Q: A laboratory technician needs to convert 2.5 kilometers to centimeters. Which of the following is the correct calculation?

$$2.5 \times 10^5$ \text{ cm}$$

Q: Which of the following is the correct equivalence statement for volume?

$$1 \text{ dm}^3 = 1 \text{ L}$$

Q: A hospital has 125 deciliters of blood plasma. What is the volume in milliliters?

$$1.25 \times 10^3$ \text{ mL}$$

Q: A scientist needs to convert 8.00 meters to inches. Which conversion factors should be used in sequence?

$$1 \text{ m} = 100 \text{ cm}$$, then $$1 \text{ in.} = 2.54 \text{ cm}$$

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 laboratory technician needs to convert 2.5 kilometers to centimeters. Which of the following is the correct calculation?

Accepted Answer

$$2.5 	imes 10^5$ 	ext{ cm}$$

Question 3

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

Accepted Answer

Micro ($$\mu)$$

Question 4

A student measures the temperature of boiling water as 100°C. What is this temperature in Kelvin?

Accepted Answer

$$373.15 	ext{ K}$$

Question 5

Which of the following statements about accuracy and precision is correct?

Accepted Answer

Accuracy refers to how close measurements are to the true value, while precision refers to how close measurements are to each other.

Question 6

A cube has a length of 2.00 cm on each side. If the density of gold is $$19.32 	ext{ g/cm}^3$$, what is the mass of the cube?

Accepted Answer

$$77.3 	ext{ g}$$

Question 7

Which of the following is an example of an exact number?

Accepted Answer

There are 12 eggs in a dozen

Question 8

A graduated cylinder is used to measure the volume of a liquid. Which statement best describes the accuracy of the measurement?

Accepted Answer

The more graduations on the cylinder, the more accurate the measurement.

Question 9

A student records the following masses for a sample: 3.52 g, 3.56 g, 3.49 g, and 3.51 g. The actual mass is 2.50 g. Which target diagram best represents this data?

Accepted Answer

Poor accuracy, good precision

Question 10

Which of the following numbers has three significant figures?

Accepted Answer

2.39

Question 11

When multiplying $$7.3 	ext{ cm} by$$ $$0.002 	ext{ cm}$$, how many significant figures should the answer have?

Accepted Answer

1

Question 12

A sample of mercury has a mass of $$1.00 	imes 10^2$ 	ext{ g}$$ and occupies a volume of $$7.36 	ext{ cm}^3. $$What is the density of mercury?

Accepted Answer

$$13.6 	ext{ g/cm}^3$$

Question 13

Which of the following is the correct equivalence statement for volume?

Accepted Answer

$$1 	ext{ dm}^3 = 1 	ext{ L}$$

Question 14

A hospital has 125 deciliters of blood plasma. What is the volume in milliliters?

Accepted Answer

$$1.25 	imes 10^3$ 	ext{ mL}$$

Question 15

Which instrument would you use to deliver a specific, fixed volume of liquid most accurately?

Accepted Answer

Volumetric flask

Question 16

A scientist needs to convert 8.00 meters to inches. Which conversion factors should be used in sequence?

Accepted Answer

$$1 	ext{ m} = 100 	ext{ cm}$$, then $$1 	ext{ in.} = 2.54 	ext{ cm}$$

Question 17

Which of the following is the correct scientific notation for 0.0000478?

Accepted Answer

$$4.78 	imes 10$$^{-5}$$

Question 18

If a measurement is reported as $$27 \pm 1 	ext{ °C}$$, what does the '± 1' represent?

Accepted Answer

The uncertainty in the measurement

Question 19

Which of the following is NOT a base SI unit?

Accepted Answer

Liter (L)

Chapter 1: Introduction to Matter, Energy, and Measurement – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard