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how many grams of NH3 will have the same number of molecules as 27.7 g of C6H6? can anyone also explain how and why? thanks!?
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- ?Lv 76 years ago
C₆H₆ (benzene, I presume) has a molar mass of 78.1 g/mol. Divide this into the given mass to get the number of moles: (27.7 g)/(78.1 g/mol) = 0.355 mol.
The molar mass of NH₃ is 17.0 g/mol. Multiply this by the number of moles (0.355) to get the mass:
(0.355 mol)(17.0 g/mol) = 6.04 g.
(all quantities limited to 3 significant figures)
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