Question

Calculate the number of moles of carbon dioxide formed when 40.0 moles of oxygen is consumed in the burning of propane: C3H8 + 5O2----> 3CO2 + 4H2O

Answer 1

21. A 8.0 L sample at 25 °C and 1.00 atm of pressure contains 0.5 moles of a gas. If an additional 0.75 moles of gas at the same pressure and temperature are added, what is the final total volume of the gas?
a. 20 L
b. 20 ml
c. 30 L
d. 25.5 L


22. 7.2 liters of an ideal gas are contained at 4.0 atm and 27 °C. Using the ideal gas law, calculate how many moles of this gas are present.
a. 22 mol
b. 1.2 L
c. 2.1 mol
d. 1.2 mol

Answer 2

One mole propane consumes 5 moles Oxygen
x moles propane consumes 40 moles Oxygen.
So x = 8

One mole propane produces 3 moles CO2
8 moles propane produces 24 moles CO2

Answer 3

21. If volume of 0.5 moles gas is 8.0 litres,
volume of 0.75 moles is 12 litres.
What is total volume?

Answer 4

22. pV = nRT, T = 300,15 K
n = pV/RT