Determine the molecules mass of:
`(i) NH_(4)OH`
(ii) `K_(2)CO_(3)`
`CH_(3)COOH`
Given atomic masses: `"Here", 1.0u, O=16.0u, C=12.0, K=39.0u, N=14.0u`

Explanation

Moecular mass of `NH_(4)OH`
`="Atomic mass of N"+5xx("Atomic mass of H")+"Atomic mas of O"`
`=14+5xx1+16=14+5+16=35u`
(ii) Molecular mass of `K_(2)CO_(3)`
`2xx("Atomic masss of K")+"Atomic mass of C"+3+("Atomic mass of O")`
`=2xx39+12+3xx16=138u`
(iii) Molecular mass of `CH_(3)COOH`
`=2xx("Atomic mas of C")+4xx("Atomic amss of H")+2xx("Atomic masss of O")`
`=2xx12+4xx1+2xx16=60u`