Chemistry Notes
Chemistry 200 Exam 1 Review Problems
1. Calculate the number of atoms in 10.0 grams of Fe.
2. Give the mass number, #protons, #neutrons and #electrons for the isotope strontium-88.
3. Calculate the number of moles of carbon in 50.0 g of benzene C6H6
4. A substance is found to be 38.7 % C, 9.7 % H and 51.6 % O by mass. Its molar mass is 62.1 g/mole. What is its molecular formula?
5. Name the following:
a) Ca(OH)2 b) KCN c) HClO4(aq) d) FeSO4 e) Na2O
f) SF6 g) MgSO4 ( 2H2O h) Na2O2
6. What are the formulas of the following compounds?
a) sodium sulfite b) potassium permanganate c) calcium sulfide
d) aluminum hydroxide e) mercury (II) phosphate
f) tetraphosphorus trisulfide g) nitrous acid
7. Which of the following is not an example of a chemical change?
a) converting gasoline to carbon dioxide and water
b) digesting starch to give glucose
c) grinding sucrose crystals into powdered sugar
d) smoking tobacco
e) generating carbon dioxide from baking soda and vinegar
8. The density of ethyl alcohol is 0.789 g/mL. What is the volume of 35.5 grams of ethyl alcohol ?
9. How many significant figures are in the mass measurement 0.050 gram?
10. If an automobile engine has a volume of 155 in3, what is the volume in cm3 ? (2.54 cm = 1 in exactly)
11. Convert 25 μL into milliliters
12. If 5.58 g of powdered iron react with powdered sulfur to produce 8.79 g of iron sulfide, what is the mass of reacting sulfur?
13. Sodium chloride, table salt, melts at 801°C. What is the melting point on the Fahrenheit scale ?
14. Express this number in scientific notation: 0.00104 centimeter
15. What is the mass in kilograms of a beaker that weighs 101 grams?
16. Convert 12 g(cm2/s2 to Joules (kg(m2/s2)
17. A 1.013 g sample of a hydrate, ZnSO4 ( X H2O is dissolved in pure water and the sulfate ion is precipitated by adding an excess of barium chloride solution. The mass
1. Calculate the number of atoms in 10.0 grams of Fe.
2. Give the mass number, #protons, #neutrons and #electrons for the isotope strontium-88.
3. Calculate the number of moles of carbon in 50.0 g of benzene C6H6
4. A substance is found to be 38.7 % C, 9.7 % H and 51.6 % O by mass. Its molar mass is 62.1 g/mole. What is its molecular formula?
5. Name the following:
a) Ca(OH)2 b) KCN c) HClO4(aq) d) FeSO4 e) Na2O
f) SF6 g) MgSO4 ( 2H2O h) Na2O2
6. What are the formulas of the following compounds?
a) sodium sulfite b) potassium permanganate c) calcium sulfide
d) aluminum hydroxide e) mercury (II) phosphate
f) tetraphosphorus trisulfide g) nitrous acid
7. Which of the following is not an example of a chemical change?
a) converting gasoline to carbon dioxide and water
b) digesting starch to give glucose
c) grinding sucrose crystals into powdered sugar
d) smoking tobacco
e) generating carbon dioxide from baking soda and vinegar
8. The density of ethyl alcohol is 0.789 g/mL. What is the volume of 35.5 grams of ethyl alcohol ?
9. How many significant figures are in the mass measurement 0.050 gram?
10. If an automobile engine has a volume of 155 in3, what is the volume in cm3 ? (2.54 cm = 1 in exactly)
11. Convert 25 μL into milliliters
12. If 5.58 g of powdered iron react with powdered sulfur to produce 8.79 g of iron sulfide, what is the mass of reacting sulfur?
13. Sodium chloride, table salt, melts at 801°C. What is the melting point on the Fahrenheit scale ?
14. Express this number in scientific notation: 0.00104 centimeter
15. What is the mass in kilograms of a beaker that weighs 101 grams?
16. Convert 12 g(cm2/s2 to Joules (kg(m2/s2)
17. A 1.013 g sample of a hydrate, ZnSO4 ( X H2O is dissolved in pure water and the sulfate ion is precipitated by adding an excess of barium chloride solution. The mass