An unknown amount of barium nitrate is dissolved in 120.0 g of water and 8.15 g of copper (II) sulfate is dissolved in 75.0 g of water. When these solutions are mixed 1.076 g of white solid is isolated as a precipitate by vacuum filtration. The filtrate is found to have a mass of 204.44 g. What mass of barium nitrate was dissolved in the water and used for this reaction

The amount of dissolved barium nitrate is 2.366 g

Explanation:

let the amount of dissolved barium nitrate = x

The reaction is given as;

Before reaction:

Mass of barium nitrate solution = (x + 120) g

Mass of copper sulphate solution = (8.15 + 75)g

After reaction:

mass of residue = 1.076 g

mass of filtrate = 204.44 g

Apply the law of conservation of energy;

Total mass before reaction = total mass after reaction

(x + 120) + (8.15 + 75) = 1.076 + 204.44

x + 203.15 = 205.516

x = 205.516 - 203.15

x = 2.366 g

Therefore, the amount of dissolved barium nitrate is 2.366 g

the answer is b & c i believe : )

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.