Question

A chemist who is performing this reaction starts with 160.1 g of NH4NO3. The molar mass of NH4NO3 is 80.03 g/mol; the molar mass of water (H2O) is 18.01 g/mol. What mass, in grams, of H2O is produced?

Answer 1

80.0

Step-by-step explanation:

edge 2020

Answer 2

the answer
the general equation of the reaction is
NH4NO3 -------------- N2O + 2H2O

The molar mass of NH4NO3 is 80.03
The mass of NH4NO3 is 160.1 g
so we can deduce that

nNH4NO3 = number of mole of NH4NO3 = 160.1 g / 80.03 =2 moles
by using proportion property

NH4NO3 -------------- N2O + 2H2O
1mole 1mole 2 moles
nNH4NO3 nH2O

the number of mole nH2O can be found by

1/ nNH4NO3 = 2 / nH2O

nH2O = 2 x nNH4NO3 = 2 x 2 = 4 moles
to find the mass, we use

mH2O = 4 moles x 18.01 g /mol = 36 g