Question

What is the mass of:
(a) 1 mole of nitrogen atom (N = 14)
(b) 4 moles of aluminium atoms (Al = 27)
(c) 10 moles of sodium sulphate? (Na = 23, S = 32, 0 = 16)

Answer 1

Answer:

Mass

• 1mole N =14g
• 4mole Al=108g
• 10mole sodium sulphate =710g

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Answer 2

Question :-

What is the mass of

(a) 1 mole of nitrogen atoms?

(b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27)?

(c) 10 moles of sodium sulphite (Na2S03)?

Answer :-

(a) Mass of 1 mole of nitrogen atoms = 14 g

(b) 4 moles of aluminium atoms

Mass of 1 mole of aluminium atoms = 27 g

∴ Mass of 4 moles of aluminium atoms = 27 x 4 = 108 g

(c) 10 moles of sodium sulphite (Na2SO3)

Mass of 1 mole of Na2SO3 = 2 x 23 + 32 + 3 x 16 = 46 + 32 + 48 = 126 g

∴ Mass of 10 moles of Na2SO3 = 126 x 10 = 1260 g

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