Question

What mass of carbon will produce 11g of carbon dioxide when 12g of carbon produces 44g of carbon dioxide

Answer 1

Answer:

The mass of C that produces 11g of CO₂ is 3g.

Explanation:

The required chemical reaction is,

                      C + O₂ → CO₂

   So, 1 mole of C gives 1 mole of CO₂.

⇒       12 g of C gives 44 g of CO₂.

given that,

       mass of CO₂ = 11 g

then,

      moles of CO₂ = mass of CO₂ / molar mass of CO₂

⇒                           = 11g / 44g = 0.25 mol.

the number of moles of C needed is 0.25 mol.

           mass of C = moles of C × molar mass of C

⇒                          = 0.25 × 12 = 3g

mass of carbon is 3g.