8.461 x 1024 atoms of calcium is equal to moles of calcium.

8.461 x 10²⁴ atoms of calcium is equal to 14.1 moles of calcium.

CALCULATE MOLES FROM NUMBER OF ATOMS:

no. of moles = no. of atoms ÷ 6.02 × 10²³

no. of moles = 8.461 x 10²⁴ ÷ 6.02 × 10²³

no. of moles = 8.461/6.02 × 10²⁴-²³

no. of moles = 1.41 × 10¹

no. of moles = 14.1 moles.

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The answer to your question is: 3.82 moles of Calcium

Explanation:

Data

8.461 x 10²⁴ atoms Ca

                                   1 mol of Ca 6.023 x 10²³ atoms

                                   x                   8.461 x 10²⁴ atoms

                                  x = (8.461 x 10²⁴ x 1) / 6.023 x 10²³

                                 x = 3.82 moles of Calcium

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moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

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