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What is the mass of— (a) 1 mole of ni...

What is the mass of—
(a) 1 mole of nitrogen atoms?
(b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?
(c) 10 moles of sodium sulphite `(Na_(2)SO_(3))`?

Text Solution

Verified by Experts

(a) 1 mole of nitrogen (Al) atoms=27u
Mass of 1 mole of nitrogen (Al) atoms=14u
(b) 4 moles of aluminium atoms
Mass of 1 mole of aluminimum (Al) atoms=27u
Mass of 4 moles of aluminimum (Al) atoms=`4xx27=108u`
(c )10moles of sodium sulphide `(Na_(2)SO_(3))`
`"Mass of "Na_(2)SO_(3)=2xx"Atomic mass of Na"+"Atomic mass of S"+3xx"Atomic mass of O"`
`=2xx23+32+3xx16=126u`
1 mole of sodium sulphide has mass =126u
10 moles of sodium sulphide have mass `=10xx126=1260u`
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