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What is the mass of 4.900 x 10^25 atoms of He

What is the mass of 4.900 x 10^25 atoms of He
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What is the mass of 4.900 x 10^25 atoms of He

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User LanceH
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  1. mass?atoms=4.900x10,25,of helium mass=atoms x molarmass divided by NA [6.022x1023] we will get or answer
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User Astex
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