Question 1

Which digit is in the thousandths place in the number 12,345.6789?

Accepted Answer

7

Question 2

Round 3,284.659 to the hundreds place. What is the result?

Accepted Answer

3,300

Question 3

A blood test result shows 0.000142 grams per liter of lead. If the EPA limit is 0.00015 grams per liter, is the sample above or below the limit?

Accepted Answer

Below the limit

Question 4

Evaluate the following expression using the correct order of operations: $$8 + 3^2$

Accepted Answer

$$8 + 9 = 17$$

Question 5

Which key on a scientific calculator should you use to enter a negative number?

Accepted Answer

The change sign (+/−) key

Question 6

If $$ab = cde$$ and $$a = 4$$, $$c = 0.5$$, $$d = 0.08$$, $$e = 300$$, what is the value of $$b$$?

Accepted Answer

$$b = 3$$

Question 7

Which of the following best describes a direct relationship between two variables on a graph?

Accepted Answer

Both variables increase or decrease together

Question 8

Given the equation $$x^2y = 13$, solve for x$ in terms of y$.

Accepted Answer

$$x = \sqrt{\dfrac{13}{y}}$$

Question 9

A graph is titled 'Absorbance versus Concentration.' Which variable is plotted on the y-axis?

Accepted Answer

Absorbance

Question 10

What is the value of $$-24 	imes 3$$?

Accepted Answer

$$-72$$

Question 11

If you round 452.3 to the tens place, what is the result?

Accepted Answer

450

Question 12

Which of the following is the correct order of operations for evaluating $$6(-5 + 3) + 4^2$?

Accepted Answer

Evaluate $$-5 + 3$$, then multiply by 6, then $$4^2$$, then add

Question 13

On a graph showing 'Amount of Product versus Time,' the amount of product levels off after 2.5 minutes. What does this indicate about the reaction?

Accepted Answer

No more product is being formed

Question 14

Which of the following is true about negative exponents?

Accepted Answer

They indicate repeated multiplication of the reciprocal

Question 15

What is the value of $$12^2$$?

Accepted Answer

144

Question 16

If a graph shows 'Temperature versus Heat Added' and both variables increase together, what type of relationship is this?

Accepted Answer

Direct relationship

Question 17

Which of the following is the correct way to isolate $$z in $$the equation $$\dfrac{y}{z} = x$$?

Accepted Answer

$$z = \dfrac{y}{x}$$

Question 18

What is the (x, y) value of a point on a graph where the x-axis is labeled 'Concentration (M)' and the y-axis is labeled 'Absorbance (%)', and the point is at 2 M and 20%?

Accepted Answer

(2, 20)

Question 19

Which of the following is NOT a correct step when rounding a number?

Accepted Answer

Always round up, regardless of the digit

Question 20

A scientist measures the temperature of a reaction every minute and plots the results. Which variable is the independent variable?

Accepted Answer

Time

Essential Math Skills for Introductory Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard