Exam 1- Significant Figures (practice)

2

How many sig figs in 0.0000099 s?

1

How many sig figs in 2000 kWh?

4

How many sig figs in 38.15 cm?

4

How many sig figs in 4.0070x1011 kg?

3

How many sig figs in 4.970× 105?

0.0938

Round to 3 sig figs: 0.0937583

26.4

Round to 3 sig figs: 26.43598

Multiplication and Division

Which operation results in a final answer that is limited by value with the fewest significant figures? (Multiplication and Division or Addition and Subtraction)

Significant

All non-zero digits (2531), zeros, between non-zero numbers (interior zeros), trailing zeros with a decimal point (1000.). (Significant or not significant?)

Not Significant

Trailing zeros without a decimal point (50000), leading zeros in a decimal number (0.00034). (Significant or not significant?)

11.150 g

What is the answer with the correct number of sig figs? 11.0010 g + 0.0100 g + (0.2500 × 53.51 g )÷ 96.0 = 11.15034895833 g

12 cm

What is the answer with the correct number of sig figs? 3.489 cm × (5.67 cm - 2.3 cm) = 11.75793

After PEMDAS

When do you round using signifiant figures in an equation with multiple steps using order of operations? (Before PEMDAS or After PEMDAS)

Addition and Subtraction

Which operation results in a final answer that is limited by the value with the largest absolute uncertainty limited by decimal place? (Multiplication and Division or Addition and Subtraction)