Q: A human hair is about $$8 \times 10$$^{-6}$$ meters thick. If you line up 100,000 hairs end to end, what is the total length in meters, expressed in scientific notation?

$$8 \times 10$$^{-6}$$ \times 1 \times 10$$^{5}$$ = 8 \times 10$$^{-1}$$

Question 1

Which of the following correctly expresses the number 0.0000016 in scientific notation?

Accepted Answer

$$1.6 	imes 10$$^{-6}$$

Question 2

A human hair is about $$8 	imes 10$$^{-6}$$ meters thick. If you line up 100,000 hairs end to end, what is the total length in meters, expressed in scientific notation?

Accepted Answer

$$8 	imes 10$$^{-6}$$ 	imes 1 	imes 10$$^{5}$$ = 8 	imes 10$$^{-1}$$

Question 3

Which of the following is the correct scientific notation for the number 3500?

Accepted Answer

$$3.5 	imes 10$$^{3}$$

Question 4

Convert 0.00730 to scientific notation.

Accepted Answer

$$7.3 	imes 10$$^{-2}$$

Question 5

A chickenpox virus has a diameter of $$0.0000003$$ meters. Express this value in scientific notation.

Accepted Answer

$$3 	imes 10$$^{-7}$$

Question 6

Which of the following numbers is equivalent to $$1 	imes 10$$^{3}$$?

Accepted Answer

$$1000$$

Question 7

If a calculator displays $$2.4E3$$, what is the value in standard notation?

Accepted Answer

$$2,400$$

Question 8

Which of the following is the correct scientific notation for the number 0.000086?

Accepted Answer

$$8.6 	imes 10$$^{-4}$$

Question 9

Express $$978 	imes 10$$^{5}$$ in standard notation.

Accepted Answer

$$97,800,000$$

Question 10

Which of the following is the correct scientific notation for the number 0.021?

Accepted Answer

$$2.1 	imes 10$$^{-2}$$

Question 11

A sample contains $$2.4 	imes 10$$^{3}$$ bacteria. If each bacterium has a mass of 1$$ 	imes $$10^{-12}$$ grams, what is the total mass of bacteria in grams, expressed in scientific notation?

Accepted Answer

$$2.4 	imes 10$$^{-9}$$

Question 12

Which of the following is the correct scientific notation for the number 86,000?

Accepted Answer

$$8.6 	imes 10$$^{4}$$

Question 13

Which of the following is the correct scientific notation for the number 0.0003?

Accepted Answer

$$3 	imes 10$$^{-4}$$

Question 14

A scientist measures a cell diameter as $$2.1 	imes 10$$^{-5}$$ meters. How would this value be written in standard notation?

Accepted Answer

$$0.000021$$

Question 15

Which of the following is the correct scientific notation for the number 0.000000021?

Accepted Answer

$$2.1 	imes 10$$^{-9}$$

Question 16

If a calculator displays $$8.6E-4$$, what is the value in standard notation?

Accepted Answer

$$0.00086$$

Question 17

Which of the following is the correct scientific notation for the number 0.000000086?

Accepted Answer

$$8.6 	imes 10$$^{-8}$$

Question 18

A scientist records a measurement as $$6.4 	imes 10$$^{3}$$ grams. What is this value in standard notation?

Accepted Answer

$$6,400$$

Question 19

Which of the following is the correct scientific notation for the number 21,000?

Accepted Answer

$$2.1 	imes 10$$^{4}$$

Question 20

A biologist estimates that there are $$1 	imes 10$$^{5}$$ cells in a sample. If each cell contains 2$$ 	imes $$10^{-9}$$ grams of DNA, what is the total mass of DNA in grams, expressed in scientific notation?

Accepted Answer

$$2 	imes 10$$^{-4}$$

Scientific Notation in Chemistry: Chapter 1 Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards