Unit 1 Test Review

Le Basics

100

How many sig figs in 67?

two 

200

convert 5,100,000 to scientific notation

What is 5.1 x 10^{6 ?}

300

I have two-fourths of a tomato. How many sig figs is this?

What is two?

400

I have 20. versus 20. Do these have the same amount of sig figs and why or why not?

No - because the decimal changes the precision. 

500

Perform the calculation... 

2.10 x 10³ / 3.0 x 10⁵

0.0070

Metric System Stuff

100

What is the prefix for making something 1000 times bigger?

what is a kilo?

200

Convert 10 kiloliters to liters

10,000 liters 

300

Convert 15.60061 hectometers to kiloliters

1.56 kiloliters

400

A student entered a 10.0 kilometer run. How long is the run in miles? 

Hint: 1 m = 1.094 yards; 

1760 yards = 1 mile 

6.22 miles 

500

A Korean car is advertised as having a gas mileage of 15 km/L. Convert this rating to miles per gallon.

1.094 yards = 1 meter

1 mile = 1760 yards

1 L = 1.06 quarts 

4 quarts = 1 gallon

35 miles per gallon

All ze formulas

100

What is the formula for Density?

D = m/V

200

what is the formula for percent error?

actual - measured / actual 

300

A sample containing 33.42 g of metal pellets is poured into a graduated cylinder initially containing 12.7 mL of water - raising the water to 21.6 mL. Calculate the density of the metal. 

3.8 g/mL

400

We measure the length of an olympic swimming pool. The actual length is 50 yards. 

We measure 25, 25.3, 25.2, and 25.4 yards. What best describes our measurements? 

Precise, but not accurate 

500

What has the greater mass, 15.0 mL of mercury or 1 L of water?

density of water = 1.00

density of mercury = 13.6

water

Actual Chemistry!

100

what is avogadro's number?

6.02 x 10²³ atoms / molecules / particles

200

what is the molar mass of lithium?

6.941 g /mol

300

How many moles of cobalt metal do we have if our sample contains 5.00 x 10²⁰ atoms of cobalt metal?

8.30 x 10^-4 moles of Cobalt metal

400

What is the molar mass of Carbonate (CO₃)?

60 grams / mole 

500

We have 0.00568 grams of Silicon. Convert this to atoms. 

1.22 x 10²⁰ atoms 

Lab Stuff

100

What is the name of the plastic lab equipment that we have used to measure volume?

what is a graduated cylinder?

200

You spill vinegar on the lab bench. What type of chemical should you use to neutralize this?

A base (baking soda)

300

Correctly and precisely measure 35.5 mL of water. 

Have to measure meniscus, on flat surface and eye level. 

400

I make the party lit (LIT-erally, get it?...) what am I?

A striker

500

name the five safety features of this classroom.

fire extinguisher, fire blanket, fume hood, eye wash and safety shower