA), but a small amount can also be found in the mitochondria (where it is called mitochondrial DNA or (mtDNA). Mitochondria are cell structures that convert energy from food into a form that cells can use.DNA contains biological information in the form of sequences of four nucleic acid bases: adenine (A), thymine (T), cytosine (C), and guanine (G) strung along ribbons of sugar-phosphate molecules in the shape of a double helix.
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If your job is to test the amount of lead found in paint samples, what area of chemistry would have you studied
If your job is to test the amount of lead found in paint samples, then you should be specialized in Analytical Chemistry.
Analytical Chemistry is a branch of Chemistry and is a stream of Science that deals with the identification and quantification of various chemical substances in a mixture.
Sometimes the work of the chemists in the field may be related to inventing a new method for testing and identification of a certain chemical or element from a mixture. Their role is usually to perform analysis and interpret a lot by performing the analysis.
It also involves quantitative analysis for determining the numerical amount and concentration of various chemical substances.
So, if you wish to test the amount of lead found in paint samples, you need to focus on Analytical chemistry.
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what do you think will happen when you put corn starch and water
The corn starch and water will stay separated and eventually sit in the glass as layers. This is due to the 2 fluids having different densities far enough from one another that the fluids do not mix.
Answer:
Cornstarch and water mixed acts both like a solid and a liquid.
Explanation:
Cornstarch and water is a suspension mixture with a solid dispersed into a liquid. When you press the mixture quickly, the starch molecules close together. This causes the water to get trapped between the starch chains and create a semi-rigid structure.
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What is the name of Pb(NO3 ) 2 Explain how you determined the bond type and the steps you used to determine the naming convention for the compound
Name of Pb(NO3 )2 is Lead(II) nitrate.
Pb(NO3)2 is ionic as well as covalent
Pb is the symbol of lead and NO3 is a complex ion called nitrate. It has one nitrogen and three oxygens. Pb(NO3)2 is ionic as well as covalent. NO3 is covalent in nature because both nitrogen and oxygen are non-metals and therefore an ionic bond cannot be formed between them.
Ionic compounds are formed when a metal reacts with a nonmetal whereas covalent compounds are formed when two non -metals react with each other. Binary compounds containing hydrogen are usually covalent compounds as hydrogen is a non - metal.
An ionic bond donates an electron to the other atom in the bond whereas electrons in a covalent bond are shared equally between the atoms.
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why do organisms need to respond to their environment
I Hope this will Help You:-
Organisms need to detect and respond to changes in their internal and external environment. This is because the conditions inside our body must be carefully controlled for it to function effectively and survive. The control systems that allow organisms to respond to changes are incredibly important.
a 2.58 g sample of kno3 was added to 98.57 g of water in a coffee cup calorimeter. the initial temperature of the water was 22.5 °c and the temperature of the solution after mixing was 20.4 °c. on the basis of this experiment, what is the heat of solution per mole of kno3?
The specific heat of water is 4.184 J/goC.
What is specific heat?
The quantity of heat needed to increase the temperature of one gram of a substance by one degree Celsius. Typically, the units of specific heat are calories or joules per gram per degree Celsius. The specific heat of water, for instance, is 1 calorie (4.186 joules) per gram per degree Celsius.
The total mass of the solution =g of KNO3 + g of water
= (2.58+ 98.57) g
= 101.15 g
Change in temperature =(20.4 – 22.5) degree celcius = -2.1 degree celcius
q = mcΔT= 101.15 g x 4.184 j/goC x -2.1oC= -8 8.74 J
Moles of KNO3= 2.58/101.11= 0.0255 mol
The heat that is being lost by the water is being gained by KNO3 so it is + heat of solution per mole(J)= 888.74 J/0 .0255 mol= 34829.82257 J/mol= + 35 K J/mol
Hence, the heat of solution per mole is kno3 is 35KJ/mol
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