Calculate the number of moles in :a. 4g of NH4OH (n=14u,O=16u,H=1u) b. 0.5 g of CO2 (C=12u)
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a) No:of moles = given mass / molar mass
molar mass of NH4OH= 14+4*1+16+1=35
now n=4/35 moles
b) molar mass of co2=44
n=12/44=3/11
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