Five mineral samples of equal mass of calcite, caco3 (mm 100.085) , had a total mass of 10.9 ± 0.1 g. what is the average mass of calcium in each sample? (assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.)

The molecular mass of calcite is 100.085 (given).

Atomic mass of calcium = 40.078 amu

Percent amount of calcium in calcite = %

The total mass of five mineral samples =  (given)

So, the mass of one sample =

and

The average mass of calcium in sample =

and

Hence, the average mass of calcium in each sample is .

explanation:

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