What mass of CO must react with excess oxygen to produce 0.96 g of CO2?

2CO + O2 = 2CO2

To find the mass of CO required to produce 0.96 g of CO2, we need to use the stoichiometry of the balanced equation.

From the balanced equation, we can see that the molar ratio of CO to CO2 is 2:2, which means that for every 2 moles of CO, 2 moles of CO2 are produced.

1 mole of CO2 has a molar mass of 44 g/mol.

To find the mass of CO required, we will use the following equation:

(0.96 g CO2) * (2 moles CO2 / 44 g CO2) * (2 moles CO / 2 moles CO2) * (28 g CO / 1 mole CO) = 0.96 * 2 * 2 * 28 / 44 = 1.21 g CO

Therefore, the mass of CO required to produce 0.96 g of CO2 is approximately 1.21 grams.