KCET 2014 Chemistry Solved Paper

Mass of L-amino acid = 178 g
R−

C

| NH2

H−COOH

Na2/‌HCl

–––––––––>

0°C

N2
At STP, 1‌mol=22400cm3
1cm3=

1

22400

mol
So, 448cm3‌‌N2 is evolved when

448

22400

mol of amino acid reacted
Now, for L-amino acid,
Molar mass of amino acid
Sample of protein contains 0.25% amino acid, so 100 g of protein contain 0.25 g of amino acid. Therefore,
Molecular mass of protein =

100×89

0.25

=35600gmol−1