Question

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 16.8 g of carbon were burned in the presence of 60.5 g of oxygen, 15.7 g of oxygen remained unreacted. What mass of carbon dioxide was produced? Using one decimal placement

Answer 1

ANSWER. When carbon is burned in air it reacts with oxygen to form CO₂.Thestoichiometric equation is given by

C + O₂ CO₂  ----------(1)

According to the eq(1) 1 mole of carbon reacts with 1 mole of O₂ molecule produces 1 mole of CO_2.   Given that 16.8 g of C burned with 44.8 g of O₂.i.e 1.4 moles of C reacts with 1.4 moles of O₂.So 1.4 moles of CO₂.

Mass of   CO₂ obtained =moles of  CO₂ xmolar mass =1.4x44=61.6 g.

Mass of  CO₂ produced =61.6 g