Question

A chemist needs 1.25 moles of sugar to dissolve in 1 liter of water how many grams of sugar needed

Answer 1

Answer:

The mass of sugar used is 427.5 grams.

Explanation:

The formula of common sugar is $\mathrm{C_{12}H_{22}O_{11}}$.

Its molar mass of molecule is 342 grams per mole.

The number of moles of sugar used is equal to '1.25'

$\mathbf{Mole=\frac{Mass \ given \ in \ grams}{Molar \ mass \ of \ molecule \ in \ grams}}$

$\textrm{Mass in grams}=\textrm{Mole} \times \textrm{Molar mass of molecule in grams}$

$\textrm{Mass in grams}= 1.25\times342$

$\mathbf{Mass \ in \ grams=427.5 g}$

(NOTE : You can calculate molar mass by adding the mass of all the atoms present in the atom.

Mass of Oxygen (O) = 16  ;  Total number of Oxygen atoms present = 11

Mass of Hydrogen (H) =1  ;  Total number of Hydrogen Atoms present = 22

Mass of Carbon (C) = 12   ;  Total number of Carbon atoms present = 12

Total mass of molecule = 12 × 12 + 1 × 22 + 16 × 11 = 342)