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3 years ago

Help please this is for a test

Chemistry

1 answer:

Charra [1.4K]3 years ago

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The activation energy for a reaction is the energy difference between what two components of a reaction?

lora16 [44]

Answer:

Activation Energy is the Energy that Must be Overcome/reached by Reactants for Products to be formed.

I'd go with the 2nd Option.

4 0

3 years ago

The stopcock connecting a 3.06 L bulb containing methane gas at a pressure of 9.61 atm, and a 6.65 L bulb containing oxygen gas

Contact [7]

Answer : The final pressure in the system is 4.22 atm.

Explanation :

First we have to calculate the moles of methane.

$PV=n_1RT$

where,

P = pressure of gas = 9.61 atm

V = volume of gas = 3.06 L

T = temperature of gas = T

$n_1$ = number of moles of methane gas = ?

R = gas constant

Now put all the given values in the ideal gas equation, we get:

$(9.61atm)\times (3.06L)=n_1\times RT$

$n_1=\frac{29.4}{RT}$

Now we have to calculate the moles of oxygen gas.

$PV=n_2RT$

where,

P = pressure of gas = 1.75 atm

V = volume of gas = 6.65 L

T = temperature of gas = T

$n_2$ = number of moles of oxygen gas = ?

R = gas constant

Now put all the given values in the ideal gas equation, we get:

$(1.75atm)\times (6.65L)=n_2\times RT$

$n_2=\frac{11.6}{RT}$

Now we have to determine the final pressure in the system after mixing the gases.

$P_{total}=(n_1+n_2)\times \frac{RT}{V_{total}}$

where,

$P_{total}$ = final pressure of gas = ?

$V_{total}$ = final volume of gas = (3.06 + 6.65)L = 9.71 L

T = temperature of gas = T

R = gas constant

Now put all the given values in the ideal gas equation, we get:

$P_{total}=(\frac{29.4}{RT}+\frac{11.6}{RT})\times \frac{RT}{9.71L}$

$P_{total}=4.22atm$

Therefore, the final pressure in the system is 4.22 atm.

4 0

3 years ago

What does Le Chateliers principle say about upsetting a system at equilibrium

iragen [17]

Le Chatelier principle says, if a restriction is applied to a system in equilibrium, the system adjusts to a new equilibrium that tends to counteract the restriction. When equilibrium is under stress it will shift to relieve that stress.

all concentrations would change.

3 0

3 years ago

a graduated cylinder has 35.0 mL of water in it before and object is dropped inside. The new volume is 38.5 mL. What is the volu

zlopas [31]

Displaced volume:

final volume - <span>initial volume

1 mL = 1 cm</span>³<span>

38.5 mL - 35.0 mL = 3.5 cm</span>³

hope this helps!

7 0

3 years ago

Soil is divided into different layers. There is topsoil and, below it, there is _______.

uranmaximum [27]

Answer:

Soil Horizons (layers): Soil is made up of distinct horizontal layers; these layers are called horizons. They range from rich, organic upper layers (humus and topsoil) to underlying rocky layers ( subsoil, regolith and bedrock).

Explanation:

4 0

3 years ago

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