Question 1

How many micrograms are in 65.3 kg?

Accepted Answer

A) 0.653 μg 
B) 6.53 × 107 μg 
C) 6.53 × 104 μg 
D) 6.53× 10−8 μg 
E) 6.53 × 1010 μg 
A) 0.653 μg 
B) 6.53 × 107 μg 
C) 6.53 × 104 μg 
D) 6.53× 10−8 μg 
E) 6.53 × 1010 μg

Question 2

Convert 8.513 × 105 mg/kL into units of ng/L.

Accepted Answer

A) 8.513 × 1011 ng/L 
B) 8.513 × 108 ng/L 
C) 8.513 × 102 ng/L 
D) 8.513 × 1014 ng/L 
E) 8.513 × 10−10 ng/L 
A) 8.513 × 1011 ng/L 
B) 8.513 × 108 ng/L 
C) 8.513 × 102 ng/L 
D) 8.513 × 1014 ng/L 
E) 8.513 × 10−10 ng/L

Question 3

Write the value 0.0000009620 in scientific notation.

Accepted Answer

A) 9.620 × 10−6 
B) 9.62 × 10−13 
C) 9.62 × 10−12 
D) 9.62 × 10+7 
E) 9.620 × 10−7 
A) 9.620 × 10−6 
B) 9.62 × 10−13 
C) 9.62 × 10−12 
D) 9.62 × 10+7 
E) 9.620 × 10−7

How many micrograms are in 65.3 kg?

Convert 8.513 × 10⁵ mg/kL into units of ng/L.

Write the value 0.0000009620 in scientific notation.

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Acids and Bases

Equilibrium

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Exam 4: How Chemists Use Numbers

How many micrograms are in 65.3 kg?

Convert 8.513 × 105 mg/kL into units of ng/L.

Write the value 0.0000009620 in scientific notation.

Atoms and Elements

Electrons and the Periodic Table

Compounds and Chemical Bonds

The Mole and Chemical Formulas

Molecular Shape

Solids, Liquids, and Phase Changes

Gases

Physical Properties of Solutions

Chemical Reactions and Chemical Equations

Using Balanced Chemical Equations

Acids and Bases

Equilibrium

Organic Chemistry

Biochemistry

Nuclear Chemistry

Electrochemistry

Filters

Convert 8.513 × 10⁵ mg/kL into units of ng/L.