Q: A student measures the mass of a sample as 0.500 kg. How many grams is this?

$$0.500 \times 1000 = 500$$ grams

Q: Which of the following is the correct conversion factor to convert yards to inches?

$$1 \text{ yard} = 36 \text{ inches}$$

Q: A student needs to convert 2.45 ounces to grams. (1 oz = 28.35 g) What is the correct answer?

$$2.45 \times 28.35 = 69.46 g$$

Q: Which of the following is the correct formula for density?

$$\text{density} = \frac{\text{mass}}{\text{volume}}$$

Question 1

Which of the following statements best describes the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object, while weight measures the force with which gravity pulls on an object.

Question 2

A student measures the mass of a sample as 0.500 kg. How many grams is this?

Accepted Answer

$$0.500 	imes 1000 = 500$$ grams

Question 3

Which of the following is NOT a fundamental SI unit?

Accepted Answer

liter (L)

Question 4

A sample of gold has a mass of 38.6 g and a volume of 2.00 cm$$^3. $$What is its density?

Accepted Answer

$$\frac{38.6}{2.00} = 19.3 g/cm$^3$$

Question 5

Which temperature scale has 0 as the absolute zero?

Accepted Answer

Kelvin

Question 6

Convert 22.4 fluid ounces to milliliters. (1 fl oz = 29.57 mL)

Accepted Answer

$$22.4 	imes 29.57 = 663 mL$$

Question 7

Which of the following best describes precision in measurement?

Accepted Answer

How well a number of independent measurements agree with each other.

Question 8

A student records the following measurements for the mass of a tennis ball: 54.44 g, 54.41 g, 54.45 g. The true mass is 54.44 g. What can be said about the student's measurements?

Accepted Answer

High accuracy and high precision

Question 9

Which of the following is a derived SI unit?

Accepted Answer

joule (J)

Question 10

What is the correct formula for kinetic energy?

Accepted Answer

$$E_k = \frac{1}{2}mv^2$

Question 11

Which of the following statements about significant figures is TRUE?

Accepted Answer

Zeros at the end of a number and after the decimal point are always significant.

Question 12

A measurement is recorded as 0.00450 g. How many significant figures does it have?

Accepted Answer

3

Question 13

Which of the following is the correct conversion factor to convert yards to inches?

Accepted Answer

$$1 	ext{ yard} = 36 	ext{ inches}$$

Question 14

A student needs to convert 2.45 ounces to grams. (1 oz = 28.35 g) What is the correct answer?

Accepted Answer

$$2.45 	imes 28.35 = 69.46 g$$

Question 15

Which of the following is an example of a systematic error?

Accepted Answer

A scale that is not calibrated and always reads 0.5 g too high.

Question 16

Which of the following is the correct formula for density?

Accepted Answer

$$	ext{density} = \frac{	ext{mass}}{	ext{volume}}$$

Question 17

Which of the following is an intensive property?

Accepted Answer

Density

Question 18

A student multiplies 2.976 by 0.07426. How many significant figures should the answer have?

Accepted Answer

3

Question 19

Which of the following is the correct exponential notation for 1,990,000?

Accepted Answer

$$1.99 	imes 10^6$

Question 20

Which of the following best describes a hypothesis in the scientific method?

Accepted Answer

A tentative proposal that explains observations.

Chemical Tools: Experimentation and Measurement – Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard