I need help, please

Question

Consider the equation.

2C2H2+5O2⟶4CO2+2H2O

How many grams of oxygen must be supplied to completely burn  g of acetylene according to the balanced combustion reaction?

Answer 1

how many grams of acetylene?

It's going to be:

(grams O2 / molar mass O2) / coefficient O2 = (grams C2H2 / molar mass C2H2 ) / coefficient C2H2

(g O2 / 32.0 g/mol O2 ) / 5 mol O2 = ( g C2H2 / 24.04 g/mol C2H2 ) /2 mol C2H2

(gO2/32)/5=(gC2H2/24.04)/2

solve for gO2, after plugging in whatever value you're given for g C2H2(acetylene)