SOLUTION: A uranium atom has a mass of 3.95× 10^−22 grams. A sample of uranium has a mass of 9.085×10^−1 grams. Determine how many atoms are in the sample using scientific notatio

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Question 1204458: A uranium atom has a mass of 3.95× 10^−22 grams. A sample of uranium
has a mass of 9.085×10^−1 grams. Determine how many atoms are in
the sample using scientific notation?
Ⓐ 2.3× 10^−23
Ⓑ 2.3 × 10^21
Ⓒ 3.6 × 10^−22
Ⓓ 3.6 × 10^20
Found 2 solutions by Alan3354, mananth:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A uranium atom has a mass of 3.95× 10^−22 grams. A sample of uranium
has a mass of 9.085×10^−1 grams. Determine how many atoms are in
the sample using scientific notation?
--------------------
n = 9.085e-1/3.95e-22 = (9.085/3.95)e21
= 2.3e21 or 2.3*10^21
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= 2,300,000,000,000,000,000,000 atoms

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
(9.085*10^(−1))/ (3.95* 10^(−22))
9.085/3.95)*(10^22/10^1)

2.303797*10^21