Review Quiz #1

Comment: Provide ALL correct answers for each problem.

The quizzes become increasingly more interesting. This quiz should take you about 20 minutes if you have good preparation. If you have difficulty with these topics, we STRONGLY recommend that you review the videos that we have listed.

Please remember, you are allowed a calculator AND a periodic table!

1. How many significant figures are in these measurements?

i. 18.2 cm          ii. 0.005 M          iii. 16.0020 sec          iv. 1.0000 min


2. Make the following conversion: 456 um = ____ meters
(u = micro)


3. Make the following conversion: 3.21 moles = ______ mmoles
(m = milli)


4. How many miles are there in 1000.0 meters (1 meter = 3.28 feet; 5280 feet = 1 mile)?


5. How many miles are in a light year (light travels at 186,000 miles per second)?


6. What is the density of a 25 gram stone that increases the water level in a graduated cylinder from 35 mL to 55 mL?


7. Make the following conversion:  32 psi = ____ mmHg
(760 mmHg = 14.7 psi)


8. A clean, empty flask weighs 35.78 grams. It is filled it with a product dissolved in solvent. The solvent is then evaporated and a small amount of product remains and the flask now weighs 37.45 grams. If the product MW = 278, how many moles of product were obtained?


9. How many atoms are present in 13 grams of magnesium (Mg Atomic Weight = 24.30 g/mol)?


10. What is the weight of 0.15 mole of glucose (C6H12O6)?

(atomic weights: C = 12 g; H = 1.0 g; O = 16 g)


11. What is your current status?