A chemical change occurs when

a. Dissolved minerals freeze to form a crystal.

b. Ethanol is purified through distillation.

c. Salt deposits form from evaporated sea water.

d. A leaf changes color from green to red.

Suppose of lead (II) acetate is dissolved in of a aqueous solution of ammonium sulfate. Calculate the final molarity of acetate anion in the solution.

Which of the following is an element? a. zinc metal (zn) b. carbon monoxide gas (co) c. magnesium chloride salt (mgcl) d. hydrochloric acid (hcl) ?

If oxygen is removed from a sample of air as iron rusts, what happens to the partial pressure of oxygen in the air? A it increases B it decreases or C stays the same

What is the relationship between frequency and velocity of a wave direct inverse or no relationship

Question 17 What do you call the mixture that forms when salt is dissolved in water?

How many moles are in 10 grams of CaCl2?

Which is the correct formula for phosphorus pentachloride? PCl4 because a subscript of 4 indicates four Cl atoms PCl5 because a subscript of 5 indicates five Cl atoms P5Cl because a subscript of 5 indicates five P atoms P5Cl3 because a subscript of

Why are the elements in groups 3 to 12 often used to make dyes?

What is not needed for corrosion of metals? a. oxygen c. water b. ions d. sunlight

What force can move the oceans