Conversions In Chemistry

Metric Units

1

Metric base unit for length

meter

2

Derived unit using length, width and height.

Liter

3

1 kilogram = ? grams

1000g

4

456 mL = ? L

0.456 L

5

A sample of water has a mass of 500 grams and a volume of 400 mL. What is the density of the sample in g/mL?

1.25 g/mL

6

To travel from New York City to Boston would be 0.35 Megameters.  What is this distance in millimeters?

350,000,000 mm 

or 

3.5 x 10^8 mm

Rounding

1

1.6 L rounds to what value with one digit?

2L

2

323.1 g rounds to what value with 3 digits?

323 g

3

0.0987 Km rounds to what value with 2 nonzero digits?

0.099 Km

4

22.0 mm. *  5.1 mm. =

110 mm2

5

89.765 g - 40.0 g =

49.8 g

6

A student needs to calculate the average of the following reaction rates.  What is the average?

15.678 Bubbles / s

14.892   Bubbles /s

16.00 Bubbles /s

15.45 Bubbles /s

17.1 Bubbles /s

15.8 Bubbles /s

Scientific Notation

1

10 to the 0 power equals?

1

2

11.1 m in Scientific Notation is

1.11 x 10^1 m

3

6.45 x 10^ - 4 L equals what in standard/common notation?

0.000645 L

4

(71.44 x 10 ^ - 2g) + (6.9  x 10^ - 2g) equals what in Sci Notation? 

7.8 x 10 ^ -1 g

5

6.3699 x 10 ^ 2 g / 3.00 x 10 ^ - 2L 

 equals what in Sci Notation

2.12 x 10 ^4 g/L

6

One Carbon atom has a mass of 12 amu.  What would the mass be of 602,000,000,000,000,000,000,000 carbon atoms.  

Express answer in Scientific Notation.

3.15 x 10^ -22 amu

Significant Figures

1

How many Sig Figs in 12.3 m

3

2

How many Sig Figs in 1005.36 g

6

3

How many Sig Figs in 0.00978L

3

4

How many Sig Figs in 300 m

1

5

How many Sig Figs in the answer for: 

2300 m + 10,124.6 m?

2

6

How many significant figures in the answer to the following problem:

What is the mass of 305,000,000,000 pennies if each penny has a mass of  2.5346 g ?

7.77 x 10^11 grams

3 Significant Figures

Conversions using DA

1

Convert 3500 milliliters (mL) to liters (L).

3.5 L

2

Convert 783.54 L to kL

0.78354 kL

3

How many US dollars equals 56.46 pounds if:

1.17 US Dollars = 1 Euro

1.14 Euro = 1 Pound

75.31 US dollars

4

Convert 52.1 weeks to minutes

525000 min. 

or 

5.25 x 10 ^5 min

5

Convert 20.0 miles per hour (mi/h) to meters per second (m/s).

8.94 m /s

6

A rock has a mass of 7.984 kg and has a volume of 3.5 L.  What is the Density of the rock in mg/mL?

2300 mg / mL

or

2.3 x 10^3 mg / mL