Question

1. which would most likely cause an increase in the energy of water molecules? a. cooling the water b. boiling the water c. adding salt to the water d. increasing the pressure on the water 2. a student added 15 ml of sodium chloride to 100 ml of water and then stirred the mixture until the salt was no longer visible. which of the following best describes the mixture? a. sodium chloride is the solute, water is the solvent, and salt water is the solution. b. sodium chloride is the solute, salt water is the solvent, and water is the solution. c. water is the solute, sodium chloride is the solvent, and salt water is the solution. d. water is the solute, salt water is the solvent, and sodium chloride is the solution. 3. anya fills a bucket with salt and sand. the contents of this bucket would best be classified as a. a solution b. a compound c. a homogeneous mixture d. a heterogeneous mixture 4. shawna investigates properties of matter. the answer to which question would best determine whether a substance is an element or a compound? a. what is the radius of each particle of the substance? b. does the substance contain more than one type of atom? c. was a chemical reaction necessary to create the substance? d. what is the electrical charge of the particles of the substance?

Explanation:

Step1: Analyze question 1

Increasing temperature increases molecular energy. Boiling water raises its temperature.

Step2: Analyze question 2

In a salt - water mixture, salt (sodium chloride) is dissolved in water. Solute is the dissolved substance, solvent is the dissolving substance, and the combination is the solution.

Step3: Analyze question 3

Salt and sand in a bucket are not uniformly mixed. A heterogeneous mixture has non - uniform composition.

Step4: Analyze question 4

Elements are made of one type of atom, compounds of more than one type.

Answer:

1. b. boiling the water
2. a. Sodium chloride is the solute, water is the solvent, and salt water is the solution.
3. d. a heterogeneous mixture
4. b. Does the substance contain more than one type of atom?