Question

(a) Calculate the number of moles in 112 g of iron.; (b) Calculate the mass of 0.5 mole of sugar (C12H22O11).; [Atomic mass of Fe = 56 u, C = 12 u, H = 1 u, O = 16 u]

Answer 1

Answer:

A)

Molecular mass of Fe = 56

then no of moles = 112/56 = 2 moles

B)

One mole of sugar have [12(12)+1×22+(16)11] g mass = [144+22+176] = 342 g

then

Mass of 0.5 moles of sugar = 0.5×342 = 171 g

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Answer 2

Answer:

a)ni. of moles=112/56 moles

2 moles

b) mass of 1mole sugar=342g

0.5 mole sugar=1/2×342 g

171g

Explanation:

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