Chemistry Measurement and Calculations

It's All About Sig Figs

100

589

What is three?

200

590

What is two?

300

590.

What is three?

400

0.00000056

What is two?

500

1.590 x 10^3

What is four?

Calculating with Sig Figs

100

Calculate and round correctly: 4.72×2.3

What is 11?

200

Calculate and round correctly: 30.6÷4.2

What is 7.3?

300

Calculate and round correctly: 12.4+3.27+0.856

What is 16.5?

400

Calculate and round correctly: 45.67−8.2

What is 37.5?

500

Calculate and round correctly: (15.2+3.47)÷2.60

What is 7.18?

Measurement

100

100

What is 3.73 meters?

200

200

What is 192.00 grams?

300

300

What is 30.0 mL?

400

400

What is 368 cm³?

500

500

What is -3.5 Celcius?

Dimensional Analysis

100

Convert 325 cm to meters  

What is 3.25 m?

200

8.41 g/mL to kg/L

What is 84.1 kg/L

300

7.68 cal/sec to kcal/min

What is 0.461 kcal/min

400

A vehicle travels at 60.0 mi/h. Convert this speed to inches per second.

What is 1,060 in/s ?

500

Traveling at 85 miles/hr, it would take this many minutes to travel 110 miles.

What is 78 minutes?

Learn The Lingo

100

This quality describes how close a number is to its true value.

What is accuracy?

200

This is the ratio between mass and the volume of an object.

What is density?

300

This is when you keep getting the same result (even if it is not the result that you want)

What is precision?

400

In the measurement 12.5 cm, the last digit is estimated rather than known exactly. What do we call that digit?

What is the uncertain digit?

500

A student measures a sample at 24.0 g, but its accepted mass is 25.0 g. The student calculates (24.0−25.0)÷25.0×100. What measurement term are they calculating?

What is percent error?