Chem 1211 Quiz 1 !!!

Vocabulary

100

Extensive property...

depends on amount of substance. 

ex: mass, volume, length 

200

A Pure substance

is a substance made of only one type of atom, or only one type of molecule ( group of atoms bonded together)

ex: element, compound 

300

Chemical Property

a property of something that will be change while observing. 

ex: oxidative, flamibility

400

Figure 1 on board shows...

Accuracy 

500

Figure 2 on board shows...

precision

Sig Figs

100

1261.63 has how many sig figs

6

200

0.42000 has how many sig figs

5

300

600 has how many sig figs

1 

400

Find the answer using the correct number of signifigant figures:

34.683 + 58.930 + 68.35112

161.964

500

Find the answer using the correct number of sig figs

 6.90 / 2.8952

 2.38

Dimensional Analysis

100

8.43 cm = ? millimeters

84.3 mm

200

34.5yr = ? hrs

3.02x10^5hrs

300

1.445 x 104 m = ? km

14.45 km

400

How many cubic centimeters (1 cm3 = 1mL) of carbon dioxide gas are in 1.4 liters?

1,400 cm3

500

The acceleration due to gravity on the surface of Uranus is 8.83 m/s2. What is this expressed in km/min²?

31.788 km/min²

Temperature Conversions

100

45.3C =? F

114F

200

506.2K = ?C

233.05 C

300

-459.67F = ?K

0K

400

Aluminum metal melts at 660.37 °C. What is the temperature in Kelvin?

933.52 K

500

Oxygen has a boiling point of 90.19 K. What is the temperature in Fahrenheit ?

-297.3 F

Scientific Notation

100

Write in Scientific Notation: 

0.00000000147

????1.47x10^-9

200

Write out the following number: 

1.2 x 10^-5

0.000012

300

Write in correct scientific notation:

0.0038 x10²

3.8 x10^-1

400

8 x10³ + 6.45x10⁴

7.25x10⁴

500

(7.76 x10^-4) (5.8 x 10^-7) 

4.501 x10^-10