Stoichiometry Assignment Questions

Question

I need help with my Stoichiometry Assignment, It's below.

4 CH3NH2 + 9 O2 → 4 CO2 + 10 H20 + 2 N2

if you start with 50 g CH3NH2

a) How many grams of O2 will react?

b) How many grams of CO2 will be produced?

c) How many grams of H2O will be produced?

d) How many grams of N2 will be produced?

Answer 1

4 CH₃NH₂ + 9 O₂ ==> 4 CO₂ + 10 H₂0 + 2 N₂

We can use dimensional analysis and the stoichiometry (mole ratio) of the balanced equation to answer these questions. We will also need molar mass ofCH3NH2, O2, CO2, H2O and N2 which can be determined from the periodic table.

a) 50 g CH3NH2 x 1 mol CH3NH2 /31 g x 9 mol O2 / 4 mol CH3NH2 x 32 g O2/mol O2 = 116 g O2 (120 g)

b) 50 g CH3NH2 x 1 mol CH3NH2 /31 g x 4 mol CO2 / 4 mol CH3NH2 x 44 g CO2/mol = 71 g CO2

c) 50 g CH3NH2 x 1 mol CH3NH2 /31 g x 10 mol H2O / 4 mol CH3NH2 x 18 g H2O/mol = 73 g H2O

d) 50 g CH3NH2 x 1 mol CH3NH2 /31 g x 2 mol N2 / 4 mol CH3NH2 x 28 g N2 / mol = 23 g N2