Question 1

Which of the following best describes the difference between the 'minus' and 'negative' buttons on a scientific calculator?

Accepted Answer

The 'minus' button is used for subtraction, while the 'negative' button is used to change the sign of a number.

Question 2

A patient needs a total of 700 mL of blood transfused. If they have already received 300 mL, how many more 100 mL bags are needed? Use the equation $$700 = 100x + 300.$$

Accepted Answer

2

Question 3

Which of the following calculations correctly applies the rule for subtracting a negative number?

Accepted Answer

$$6 - (-3) = 9$$

Question 4

What is $$4 	imes 10$$^{-4}$$ written in standard decimal notation?

Accepted Answer

0.0004

Question 5

A NICU has 5 boys and 8 girls. What percent of the babies are male? Use $$\frac{	ext{number of boys}}{	ext{total babies}} 	imes 100\%.$$

Accepted Answer

38\%

Question 6

Which of the following is the correct scientific notation for 97,000?

Accepted Answer

$$9.7 	imes 10$$^{4}$$

Question 7

Convert 0.00045 grams to scientific notation.

Accepted Answer

$$4.5 	imes 10$$^{-4}$$

Question 8

Which of the following best explains why scientific notation is used in chemistry?

Accepted Answer

It allows us to easily express very large or very small numbers without writing many zeros.

Question 9

What is the result of $$-2 	imes -3$$?

Accepted Answer

6

Question 10

Which of the following is the correct way to convert 0.0074 to scientific notation?

Accepted Answer

$$7.4 	imes 10$$^{-3}$$

Question 11

A calculation is performed as $$12 / 4 + 2. $$According to the correct order of operations, what is the result?

Accepted Answer

5

Question 12

Which of the following is the correct solution for $$3x + 4 = 10$$?

Accepted Answer

$$x = 2$$

Question 13

If you move the decimal three places to the right to convert a small number to scientific notation, what is the exponent?

Accepted Answer

-3

Question 14

Which of the following is the correct scientific notation for the diameter of a hydrogen atom, $$0.000000000025$$ meters?

Accepted Answer

$$2.5 	imes 10$$^{-11}$$

Question 15

Which of the following is the correct way to express 2,480 in scientific notation?

Accepted Answer

$$2.48 	imes 10$$^{3}$$

Question 16

A negative exponent in scientific notation means:

Accepted Answer

The decimal moves to the left, making the number smaller.

Question 17

Which of the following is the correct solution for $$7x = 14$$?

Accepted Answer

$$x = 2$$

Question 18

If you have 4 out of 7 parts, what percent is this?

Accepted Answer

57\%

Question 19

Which of the following is the correct way to express 245 in scientific notation?

Accepted Answer

$$2.45 	imes 10$$^{2}$$

Question 20

Which of the following is the correct result for $$2 	imes -3$$?

Accepted Answer

-6

Key Math Skills and Scientific Notation for Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard