Chem math week practice test questions

How many sig. fig. are in the number below:
350.540

• 4
• 5
• 6
• 7

Which measurement contains 3 sig figs?

• 200 mL
• 20.0 mL
• 0.02 mL
• 0.020mL

Round 1047.78 to three sig figs

• 104
• 105
• 1050
• 1050.00

For addition or subtraction, the number of sig figs in the answer is determined by _____

• the number with the most figures after the decimal point
• the number with the fewest figures after the decimal point
• the total number of figures after the decimal point
• the number of trailing zeros

For multiplication, just make sure the answer has the same sig figs as _____

• your last number
• your most precise measurement
• your least precise measurement
• your first number

Find the sum 3.35 + 1.4 + 3.65

• 8.9
• 8.22
• 8.43
• 8.4

0.495 g - 0.001 g = ?

• 0.394 g

• 0.3984 g

• 0.494 g

• 0.5 g

Solve & Round to Correct Sig Figs.
4.5 x 2.34 = 

• 11
• 10.52
• 10.5
• 10

Calculate 1.23 m x 0.89 m and give your answer with the appropriate number of significant figures.

• 1.0 m²
• 1.1 m²
• 1.0947 m²
• 1.09 m²

What is the correct answer according to sig fig rules:

.005612 x .40145 =

• .0022

• .00225

• .002252

• .002253