Question

calculate no. of atoms in 11.5g of sodium and 15g of calcium

Answer 1

here's answer.

11.5 g of sodium.

nu. of mole=11.5÷23= 1/2mole

atom in 1 mole..=6.02×10 ki power 23.

atom in 1/2 mole = 3.01 × 10ki power 23.

15 g of calcium.

nu of mole = 15 ÷40= .375

atoms in .375 mole= 2.25 × 10ki power 23.

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