How many molecules of C5H10 would you have if you have 5.51 mol? Report your answer with 3 significant figures and in scientific notation.?

[匿名]

2018-02-07 1:32 pm

I know how to find the amount of atoms. But not the amount of molecules. I would really appreciate some help.

How many molecules of C5H10 would you have if you have 5.51 mol? Report your answer with 3 significant figures and in scientific notation.

I also have another question that again, I know how to find it in mol's, but not in grams. Question below:

Consider a 9.42 g sample of C2H2. How many atoms of C would be in this sample? Report your answer with 3 significant figures and in scientific notation. Use * for the multiplication symbol and ^ for the exponent.

回答 (1)

不用客氣

2018-02-07 2:04 pm

Each mole of C₅H₁₀ contains 6.022 × 10²³ molecules.

No. of molecules in 5.51 mol C₅H₁₀ = (5.51 mol) × (6.022 × 10²³ molecules./mol) = 3.32 × 10²⁴ molecules

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