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MichaelJoult MichaelJoult
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5 years ago
If the relative mass of a hydrogen atom is 1/4 that of a helium atom, how many helium atoms would you need to equal the mass of 200 hydrogen atoms?
A) 50
B) 200
C) 800
D) 4
E) 100
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withoutyoungwithoutyoung
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5 years ago
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MichaelJoult Author
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#2
5 years ago
Such a godsend, you helped me and my friend big time
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