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State the no of neutrons in 1.6 g of methane ______?

Dear Student,
molar mass = 16 gm
16 gm = 1 mole 
1,6 gm= 116×1.6 =0.1moles
1 mole of methane has 6.023×1023 molecules 

so  0.1 moles have 0.1×6.023×1023 =6.023×1022 molecules 
1 molecule = 6 neutrons  (1 C has 6 neutrons , H has no neutrons)
so 6.023×1022 molecules have =6×6.023×1022  =3.6×1023 neutrons
Regards!

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MW of methane = 16 g/mole   So, no of moles of methane in 1.6 g = 1.6 /16 g/mole = 0.1 Since, in 1 mole methane there are 6.022 x 1023 molecules of methane,    so, in 0.1 mole there will be 0.1 x 6.022 x 1023 molecules of methane   In 1 methane molecule there are 10 electrons (6 + 4)   total electrons in 0.1 mole or 1.6 g = 10 x 0.1 x 6.022 x 1023  = 6.022 x 1023 
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NEUTRONS = 6.022 x 1023 
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i think  there is a mistake in the question pls check your question again.
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