Question

Ascorbic acid, or vitamin C (C6H8O6, molar mass = 176 g/mol), is a naturally occurring organic compound with antioxidant properties. A healthy adult’s daily requirement of vitamin C is 70-90 mg. A sweet lime contains 2.82×10−4 mol of ascorbic acid.
To determine whether the ascorbic acid in a sweet lime meets the daily requirement, calculate the mass of ascorbic acid in 2.82×10−4 mol of ascorbic acid.

Answer 1

Answer:

The quantity of ascorbic acid found in sweet lime of 49.6 mg does not meet the daily requirement.

Explanation:

To determine the mass of ascorbic acid knowing the number of moles we use the following formula:

number of moles = mass / molecular weight

mass = number of moles × molecular weight

mass of ascorbic acid = 2.82 × 10⁻⁴ × 176

mass of ascorbic acid = 496 × 10⁻⁴ g = 0.0496 g = 49.6 mg

daily requirement of ascorbic acid = 70 - 90 mg

The quantity of ascorbic acid found in sweet lime of 49.6 mg does not meet the daily requirement.

Answer 2

Answer:

49.7 mg of Ascorbic acid do not meet the daily requirement.

Explanation:

The conversions are  

Moles to mass, by multiplying with molar mass.

Molar mass is the mass of 1 mole of the substance.

Its unit is gram per mole g/mol

Ascorbic acid ($C_6H_8O_6$) contains 6, C atoms 8, H atoms and 6, O atoms .

We find the molar mass of the compound by just adding the atomic mass of the atoms present in it

Molar mass of Ascorbic acid

$=(6\times 12.0107)+(8\times 1.00784)+(6\times 15.999)$

=176.124 g/mol(Given)

Mass of Ascorbic acid = Moles × Molar mass

$=2.82 \times 10^{-4} mol \times 176.124 g/mol$

=0.0497 g

We know

1 g = 1000 mg

So

$0.0497g \times 1000mg/1g=49.7mg$ VITAMIN C

The required quantity for an Adult is 70 to 90mg.

So 49.7 mg of Ascorbic acid do not meet the daily requirement.(Answer)