Terms
numbers...
curious
Significant
work it
100

a measure of how close a series of measurements are to one another.

What is Precision

100

What is the equation to calculate percent error?



100

why do we use scientific notation in chemistry?

Numbers are easier to work with.

100

How many significant numbers does 10200 have?

3

100

Multiply 5.04 X 1012 by 6.9 X 10-6

(5.04 x 6.9) x 10(12+-6)

34.776 x 10OR 3.5 x 107

200
The closeness of a measurement to its true value is a measure of its_________

What is accuracy

200

write 5703000000 in scientific notation

5.703 x 109

200

What is the value that is measured in the lab?

experimental value

200

How many significant numbers does 0.000006022 have?

4

200

complete the following math problem with correct sig. figs. and labels

34m +45.32m

79 m

300
Conversion factors are useful in solving problems in which a given measurement must be expressed.

What is dome other unit of measure

300

Write 56000000 in scientific notation

5.6 x 107

300

If the temperature of a piece of steel decreases, what happens to its density?

The density increases

300

How many significant numbers does 2000000502 have?

10

300

89.033m - 56.43 m=

32.60m

400

A ____ is a quantity that has both a number and a unit.

What is a measurement.
400

Write 0.0000750 in scientific notation

7.50 x 10-5

400

If the temperature changes by 100 K how much does it change in Co?

100o C

400

Round 200.5 km to 1 significant figure.

200 km

400

45.22 m x 9.3 m=

420 m2

500

Correct value based on reliable references.

What is Accepted value

500
Write 0.000000000384 in scientific notation

3.84 x 10-10

500

Which of these measurements are expressed to three significant figures?

.007 m or 7.3 X 10-7 km

7.3 x 10-7 km

500

Round 0.00071467 kg to two significant figures

0.00071 kg

500

209m x 4.444m=

929m2