The mass of carbon required to obtain 22g. carbon dioxide …

1. Let us write down the equation for obtaining carbon dioxide from carbon:

C + O2 = CO2;

2.Calculate the chemical amount of carbon dioxide:

n (CO2) = m (CO2): M (CO2);

M (CO2) = 12 + 16 * 2 = 44 g / mol;

n (CO2) = 22: 44 = 0.5 mol;

3. Determine the amount and calculate the mass of carbon that went into the reaction:

n (C) = n (CO2) = 0.5 mol;

m (C) = n (C) * M (C) = 0.5 * 12 = 6 g.

Answer: 6 g.