Question

a)Calculate the number of moles present in i) 60g of Calcium
of oxygen atoms.[Given atomic mass of Ca-40u]
ii) 3.011X 1023 number
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Answer 1

Answer:

0.5 mol

Explanation:

Number of moles of Ca = Given mass of calcium / Molar mass of calcium = 60 / 40 = 1.5 moles

(b) Number of moles = Given number of molecules / 6.022×1023 = 3.011×1023 / 6.022×1023 = 0.5mol