Question

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

Answer 1

The mass of sugar used is 427.5 grams.

Step-by-step 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=(Mass \ given \ in \ grams)/(Molar \ mass \ of \ molecule \ in \ grams)}`

`\textrm{Mass in grams}=\textrm{Mole} * \textrm{Molar mass of molecule in grams}`

`\textrm{Mass in grams}= 1.25*342`

`\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)