Question

the cost of table salt and table sugar are rupees 2 per kg and Rs 6 per kg respectively calculate their cost per mole​

Answer 1

Answer:

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Answer 2

Concept Introduction: A mole of a compound is calculated by calculating it's Molecular Weight.

Given:

We have been Given: Salt is Rs. 2 per kg and Sugar is Rs. 6 per kg

To Find:

We have to Find: Their costs per mole.

Solution:

According to the problem,

Salt:

One mole of NaCl is

$23 + 35.5 = 58.5 \: g$

therefore, cost of

$1g = \frac{2}{1000}$

therefore, Cost of 58.5g will be,

$\frac{2 \times 58.5}{1000} = \frac{117}{1000} = 0.117$

Sugar:

One mole of C12H22O11 is

$(12 \times 12) + (1 \times 22) + (16 \times 11) = 144 + 22 + 176 = 342g$

therefore cost of,

$1g = \frac{6}{1000}$

therefore, cost of 342g will be,

$\frac{6 \times 342}{1000} = \frac{2052}{1000} = 2.052$

Final Answer: The cost of Salt per mole is

$rs \: 0.117$

and The cost of Sugar per mole is

$rs \: 2.052$

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