quiz mixtures

How many grams of sodium chloride are needed to make 15 L of a solution that has a concentration of 3.0 g per liter of solution?

45 g

A student is told to use 20.0 grams of sodium chloride to make an aqueous solution that has a concentration of 10.0 grams of sodium chloride per liter of solution. Assuming that 20.0 grams of sodium chloride has a volume of 7.5 milliliters, about how much water will she use in making this solution?

9.9925 L

Which has the most atoms? a mole of lead a mole of gold a mole of helium

All of the above have the same number of atoms.

Would you expect to find more dissolved oxygen in polar or tropical ocean waters? Why?

There would be more dissolved oxygen in the polar oceans because the solubility of oxygen in water decreases with increasing temperature

How would you classify the following material?coffee (black)

a solution

How would you classify the following material?milk

a suspension

Which of the following statements describes a saturated solution?

all of the above

Is the air in your house a homogeneous or heterogeneous mixture?

heterogeneous because of the dust particles it contains

Which of the following would be considered a heterogeneous mixture?vegetable oil milk water vinegar salad dressing

salad dressing

Which of the following would be considered a homogeneous mixture?

wine