Element A, mass 5.00 g, reacts exactly with 2.00 g of element B to form 7.00 g of compound AB. If 10.00 g of element A are reacted with 2.00 g of element B to form the same compound, what mass of compound AB will be formed?

Question

Quizplus · Accepted Answer

The reaction between element A and element B is in a fixed ratio by mass (5.00 g of A reacts with 2.00 g of B to form 7.00 g of AB). If 10.00 g of A is used, only 5.00 g will react with the 2.00 g of B, forming 7.00 g of AB, and leaving 5.00 g of A unreacted.

Element A, Mass 5