Q: A bullet found at a crime scene contains 13.9 g of lead, 0.3 g of tin, and 0.9 g of antimony. What is the percentage of tin in the bullet? (Express your answer to the ones place.)

$$\frac{0.3\ \mathrm{g}}{15.1\ \mathrm{g}} \times 100\% = 2\%$$

Q: A bullet from a suspect’s ammunition contains 11.6 g of lead, 0.5 g of tin, and 0.4 g of antimony. What is the percentage of antimony in this bullet? (Express your answer to the ones place.)

$$\frac{0.4\ \mathrm{g}}{12.5\ \mathrm{g}} \times 100\% = 3\%$$

Question 1

A nurse records a patient's pulse as 30 beats/min during an emergency room assessment. According to the scientific method, this action is best classified as:

Accepted Answer

an observation

Question 2

A student reads a chemistry chapter twice and works all the problems at the end of each section. According to learning strategies, what additional step would most improve their long-term retention?

Accepted Answer

Waiting a few days and retesting on the problems

Question 3

Which of the following is the best example of a hypothesis in the context of the scientific method?

Accepted Answer

A nurse thinks that a red and swollen incision is infected.

Question 4

Which of the following activities should NOT be included in a study plan for learning chemistry successfully?

Accepted Answer

Waiting to study until the night before the exam

Question 5

A bullet found at a crime scene has a mass of 15.24 g. What is the place value of the digit 2 in this measurement?

Accepted Answer

Tenths

Question 6

A bullet contains 0.925 g of lead. What is the place value of the digit 5 in this measurement?

Accepted Answer

Thousandths

Question 7

A bullet found at a crime scene contains 13.9 g of lead, 0.3 g of tin, and 0.9 g of antimony. What is the percentage of tin in the bullet? (Express your answer to the ones place.)

Accepted Answer

$$\frac{0.3\ \mathrm{g}}{15.1\ \mathrm{g}} 	imes 100\% = 2\%$$

Question 8

A bullet from a suspect’s ammunition contains 11.6 g of lead, 0.5 g of tin, and 0.4 g of antimony. What is the percentage of antimony in this bullet? (Express your answer to the ones place.)

Accepted Answer

$$\frac{0.4\ \mathrm{g}}{12.5\ \mathrm{g}} 	imes 100\% = 3\%$$

Question 9

A nurse administers Tylenol to a child with a fever. According to the graph of body temperature versus time, what is the child’s temperature 15 minutes after Tylenol was given?

Accepted Answer

$$37.6\ ^\circ\mathrm{C}$$

Question 10

How many minutes after Tylenol was given did the child’s temperature decrease to $$38.0\ ^\circ\mathrm{C}$$, according to the graph?

Accepted Answer

8 min

Question 11

Which of the following is the correct scientific notation for the number 0.000016?

Accepted Answer

$$1.6 	imes 10$$^{-5}$$

Question 12

Which of the following is the correct scientific notation for the number 425,000?

Accepted Answer

$$4.25 	imes 10$$^{5}$$

Question 13

Which of the following study strategies is most likely to help you learn chemistry effectively?

Accepted Answer

Working problems as you read a section

Question 14

Which of the following best describes the vertical axis on a graph showing the effect of Tylenol on a child’s fever?

Accepted Answer

Body temperature, in degrees Celsius

Question 15

Which of the following is the correct way to solve for $$V_2 in $$the equation $$P_1$$ $$V_1$$ = $$P_2$$ $$V_2$$?

Accepted Answer

$$V_2$$ = \frac{$$P_1$$ $$V_1$$}{$$P_2$$}$$

Question 16

A student wants to improve their chemistry exam score. Which of the following strategies is LEAST effective?

Accepted Answer

Reading the chapter the night before the exam

Step-by-Step Guidance for GOB Chemistry Study Questions

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