Q: Which of the following is the correct conversion factor for converting square inches to square centimeters?

$$1 \text{ in}^2 = 6.45 \text{ cm}^2$$

Question 1

Which of the following best describes the change that occurs when dry ice (solid CO$$_2) $$sublimes into gaseous CO$$_2$$?

Accepted Answer

A physical change, because the chemical composition of CO$$_2$$ remains the same.

Question 2

A student measures the mass of a sample as 5.01 g using a digital balance. How many significant figures does this measurement have?

Accepted Answer

3

Question 3

Which of the following is a homogeneous mixture?

Accepted Answer

Sugar water

Question 4

Convert 2.44 meters to centimeters.

Accepted Answer

$$2.44 	imes 10^2$ cm

Question 5

Which of the following is an example of an intensive property?

Accepted Answer

Density

Question 6

A chemist finds that 25.00 cm$$^3 of a $$liquid has a mass of 19.625 g at 20$$^	ext{o}C. $$What is the density of the liquid?

Accepted Answer

$$0.785$$ $$g/cm^3$

Question 7

Which of the following is the correct scientific notation for 0.00051274?

Accepted Answer

$$5.1274 	imes 10$$^{-4}$$

Question 8

A solution contains 30.00% potassium iodide by mass. How many grams of potassium iodide are in 40.0 g of solution?

Accepted Answer

$$12.0 g$$

Question 9

Which of the following is a derived SI unit?

Accepted Answer

Liter (L)

Question 10

A 747 is fueled with 173,231 L of jet fuel. If the density of the fuel is $$0.768 g/cm$^3$$, what is the mass of the fuel in kilograms? (1 L = 1000 cm$$^3)$$

Accepted Answer

$$133,900 kg$$

Question 11

Which of the following best describes the process of sugar dissolving in water?

Accepted Answer

A physical change, because the chemical composition of sugar remains unchanged.

Question 12

A student adds 12.5 + 3.269 - 5.12. What is the answer with the correct number of decimal places?

Accepted Answer

$$10.6$$

Question 13

Which of the following is the correct conversion factor for converting square inches to square centimeters?

Accepted Answer

$$1 	ext{ in}^2 = 6.45 	ext{ cm}^2$$

Question 14

A sample of water is decomposed into hydrogen and oxygen. If 100.0 g of water produces 11.1 g of hydrogen, how much oxygen is produced?

Accepted Answer

$$88.9 g$$

Question 15

Which of the following is the correct relationship between Celsius and Kelvin?

Accepted Answer

$$K = ^\circ C + 273.15$$

Question 16

A runner covers 7.5 km at a pace of 65 meters per minute. How many minutes does it take to complete the distance?

Accepted Answer

$$115$$ min$

Question 17

Which of the following is an example of a compound?

Accepted Answer

Water (H$$_2O)$$

Question 18

Which of the following is the correct number of significant figures in the measurement 0.050080 g?

Accepted Answer

5

Question 19

A solution contains 80.0 g of potassium iodide salt. If the solution is 30.00% potassium iodide by mass, what is the total mass of the solution?

Accepted Answer

$$267 g$$

Question 20

Which of the following best describes the accuracy and precision of Student C's measurements in the bar graph comparing three students' mass measurements?

Accepted Answer

Accurate and precise

Chapter 1: Matter, Measurement, and Problem Solving – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard