Find the no. Of molecules of 4.25g ammonia

1.	Find the no. Of molecules of 4.25g ammonia
Answer» Molar mass NH3 = 14+3 = 17g/mol4.25g = 4.25/17 = 0.25 molNH3 1mol = 6.022 {tex}\\times {/tex}1023 molecules0.25 mol = 0.25 {tex}\\times{/tex}6.022 {tex}\\times {/tex}1023Number of molecules = 1.51 {tex}\\times{/tex}1023\xa0

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