Please do each problem and explain how to get the answer! Have chem exam tomm! n

Question

Please do each problem and explain how to get the answer! Have chem exam tomm! need help ASAP!

A solution is prepared by dissolving 25.0 g of SrCl2 in water and diluting to a volume of 500 mL. What is the concentration of the resulting solution? 13.0 M 5.00 M 0.0500 M 0.315 M 31.5 M A solution containing 50 g of sugar in 500 g of water would: have a higher vapor pressure than pure water have a vapor pressure less than pure water boil at a temperature below 100 degree C freeze at a temperature above 0 degree C none of the above Relative to pure solvent, a solution containing a non-volatile solute has a vapor pressure and a boiling point. lower, higher lower, lower higher, lower higher, higher none of the above

Explanation / Answer

1.Molar mass of SrCl2 = 158.526 g/mol

Number of moles = 25gm/ 158.526gm = 0.1577

conc = 0.1577 moles / 0.5 L = 0.315 moles/Litre

2. since the sugar is an impurity it will reduce the vapour presseure of water. so ans = b

3. By the same explanation as 2, lower vapour pressure and higher boiling point

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