Marcel just purchased 1.69 grams of iron fillings in order to make Living Putty for his 6 year old niece. How many moles of iron are made in his sample?

Ans: 0.0303 moles of iron are made in the sample

Given:

Mass of iron = 1.69 g

To determine:

moles of iron in the sample

Explanation:

Moles of iron = mass of iron/atomic mass

= 1.69 g/55.85 g. mol-1 = 0.0303 moles