What amount of Na2CO3.10H2O will contains same no. of neutrons as the no. of ions in 100g of plumbic pyrophosphate [PbP2O7]? (Pb = 208, P = 31, Na = 23)
Answers
Answered by
2
Explanation:
Formula unit mass of Na
2
CO
3
= 2×atomic mass of Na+1×atomic mass of C+3×atomic mass of O
=2×22.98+1×12.01+3×16
=105.97u
Formula unit mass of 10H
2
O=10×atomic mass of H
2
O
=10×18.02
=180.02u
Formula unit mass of Na
2
CO
3
.10H
2
O=105.97+180.02
=285.99u
Answered by
0
Answer:
Explanation:
1 mole of sample (Na 2 CO 3 ) contains 2 moles of Na + ions.
Moles of Na + ions= Total no. of Na + ions
No. of ions in one mole of Na +
ion
=
6.022×10
23
6.022×10
23
=1 mole
∴ Moles of sample=
2
1
=0.5 moles.
∴ Mass of sample= No. of moles×Molecular mass
=0.5×[(23×2)+12+(16×3]]
∴ Mass of sample= 53 grams
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