What happened to the number of moles in a sample that originally occupied 500mL with 2.50 moles and then occupied 750mL?It deals with gas laws

Answers

Answer 1

Answer: Either you have added an extra half of the # of moles or you changed the condition (lower the pressure or increase the temp.)

Answer 2

Answer:

Answer: The number of moles that initially occupied a 250ml container remains the same when it occupied 750ml container but they are freer because the 750ml container is bigger and has more space. So the gases now occupied more space and their movement is less curtailed unlike when they were in 250ml container

Related Questions

If you had to pick between fission or fusion to power the world, which would you pick and why?
Which of the following shows a periodic pattern?A.there are two ducks in one pond.B.there is meat next to the cheese in the refrigeratorC.a boy waits five minutes to talk to his fatherD.the mother takes her medication everyday at seven
The making of ice cubes is an endothermic reaction
Which chemical formula shows a covalent compound?NaClHBrMgOCO2
63 C = _____ 63 K 336 K 210 K 163 K

In a group assignment, students are required to fill 10 beakers with 0.720 M CaCl2. If the molar mass of CaCl2 is 110.98 g/mol and each beaker must have 250. mL of solution, what mass of CaCl2 would be used?1)3.13 g
2)38.5 g
3)200 g
4)617 g

Answers

200 g is the mass of $CaCl_2$ would be used. Hence, option C is correct.

Define the molarity of a solution.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

Total volume = 10 x 0.250 liters = 2.5 liters

M = n ÷ V

Total moles: n = M x V

= 0.720mol/liter x 2.5 liter

=1.8 mol

Molar mass = grams / n

1.8 mol x 110.98 g/mol

= 199.8 grams

Hence, option C is correct.

Learn more about moles here:

brainly.com/question/8455949

#SPJ2

Total volume = 10*0.250 liters = 2.5 liters
M = n / V (liters)
Total moles: n = M*V = 0.720mol/liter *2.5 liter =1.8 mol

MM = grams / n --> grams = n*MM = 1.8 mol * 110.98 g/mol = 199.8 grams

Answer: option 3) 200 g.

Which process is exothermic?(1) boiling of water
(2) melting of copper
(3) condensation of ethanol vapor
(4) sublimation of iodine

Answers

Answer:

The correct answer is option 3.

Explanation:

Condensationof ethanol vapors is an exothermic process. This is because particles in gaseous has highest energy . Some of this energy gets released when these particles or ethanol vapors condenses into a liquid state where they have less amount of energy in comparison to gaseous state.

$C_2H_5OH(g)\rightarrow C_2H_5OH(l) + Heat$

As we know that exothermic reaction are those reaction in which heat is released into the surroundings.

Where as the other options are example of an endothermic reaction.where heat is absorbed from the surroundings.

Hence, the correct answer is option 3.

An equilibrium mixture of PCl5(g), PCl3(g), and Cl2(g) has partial pressures of 217.0 Torr, 13.2 Torr, and 13.2 Torr, respectively. A quantity of Cl2(g) is injected into the mixture, and the total pressure jumps to 263.0 Torr (at the moment of mixing). The system then re-equilibrates. The appropriate chemical equation is:PCl3(g) + Cl2(g) ---> PCl5(g)

Calculate the new partial pressures after equilibrium is reestablished. [in torr]

PPCl3

PPCl2

PPCl5

Answers

equilibrium is a situation in which economic forces such as supply and demand are balanced and in the absence of external influences the values of economic variables will not change

The equilibrium constant depends on the following:-

Pressure
Volume

The formula used in the question is as follows:-

$k_p = (P_1)/(P_1*P_2)$ , After putting the value, the equilibrium constant is as follows:-

$k_p = (217)/(13.2*13.2)$

After solving it, the equilibrium constant is 1.245.

The pressure in different systems is as follows:-

Hence, the total pressure is:- $P_1 + P_2+ P_3$

$263 = 13.2 + P_2 + 217$

After solving it, the P2 is 32.8torr.

The equilibrium constant in the second case is:-

$k_p = (P_1^')/(P_1^' * P_2^')$

After putting the value,

$1.245= (217+x)/((13.2-x )* (32.8-x))$

After solving, the value of x is 6.402torr

Hence, the partial pressure $PCL_3,\ CL2, \ PLC_5\$ is 6.798, 26.398, and 223.402 respectively.

For more information, refer to the link;-

brainly.com/question/18222206

Answer:

The new partial pressures after equilibrium is reestablished for $PCl_3$ :

$P_1'=6.798 Torr$

The new partial pressures after equilibrium is reestablished $Cl_2$ :

$P_2'=26.398 Torr$

The new partial pressures after equilibrium is reestablished for $PCl_5$ :

$P_3'=223.402 Torr$

Explanation:

$PCl_3(g) + Cl_2(g)\rightleftharpoons PCl_5(g)$

At equilibrium before adding chlorine gas:

Partial pressure of the $PCl_3=P_1=13.2 Torr$

Partial pressure of the $Cl_2=P_2=13.2 Torr$

Partial pressure of the $PCl_5=P_3=217.0 Torr$

The expression of an equilibrium constant is given by :

$K_p=(P_1)/(P_1* P_2)$

$=(217.0 Torr)/(13.2 Torr* 13.2 Torr)=1.245$

At equilibrium after adding chlorine gas:

Partial pressure of the $PCl_3=P_1'=13.2 Torr$

Partial pressure of the $Cl_2=P_2'=?$

Partial pressure of the $PCl_5=P_3'=217.0 Torr$

Total pressure of the system = P = 263.0 Torr

$P=P_1'+P_2'+P_3'$

$263.0Torr=13.2 Torr+P_2'+217.0 Torr$

$P_2'=32.8 Torr$

$PCl_3(g) + Cl_2(g)\rightleftharpoons PCl_5(g)$

At initail

(13.2) Torr (32.8) Torr (13.2) Torr

At equilbriumm

(13.2-x) Torr (32.8-x) Torr (217.0+x) Torr

$K_p=(P_3')/(P_1'* P_2')$

$1.245=((217.0+x))/((13.2-x)(32.8-x))$

Solving for x;

x = 6.402 Torr

The new partial pressures after equilibrium is reestablished for $PCl_3$ :

$P_1'=(13.2-x) Torr=(13.2-6.402) Torr=6.798 Torr$

The new partial pressures after equilibrium is reestablished $Cl_2$ :

$P_2'=(32.8-x) Torr=(32.8-6.402) Torr=26.398 Torr$

The new partial pressures after equilibrium is reestablished for $PCl_5$ :

$P_3'=(217.0+x) Torr=(217+6.402) Torr=223.402 Torr$

Carbon dioxide is one of the main gases in the mixture of gases coming out of the kiln.Give two reasons why.

Answers

because the kiln utilizes fire, fire uses oxygen and the fuel to create CO2
CO2 would be the main gas because the main components of the reactants are carbon and oxygen, which make up CO2

Which molecule has a nonpolar covalent bond?

Answers

Nonpolar covalent bonds are chemical bonds where two atoms share a pair of electrons with each other and the electronegativities of the two atoms are equal. An example is methane. It has four carbon-hydrogen single covalent bonds. These bonds are nonpolar because the electrons are shared equally.

Final answer:

Nonpolar covalent bonds form when two atoms of the same element or different elements share electrons equally, resulting in a balanced charge distribution. Examples include Methane (CH4) and molecular oxygen (O2). Another case is the CO2 molecule, which is nonpolar because its polar bond moments cancel out.

Explanation:

This leads to a balanced distribution of charges in the molecule, making it nonpolar. Methane, for instance, consists of a carbon atom that shares four electrons equally with four hydrogen atoms, resulting in a bond where the difference in electronegativity between the carbon and hydrogen atoms is minimal.

Another case is CO₂ where the molecule, though consisting of polar bonds, is overall nonpolar because the geometric layout of the molecule allows for the bond moments to cancel each other out, hence no region of the molecule is more positive or negative than any other. Considering the geometry of the molecule is essential when determining the polarity of a molecule with more than one bond.

Learn more about Nonpolar Covalent Bonds here:

brainly.com/question/14470991

#SPJ6

What was the minimum temperature to the nearest degree for the thermometer shown here? / a. +16ºC b. +4ºC c. -13ºC d. -6ºC

Answers

A figure of the thermometer for this problem is not given so I cannot really give a specific answer. Maybe this would help. The minimum temperature would be the lowest reading possible in the thermometer. Most probably it is option C or D. Hope this helps.

Answer:

Other Questions

44 points! Will medal!3. A calorimeter contains 500 g of water at 25°C. You place a hand warmer containing 200 g of liquid sodium acetate inside the calorimeter. When the sodium acetate finishes crystallizing, the temperature of the water inside the calorimeter is 39.4°C. The specific heat of water is 4.18 J/g-°C. How much energy was needed to heat the water?

26 A substance that dissolves in water and produces hydronium ions as the only positive ions in the solution is classified as(1) an alcohol (3) a base(2) an acid (4) a salt

How many milliliters of hydrogen gas are produced by the reaction 0.020 mol of magnesium with excess of hydrochloric acid at STP?

Which of the following best defines the term oxidation state?a. The oxidation state is the rate of oxygen consumption. b. The oxidation state is the rate of oxygen production. c. The oxidation state is the number of electrons an atom or ion has gained or lost with respect to its neutral state. d. The oxidation state is the rate at which a redox reaction approaches its charge neutrality.