The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this distance in scientific notation.

The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m. Express this distance in scientific notation.



A) 1.72 × 10- 9 m

B) 1.72 × 10-10 m

C) 0.172 × 10-10 m

D) 17.2 × 9 m

E) 1.72 × 10 m



Answer: B


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