$$1 \text{ in} = 2.54 \text{ cm}$$

Question 1

Which of the following is the correct SI base unit for measuring the amount of substance?

Accepted Answer

Mole (mol)

Question 2

A student measures the mass of a sample as 0.0320 kg. How many significant figures are in this measurement?

Accepted Answer

3 significant figures

Question 3

Which glassware would be most appropriate for delivering a precise, fixed volume of liquid in a titration experiment?

Accepted Answer

Pipette

Question 4

Convert 2.5 kilometers to meters using metric prefixes.

Accepted Answer

$$2.5 	imes 10^3$ meters

Question 5

A cube has sides of length 1 decimeter (dm). What is its volume in liters?

Accepted Answer

$$1$$ liter

Question 6

Which of the following statements about significant figures is correct?

Accepted Answer

Zeros between nonzero digits are significant.

Question 7

A sample of platinum has a density of $$21.5 	ext{ g/cm}^3$$ and a volume of $$4.49 	ext{ cm}^3. $$What is its mass?

Accepted Answer

$$96.5 g$$

Question 8

Which temperature scale is based on absolute zero and is used in SI units?

Accepted Answer

Kelvin

Question 9

Express $$0.00840 in $$scientific notation with three significant figures.

Accepted Answer

$$8.40 	imes 10$$^{-3}$$

Question 10

Which of the following is an example of a derived SI unit?

Accepted Answer

Joule (J)

Question 11

A student adds $$2.62$$, $$11.5$$, and $$3.25$$ together. What is the sum rounded to the correct number of significant figures?

Accepted Answer

$$17.4$$

Question 12

Which of the following conversion factors would you use to convert inches to centimeters?

Accepted Answer

$$1 	ext{ in} = 2.54 	ext{ cm}$$

Question 13

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.

Question 14

How many seconds are there in one day?

Accepted Answer

$$86,400$$ seconds

Question 15

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

Accepted Answer

Micro-

Question 16

A student needs to convert $$1.63$$ liters to milliliters. What is the correct answer?

Accepted Answer

$$1630 mL$$

Question 17

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Question 18

If a measurement is given as $$6.80 	imes 10^2$, how many significant figures does it have?

Accepted Answer

3 significant figures

Question 19

Which of the following is the correct formula for density?

Accepted Answer

$$d = \dfrac{m}{V}$$

Question 20

A scientist wants to express the number $$5,900,000 in $$scientific notation with two significant figures. What is the correct answer?

Accepted Answer

$$5.9 	imes 10^6$

CHEM 200: Introduction to Matter, Energy, and Measurement (Chapter 1, Part 2)

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