Question

the cost of table sugar(C12H12O11) is RS 24 per kg. calculate its cost per mole​

Answer 1

Answer:

Let's first find the molar mass of sugar by adding up the atomic masses of all atoms in it.

Molar mass of sugar (C 12 H 22 O 11

) = (12 × 12) + (22 × 1) + (11 × 16) = 144 + 22 + 176 = 342 g/mol

Now, let's find out how many moles of sugar are in 1 kg, i.e. 1000 g sugar.

Number of moles =

mass /Molar mass= 1000/342 = 2.92 mol

It's given that 1 kg sugar costs Rs. 40

∴ Cost of 2.92 moles sugar = Rs. 40

Cost of one mole of sugar = 40/2.92 = 13.69 Rs. per mole

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Answer 2

Answer:

Let's first find the molar mass of sugar by adding up the atomic masses of all atoms in it.

Molar mass of sugar= (12 × 12) + (22 × 1) + (11 × 16) = 144 + 22 + 176 = 342 g/mol

Now, let's find out how many moles of sugar are in 1 kg, i.e. 1000 g sugar.

Number of moles = mass/Molar mass

= 1000/342 = 2.92 mol

It's given that 1 kg sugar costs Rs. 24

∴ Cost of 2.92 moles sugar = Rs. 24

Cost of one mole of sugar = 24/2.92 = 8.2 Rs. per mole