Write the chemical formual the followin compounds and also calcuate their formula write mass
(a) Baking soda (b) Caustic soda (c )Common salt (d) Magnessium (e )Sodium carbonate.

Explanation

Baking soda `(NaHCO_(3))`
`"Formula units mass"="Atomic mass of Na"+"Atomic mass of H"+"Atomic mass of C"+3xx"Atomic mass of O"`
(b) Caustic soda `"Formula unit mass"="Atomic mass of Na"+"Atomic mass of O"+"Atomic mass of H"=23+16+1=40u`
(c )Common salt (NaCl)
`"Formulae unit mass"="Atomic mass of Na"+Aromic mass of Cl"=23+35.5=58.5u`
(d) Magnesium sulphate `(MgSO_(4))`
`"Formulae unit mass"="Atomic mass of Mg"+"Aromic mass of S"+4xx"atomic mass of O"=24+32+4xx"atomic mass"`
`=24+32+4xx16=120u`
(e )Sodium carbonate `(Na_(2)CO_(3))`
`"Formulae unit mass"=2xx"Atomic mass of Na"+"Aromic mass of C"+3xx"atomic mass of O"=24+32+4xx"atomic mass of O"`
`=2xx23+12+3xx16=106u`