The formula for the ionic compound formed between calcium ions and chloride ions is CaCl2. What does this formula tell you about
the compound?
Each molecule of CaCl2 has one calcium ion and two
chloride ions.
Each calcium ion in the compound has exactly two chloride
ions bonded to it.
Calcium and chloride ions exist in a 1:2 ratio in a crystal of
CaCl2.
All of these are true.

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature