calculate the molarity when you dissolve 4.9g of K2Cr2O7 in 1000ml of water
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Answer:
grams of methanol, CH3OH, are dissolved in 100.0 g of water
a) Find the molality of the solution.
14g CH3OH X
1molCH3OH
32.0g
= 0.44 mol CH3OH
100.0g H2O X 1Kg
10
3g = 0.1000 Kg H2O
m =
0.44mol CH
3OH
0.1000Kg H2
O = 4.4 m
__________________________
b) Find the percent alcohol by mass in this solution.
g soln = 14g CH3OH + 100g H2O = 114 g soln
% mass =
14g CH3OH
114g soln
(100) = 12.3 %
Explanation:
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