Question

which will have a higher mass a) 0.500 mole of zinc or b) 0.250 mole of lead​

Answer 1

Answer:

0.500mole of zinc

Explanation:

because 500gram of iron is greater than 250gram of aluminium

Answer 2

Answer:

0.250 mole of lead​ has higher mass than 0.500 mole of zinc

Explanation:

• The molar mass of a substance is defined as the sum of masses of the atoms of the molecule.
• Since, Zinc molecule contains only one atom of Zinc, the molar mass of Zinc is the atomic mass of Zinc itself. We can get the atomic mass of Zinc from the periodic table. Hence Molar mass of Zinc = 65.38gm/mole.

Mass of 1 mole of Zinc = 65.38gm

• Since, Lead molecule contains one atom of Lead, the molar mass of Lead is the atomic mass of Lead itself. From the periodic table molar mass of Lead = 207.20gm/mole

Mass of 1 mole of Lead = 207.20gm

We have, Mass of 1 mole of zinc = 65.38gm/mole

Mass of  0.500 mole of zinc = 65.38 ×0.500 = 32.69gm

Again, Mass of 1 mole of Lead = 207.20gm

Mass of 0.250 mole of lead​ = 207.20 ×0.250 = 51.8gm

∴  0.250 mole of lead​ has higher mass than 0.500 mole of zinc.

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