What is the mass of 5x10 to the 15th power CH4 molecules?

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Ugh I really need help on that one, anyone?

2007-09-30 13:19:39 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

Atomic weights: C=12 H=1 CH4=16

5x10^15molecules x 1molCH4/6x10^23molecules x 16gCH4/1molCH4 = 1.3 x 10^-7g

2007-09-30 13:28:20 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋

(5 x 10)^15

or

5 x 10^5 ?

first one is 3.15 times 10^25. second one is 500,000

2007-09-30 13:24:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋