Also, Calculate the number of H- in 1.127 g CaH2.
I'll appreciate any help
2007-09-12 18:39:39 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Flying dragon has the right method but unfortunately given the wrong answer.
The question asks for the number of moles of Cl atoms not the number of atoms of Chlorine.
To get the answer. Work out mole as flying dragon has done. Then to find the number of moles of Cl you need to multiply this by 2 as there are 2 atoms of Cl in every molecule of C2H4Cl2
2007-09-12 19:05:32 · answer #1 · answered by ktrna69 6 · 0⤊ 0⤋
First, determine the molecular weight of the substance, then moles:
C2H4Cl2 is 98.9g/mol we have 0.956g/98.9g/mol =
0.00967 mole
Now multiply by Avigadro's number (and double it because there are 2 chlorines in each molecule of C2H4Cl2).
0.00967 x 6.02 x 10^23 x 2 = 1.16 x 10^22
The other one would be done the same way, I'll leave it for you to do.
Added:
OMG I'm sorry! I was doing this one at about 3:00 am; I must have had a total brain fart! I wonder who I should report to to have one of my medals taken away!
2007-09-12 18:57:32 · answer #2 · answered by Flying Dragon 7 · 0⤊ 0⤋
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2016-05-17 16:25:40 · answer #3 · answered by Anonymous · 0⤊ 0⤋