Homework 3/4/02, 3/05/02

Regular Chemistry

Name: _______________________

Section: _______________________

Grade: ___________/20

1. How many grams of potassium chloride are there if there is 4.3 moles of potassium chloride present?

2. With 3.45 grams of Zinc oxide, how many moles are present?

3. What is the mass of 0.650 mol of P₂O₅?

4. While putting in your marble countertop in your kitchen you come across information stating that 14.65 X 10²³ formula units of calcium carbonate. How many moles of CaCO₃ is that?

5. Determine the number of atoms in 7.65 mol B.

6. How many moles of sodium carbonate (Na₂CO₃) contain 8.9 X 10²⁴ formula units?

7. To make chocalate chip cookies, you need 150 grams of table sugar (C₁₂H₂₂O₁₂). How many sucrose molecules will be in the cookies?

8. How many formula units of NaHCO₃ are in 1.8 g of sodium bicarbonate (baking soda)?