A compound is found to consist of 1.37g of iron and 2.62g of chlorine. what is the percent by mass of chlorine in the compound?

The mass percent of chlorine can be calculated using the following rule:

mass % = (mass of chlorine / total compound mass) * 100

From the givens:

mass of chlorine = 2.62 grams

total compound mass = 2.62 + 1.37 = 3.99 grams

Substitute in the equation to get the mass % as follows:

mass % of chlorine = (2.62 / 3.99) * 100 = 65.6641604%