Question

The mass percent of element X

Answer 1

Answer:

128.4 g

Explanation:

Step 1: Given data

• Mass percent of element X in X(NO₃)₂: 52.55%

• Mass of the element X in the sample: 67.50 g

Step 2: Determine the total mass of the sample

The mass percent of element X in X(NO₃)₂ is 52.55%, that is, there are 52.55 g of X every 100 g of X(NO₃)₂. Then, the mass of X(NO₃)₂ that contains 67.50 g of X is:

67.50 g X × 100 g X(NO₃)₂/52.55 g X = 128.4 g X(NO₃)₂