1. If 400 grams of C2H6O2 is added to 4,000 g of water, calculate the molality?

2. Calculate the molarity of a solution prepared by dissolving 6.80 grams of AgNO3 in 2.50 liters of solution.

1)1.61molkg-1

2)0.016M

Explanation:

1)we solve by using the formula for molality which mole of solute/Kg of solvent...

we convert 400g of C2H6O2 to mole and divide by 4000g(4kg)

c is the answer because when something is left after something evaporates that shows the chemical change.

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