How many moles of n are in 0.187 g of n2o?

We know that the molar mass of N is 14 and O is 16, therefore the molar mass of N2O is:

molar mass N2O = 14 * 2 + 16 = 44 g/mol

The number of moles:

moles N2O = 0.187 / 44

moles N2O = 0.00425 mol

There are 2 moles of N per 1 mole of N2O hence:

moles N = 0.00425mol * 2

moles N = 0.0085 mol

b is the correct answer

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nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.