Q: Which of the following is the correct conversion factor to convert from square inches to square centimeters?

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

Question 1

Which of the following best explains why graphite and diamond, both made of carbon, have such different properties?

Accepted Answer

Their atoms are arranged in different geometric structures.

Question 2

Which of the following statements about the scientific method is correct?

Accepted Answer

A hypothesis is a tentative explanation that can be tested by experiments.

Question 3

Which of the following is an example of a chemical change?

Accepted Answer

Rusting of an iron nail.

Question 4

A sample of matter is uniform throughout and cannot be separated into simpler substances by physical means. Which classification best describes this sample?

Accepted Answer

Compound

Question 5

Which separation technique would be most appropriate to separate a mixture of sand and water?

Accepted Answer

Filtration

Question 6

Which of the following is an intensive property?

Accepted Answer

Density

Question 7

A student measures the mass of a lead block four times and gets values that are all close to each other but far from the true value. This is an example of:

Accepted Answer

Low accuracy, high precision

Question 8

Which of the following is the correct SI unit for temperature?

Accepted Answer

Kelvin (K)

Question 9

Convert 25.0 °C to Kelvin using the correct formula.

Accepted Answer

$$K = 25.0 + 273.15 = 298.15$$

Question 10

Which of the following numbers has three significant figures?

Accepted Answer

0.00320

Question 11

A student multiplies $$2.35 	imes 0.070$$ and gets $$0.1645. $$What is the answer rounded to the correct number of significant figures?

Accepted Answer

$$0.16$$

Question 12

Which of the following best describes the law of conservation of mass?

Accepted Answer

Matter is neither created nor destroyed in a chemical reaction.

Question 13

Which of the following is a derived unit in the SI system?

Accepted Answer

Liter (L)

Question 14

A sample of gasoline is burned in a car engine, releasing energy that moves the car forward. Which type of energy is primarily being converted to kinetic energy?

Accepted Answer

Potential energy

Question 15

Which of the following is the correct conversion factor to convert from square inches to square centimeters?

Accepted Answer

$$\frac{6.45 \ 	ext{cm}^2}{1 \ 	ext{in}^2}$$

Question 16

Which of the following is a physical property?

Accepted Answer

Boiling point

Question 17

A solution of salt water is an example of which type of matter?

Accepted Answer

Homogeneous mixture

Question 18

Which prefix multiplier represents $$10^{-6}$$?

Accepted Answer

Micro-

Question 19

A measurement is recorded as 1200. How many significant figures does this number have?

Accepted Answer

4

Question 20

Which of the following best describes the difference between accuracy and precision?

Accepted Answer

Accuracy is how close measurements are to the true value; precision is how close measurements are to each other.

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

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