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Chemistry Questions-Please show all steps to get the answer

Chemistry Questions-Please show all steps to get the answer
1. What mass of sucrose (C12H22O11) would you combine with 5.00 x 10 square grams of water to make a solution with an osmotic pressure of 8.55atm at 298 K? (Assume aa density of 1.0 g/mL for the solution).

2. Calculate the freezing point and boiling points
a. 10.5g FeCl3 in 1.50 x 10 square grams water
b. 3.5% KCl by mass (in water)
c. 0.150 m MgF2

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