A sample of Na (sodium) has a mass of 46 gm what is the mass of ca atoms as sodium atoms present
in give sample (atomic weight Na=23; Ca=40)
(a) 46 gm
(b) 20 gm
(c) 40gm
(d) 80 gm
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Answer:
the mass of calcium is 80 gm
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Answered by
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Answer:
(d) 80 gm
Explanation:
1 mole = 6.022 x 10^23 = relative mass in grams
1 mole of Na = 6.022 x 10^23 = 23 gm
No. of moles in sample of Na = 46/23
= 2 moles
= 12.044 x 10^23 atoms
Therefore, the mass of ca atoms as sodium atoms present in give sample
=40 x 2
=80 gm
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