Ch.2 and 5 Measurements & Calculations

Significant Figures

100

What you use to measure to a certain digit amount so you do not have unceratain numbers. 

What is significant figures?

200

The number of sig. figs. in the following number

518

What is 3 sig. figs.?

300

For the measurement 0.817 m, the digit that is estimated.

*think about what is looks like to take measurements on a meter stick*

What is 7?

400

The final answer of the following problem correctly reflecting the number of significant figures/decimal places.

5.50 - 2.1 = ?

What is 3.4?

*adding/subtracting- the least number of decimal places

500

The final answer of the following problem correctly reflecting the number of significant figures/decimal places.

0.005763 / 0.0251 = ?

What is 0.230?

Scientific Notation

100

Convert 3,180 to scientific notation.

What is 3.18 x 10³?

200

Convert 0.00920 to scientific notation.

What is 9.20 x 10^-3?

300

Convert the following to decimal notation. Your answer should contain the correct number of significant figures. 

3.6 x 10⁴

What is 36000?

400

Convert the following to decimal notation. Your answer should contain the correct number of significant figures.

1.20 x 10-3

What is 0.00120?

500

Convert the following to decimal notation. Your answer should contain the correct number of significant figures.

3.39 x 10⁶

What is 3390000?

1 unit dimensional analysis

100

18.0 cm to meters

100cm=1m

What is 0.180 meters?

200

1.25m to km

1000m=1km

What is 0.00125km

300

3.62 grams to centigrams

100cg=1g

What is 362 centigrams?

400

456 dm3 to cm3 

1000cm3=1dm3

What is 456,000 cm³?

500

50.0 L to mL

1L=1,000mL

What is 50,000mL

2 unit dimensional analysis

100

52.0 kg/dm³ to mg/cm³

1kg=1,000,000mg

1dm³= 1cm³

What is 5.20 x 10⁴ mg/cm³

200

2.0 kg/L to mg/mL

1kg=1,000,000mg

1L=1,000,000mL

What is 2.0mg/mL

300

956 mg/cm³ to g/m³

1g=1,000mg

100cm³= 1m³

What is 95.6

400

0.640 g/mL to kg/L

1000g=1kg

1000mL=1L

What is 0.640 kg/L?

500

65.0 cm³/sec to dm³/min

1cm³= 10dm³

60sec=1min

What is 39,000 dm³/min?

Mixture and properties

100

What physical property allowed you to seperate out the iron in the Mixture lab?

What is Magnatism?

200

What physical property did you take advantage of to seperate out the gravel in the mixture lab? 

What is particle size

300

List two physical properties. (Can not be answers to other questions)

Answers may vary.

400

What physical property would you take advantge of to seperate water from ethanol? 

Boiling Point using distillation

500

What is the % composition of each thing below

Mixture- 8.123g

Gravel-2.343g

Iron- 1.234g

Salt-0.453g

Sand-4.093g

28.844% Gravel

15.191% Iron

5.577% Salt 

50.388% Sand