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Solve problem: Arjun purchased 250 g of glucose (C6H12O6) for Rs 40. Find the cost of glucose per mole. - Chemistry

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प्रश्न

Solve problem:

Arjun purchased 250 g of glucose (C6H12O6) for Rs 40. Find the cost of glucose per mole.

बेरीज
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उत्तर

Given: Mass of glucose = 250 g, cost for 250 g glucose = Rs 40, molecular formula of glucose = C6H12O6

To find: Cost per mole of glucose

Calculation: Molecular formula of glucose is (C6H12O6).

Molecular mass of glucose
= (6 × Average atomic mass of C) + (12 × Average atomic mass of H) + (6 × Average atomic mass of O)
= (6 × 12 u) + (12 × 1 u) + (6 × 16 u)
= 180 u
∴ Molar mass of glucose = 180 g mol−1
Number of moles = `"Mass of a substance"/"Molar mass of a substance"`
= `(250 "g")/(180"g  mol"^-1)`

= `250/180` mol
Now,
`250/180` mol of glucose cost = Rs 40
1 mol glucose cost = x
∴ x = `(40xx180)/250`

= Rs 28.8/mol of glucose

The cost of glucose per mole is Rs 28.8.

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पाठ 1: Some Basic Concepts of Chemistry - Exercises [पृष्ठ १२]

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बालभारती Chemistry [English] Standard 11 Maharashtra State Board
पाठ 1 Some Basic Concepts of Chemistry
Exercises | Q 4. (F) | पृष्ठ १२

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