Question

Quizzes Question 3 How many liters of hydrogen gas are formed from the complete reaction of 15.5g C? C(s) + H2O(g) --> CO(g)+ H2(g) Assume that the hydrogen gas is collected at a pressure of 1.00 atm and a temperature of 27.0 C. 2.86 L 31.8L 388L None of the above 38.0L Question 4 A gas is compressed from an initial volume of 3.33L to final volume of 0.22L by an external pressure of 0.50 atm. compression the gas releases 50.0 J of heat. What is the

Answer 1

Molar mass of C = 12 g/mole

Calculate the moles of C as follows:

n = mass/molar mass = 15.5/12 = 1.292 moles.

From the balanced reaction , 1 mole of C will give 1 mole of H2.

Moles of H2 produced = 1.292 moles

Calculate the volume of H2 as follows:

PV = nRT

1*V = 1.292*0.08206*(273 + 27)

V = 31.8 L

Therefore, 2nd option is the correct answer.

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