The mass of a an atom of helium is 6.65 x 10^-24. Use scientific notation to express the mass of 250 helium atoms.

A) 1.6625 x 10-21

B) 1.6625 x 10-22

C) 1.6625 x 10-24

D) 1.6625 x 10-26

Question

Gregory Dunn

26 September, 13:29

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Answers (1)

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Flopsy · Answer 1

1.6625 x 10-21

mass of one helium atom x 250

Express 250 as 2.50.

(6.65 x 10-24) (2.50 x 102)

16.625 x 10 - 22

The mass of a an atom of helium is 6.65 x 10^-24. Use scientific notation to express the mass of 250 helium atoms.A) 1.6625 x 10-21B) 1.6625 x 10-22C) 1.6625 x 10-24D) 1.6625 x 10-26