if bubba has a pile of barium chloride weighing 200 greams, how many grams of water are in the sample?
barium cloride formula is BaCl2*2H2O
* is a dot in the middle of the two but i cant find something to make it-.-
2007-12-12 01:26:47 · 2 answers · asked by Shayna M 1 in Science & Mathematics ➔ Chemistry
Molar Mass of BaCl2*2H2O = 244.3 g/mol
Mass of water in the formula = 2 * 18 = 36
Percentage of water in the formula = 36 / 244.3 = 14.7%
This tells you that 14.7% of your 200g is water.
Translate that sencence into a math equation.
0.147 x 200 = H2O
29.4 grams of water are in the 200g sample
2007-12-12 01:32:05 · answer #1 · answered by lhvinny 7 · 0⤊ 0⤋
Well, look at the other question you submitted, and solve that one. That will give you the percentage of water in the compound.
The percentage of water in the compound is equal to the grams of water in 100 grams of the BaCl2*2H2O. So, multiply that percentage by 2 to get the mass of water in 200 grams.
2007-12-12 09:36:06 · answer #2 · answered by hcbiochem 7 · 0⤊ 0⤋