I need help solving these problems. I\'m so lost :( What volume of CO_2 at 15 de

Question

I need help solving these problems. I'm so lost :(

What volume of CO_2 at 15 degree C and 1.50 atm contains the same number of molecules as 0.410 L of O_2 at 35 degree C and 3.00 atm? Ammonia gas is synthesized according to the balanced equation below. N_2 (g) + 3 H_2 (g) rightarrow 2 NH_3 (g) If 2.75 L N_2 react with 7.75 L H_2, what is the theoretical yield (in liters) of NH_3? Assume that the volumes of reactants and products are measured at the same temperature and pressure. When a 45.0 g sample of an alloy at 100.0 degree C is dropped into 100.0 grams of water at 25.0 degree C, the final temperature is 37.0 degree C. What is the specific heat of the alloy? Given: the specific heat of water is 4.184 Jg^-10 C^-1

Explanation / Answer

5)

for same number of molecules, number of mol should also be same

Let’s find the number of mol of O2

Given:

P = 3.00 atm

V = 0.410 L

T = 35.0 oC = (35.0+273) K = 308 K

use:

P * V = n*R*T

3.00 atm * 0.410 L = n * 0.0821 atm.L/mol.K * 308.0 K

n = 0.0486 mol

CO2 should also be having same number of mol

Given:

P = 1.50 atm

n = 0.0486 mol

T = 15.0 oC = (15.0+273) K = 288 K

use:

P * V = n*R*T

1.50 atm * Vi = 0.0486 mol* 0.0821 atm.L/mol.K * 288.0 K

V = 0.766 L

Answer: 0.766 L

I am allowed to answer only 1 question at a time

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