Can you solve this showing each step

Question

How many litres of Carbon dioxide are produced from 3.45 g of Carbon and excess oxygen at STAP?

Answer 1

First write the balanced reaction: C + O₂ --> CO₂. Convert the mass of C to moles: 3.45g C * (1 mol C /12.0g C) = 0.2875 mol C. Next multiply by the ratio of moles of CO₂ to moles of C in the reaction, which is just 1:1, so we have 0.2875 mol CO₂. At STP, 1 mole of any gas occupies 22.4 liters, so (0.2875 mol) * (22.4 L/1 mol) = 6.44 L of CO₂.