Molarity

Which of the following is the correct formula for calculating molarity?

• moles/liters of solution

• moles/kg of solvent

• # particles/Avogadro's #

• theoretical yield/actual yield

Electrolytes

• don't conduct electricity

• conduct electricity

Since "like dissolves like", water and oil will not mix because

• both of them are polar

• both of them are nonpolar

• oil is polar and water is nonpolar

• oil is nonpolar and water is polar

How many grams of CaCl₂, are soluble in 100 g of water at approximately 17 ºC?

• 58 grams

• 70 grams

• 0 grams

• 12 grams

What is the molarity of 1 mole of Ba+ in 2 L of water

• 1 M
• 2 M
• .5 M
• .25 M

Tags

NGSS.HS-PS1-5

How many moles of Na₂CO₃ are there in 10.0 L of 2.00 M solution?

• .10 mol

• 20 mol

• 0.2 mol

• 10 mol

How many moles of Na₂CO₃ are in 10.0 mL of a 2.0 M solution?

• 2 mol

• 20 mol

• 0.02 mol

• 200 mol

Determine the molarity of 0.444 mol of CoCl₂ in 0.654 L of solution

• 0.679 M

• 12 M

• 0.6 M

• 6 M

How many moles of Na are needed to make 4.5 liters of a 1.5 M Na solution

• 4.24 mol

• 6.75 mol

• 3 mol

• 6 mol

When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:

• supersaturated
• unsaturated
• saturated