Answer to Question #297033 in Chemistry for Zoe

Question

How many moles of carbon are in 333 mg of CaC2O4. 

Answer 1

Solution:

The molar mass of CaC₂O₄ is 128.097 g/mol

Hence,

(333 mg CaC₂O₄) × (1 g / 1000 mg) × (1 mol CaC₂O₄ / 128.097 g CaC₂O₄) = 0.0026 mol CaC₂O₄

Moles of CaC₂O₄ = 0.0026 mol

1 mol of CaC₂O₄ contains 2 mol of C

Thus, 0.0026 mol of CaC₂O₄ contains:

(0.0026 mol CaC₂O₄) × (2 mol C / 1 mol CaC₂O₄) = 0.0052 mol C

Moles of C = 0.0052 mol

Answer: 0.0052 moles of carbon