Answer to Question #142600 in General Chemistry for Jay

Question

A sample of sodium has a mass Of 46 g. What is the mass Of the same number of calcium atoms as sodium atoms present in given sample ?

Answer 1

Moles of sodium = 46/23 = 2moles

1 mole of sodium contains 6.023×10²³ Atoms

2 moles contains 12.046×10²²³ atoms

So same number of calcium atoms means 2 moles of calcium.

Mass of calcium = 2×40 = 80 grams