In the commercial production of the element arsenic, arsenic (III) oxide is heated with carbon, which reduces the oxide to the metal according to the following equation: 2As2O3 + 3C --> 3CO2 + 4As.

b. In a large reaction vessel, 2.5 kilograms of arsenic (III) oxide and 0.5 kilograms of carbon are combined. What is the percentage yield is 1.75 kilograms of arsenic are produced? (Hint 1. 1000 grams = 1 kg. Hint 2. What is the limiting reaction?)