1. An antacid tablet containing 0.50 g of NaHCO₃ is dissolved in 250 mL of water.

What is the molar concentration of NaHCO₃ in the solution?

2. How many of the numbers below have 5 significant figures?

0.0054

19.000

0.00006

1.6090 × 10⁸13607

3. Which of the following would be the correct name for N2O3?

4. How many grams of calcium bromide are in 50.0 mL of a 0.25 M calcium bromide solution?

5. How many atoms of carbon are in 24 grams of carbon?

 

 

6. What is the formula for Iron(III) sulfite?

 

7. Assume that you are a physician administering a drug in a solution containing 5.0 mg drug/L solution.

If the recommended dosage of the drug is 3.5 × 10^-6 g per kilogram of body weight, what volume of solution would you prescribe daily for a 68 kg patient?

 

8. The balanced chemical equation for the reaction between PCl5 and water is given below.

If 3.45 moles of HCl are produced, how many moles of water reacted?

PCl₅ + 4 H₂O → H₃PO₄ + 5 HCl

9. A solution is prepared by dissolving sugar in water.

The solution is 25.0%, by mass, sugar.

How many grams of WATER are in 472 grams of this solution?

10. How many moles of C₄F₈ are in 265 grams of C₄F₈?