Which phrase best describes a chemical reaction? A. mixing two substances B. the combustion of a substance C. forming or breakin

To start, consult the periodic table to pinpoint the element with an average atomic mass of 24.3. The amu is simply the number listed under the element, leading us to conclude that Mg is the answer.

Step : To find the mass of a single washer, divide the total measured mass by the number of washers . Step : Convert kilograms to milligrams knowing ; thus resulting in the final answer .