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3 years ago

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.

Mathematics

2 answers:

olga55 [171]3 years ago

6 0

i took the test and it's actually A) 1.6625 x 10−21 :)

melisa1 [442]3 years ago

5 0

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

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