Answer:
Mass = 14.025 g
Explanation:
Given data:
Mass of Ca burn = 10 g
Mass of calcium oxide produced = ?
Solution:
Chemical equation:
2Ca + O₂   →   2CaO
Number of moles of Ca:
Number of moles = mass /molar mass
Number of moles = 10 g/ 40 g/mol
Number of moles = 0.25 mol
now we will compare the moles of Ca and CaO
        Ca       :       CaO
         2       :        2
        0.25      :       0.25
Mass of CaO;
Mass = number of moles × molar mass
Mass = 0.25 mol × 56.1 g/mol
Mass = 14.025 g
