Chemistry Review

Scientific Notation

100

345600000

3.456 x 10⁸

200

0.00129

1.29 x 10^-3

300

0.0000000000456

4.56 x 10^-11

400

76820000000000

7.682 x 10¹³

500

167500000000000000000000000000

1.675 x 10²⁹

Significant Figures

100

456000

3

200

200.00

5

300

0.005789

4

400

29.00

4

500

2900

2

Rounding

100

8,632,051

millions place 

9,000,000

200

73,693

ten thousands place

70,000

300

347,168

ten thousands place

350, 000

400

1.7354948

hundred thousandths

1.73549

500

9.3113

thousandths place

9.311

Adding and Subtraction SN

100

9.87 x10^-2  +  5.00 x 10^-2

14.87 x 10^-2

200

(2.71 x 10²) - (1.52 x 10²)

1.493 x 10²

300

1.2 x 10⁵ + (5.35 x 10⁵)

6.55 x 10⁵

400

6.91 x 10^-2 +  (2.4 x 10^-2)

9.31 x 10^-2

500

3.67 x 10² + (1.6 X 10²)

5.27 x 10²

Multiplying and dividing SN

100

(4.3 x 10⁸) (2.0 x 10⁶)

8.6 x 10¹⁴

200

(6.0 x 10³)(1.5 x 10^-2)

9 x 10¹

300

(3.00 x 10²⁴) (6.02 x 10²³)

18.06 x 10⁴⁷

400

(5.71 x 10³)

_______________ 

(1.80 x 10^-2)

3.17 x 10⁵

500

(3.0 x 10^-2) 

_________________

(4 x 10^-3)

0.75 x 10¹