2 years ago

21)

Chemistry

1 answer:

RSB [31]2 years ago

8 0

It would be letter a

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How mant grams are there in 7.15 x 10^24 molecules of water?

worty [1.4K]

Answer:

B. 214.02

Explanation:

1 mol of water weighs 18.015 gm and contains 6.023 × 10²³ molecules

From question, We have 7.15 × 10²⁴ molecules

Dividing we get (7.15 × 10 ²⁴) ÷ ( 6.023 × 10²³) = 11.871 molecules

Now, Weight of water = 11.871 × 18.015 = 213.85 which is nearer to option B

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