The chemical formula of calcium chloride dihydrate is CaCl₂•2H₂O For every one mole of this substance, there are TWO moles of H₂O 2 moles of H₂O = (2)(18.016) = 36.032 g 1 mole of this substance = (40.08)+(2)(35.45)+(36.032) = 147.012 g Mass percent of H₂O in this substance = (36.032)/(147.012)x100 = 24.51%
He covers every type of question that might come on a unit 1 test in a packet of 9 pages W Mr. Farabaugh carrying me in Pre-AP Chemistry
Great and helpful video sir. I will have my first chemistry unit 1 test and your videos are fenomenal!
Hi Michael,
The link to the packet is not working. Could you please try to fix it? Thanks in advance.
I just tried that link, and it seems to work okay for me:
bit.ly/3z8RipZ
@@mrfarabaugh Thank you!
for question 21 why wouldnt u do just 18.016 why do u need to multiply by 2 since were only trying to find H2O not 2H2O
The chemical formula of calcium chloride dihydrate is CaCl₂•2H₂O
For every one mole of this substance, there are TWO moles of H₂O
2 moles of H₂O = (2)(18.016) = 36.032 g
1 mole of this substance = (40.08)+(2)(35.45)+(36.032) = 147.012 g
Mass percent of H₂O in this substance = (36.032)/(147.012)x100 = 24.51%
💕💕💕
36:47