Chemistry Math

A scientist estimated that a procedure would yield 150g of product, but the experiment actually produced 165g. What was the percent error in the scientist's estimate?

• 9%

• 10%

• 11%

• 15%

A baker calculated that she would need 2.5 kg of flour for a recipe, but she actually needed 2.75 kg. What was the percent error in her calculation?

• 9.09%

• 10%

• 10.91%

• 11.11%

How many significant figures are in the number? 2804 m

• 3

• 4

• 5

• unknown

How many significant figures are in the number? 75,000 m

• 2

• 3

• 5

• unknown

How many significant figures are in the number? 4.06 x 10^-5 m

• 3

• 7

• 5

• unknown

How many significant figures are in the number? 0.003068 m

• 6

• 5

• 4

• unknown

What is 78.5 rounded to one significant figure?

• 79

• 78.5

• 70

• 80

• 78

Round 1,296,717 to 3 significant figures

• 1,290,000

• 1,296,000

• 1,297,000

• 1,300,000

• 1.30 x 10⁶

The metric base unit for volume is ____

• gram, g

• Liter, L

• meter, m

The metric base units for length is

• gram

• liter

• meter