Question

how many grams co2 are produced from 18.8 g of oxygen gas

Answer 1

number of mole = (given mass)/(molar mass)

molar mass of O =16 g/mol

number of mole of O = (18.8/16) mole

number of mole of O = 1.2 mole

2 mole of O give 1 mole of CO2

1 mole of O give 1/2mole of CO2

1.2 mole of O give (1/2)*1.2 mole of CO2

numberof mole of CO2 = (1/2)*1.2 mole

numberof mole of CO2 = 0.6 mole

molar mass of CO2 = 44 g/mol

massof CO2 formed = (number of mole)*(molar mass of CO2)

massof CO2 formed = (0.6*44) g

massof CO2 formed = 26.4 g

Answer : 26.4 g