Question

the molar mass of oxalic acid is a. 126u. b. 126g/mol. c. 12.6 d. 12. 6 g/mol​

Answer 1

Answer:

Oxalic acid, Molar mass 90.03 g/mol

Answer 2

Answer:

The correct answer is option (b)126g/mole

Explanation:

The chemical formula of oxalic acid is $C_2H_2O_4.$

It usually occurs as the oxalic acid dihydrate with two water molecules

The chemical formula of oxalic acid dihydrate is  $C_2H_2O_4. 2H_2O$ or

$C_2H_6O_6$

Oxalic acid dihydrate contains 2 atoms of carbon, 6 atoms of hydrogen, and 6 atoms of Oxygen

The atomic mass of Carbon = 12g/mole

The atomic mass of Hydrogen = 1g/mole

The atomic mass of Oxygen = 16g/mole

Hence the molar mass of Oxalic acid dihydrate = (2×12)+(6×1)+(6×16)

=24+6+96

=126g/mole

∴ The molar mass of oxalic acid is 126g/mol

The correct answer is option (b)

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