Question 1

What is the correct measurement (with appropriate significant figures) for the length of the blue line shown on the ruler in the first image?

Accepted Answer

$$4.8\ 	ext{cm}$$

Question 2

Based on the beaker in the second image, what is the best estimate for the volume of liquid, using the correct number of significant figures?

Accepted Answer

$$48\ 	ext{mL}$$

Question 3

The mass displayed on the balance in the third image is 110.73 g. How many significant figures does this measurement have?

Accepted Answer

5

Question 4

What is the correct reading (with proper significant figures) for the volume in the graduated cylinder shown in the fourth image?

Accepted Answer

$$24.0\ 	ext{mL}$$

Question 5

In the fifth image (buret), what is the correct reading of the meniscus, using the appropriate number of significant figures?

Accepted Answer

$$25.60\ 	ext{mL}$$

Question 6

What is the correct volume (with proper significant figures) for the liquid in the beaker shown in the sixth image?

Accepted Answer

$$150\ 	ext{mL}$$

Question 7

Which measuring device from the images above provides the most precise measurement, and why?

Accepted Answer

The buret, because it allows measurement to the hundredths place and has 4 significant figures.

Question 8

Which measuring device from the images above provides the least precise measurement, and why?

Accepted Answer

The beaker, because its precision is to the tens place and it has only 2 significant figures.

Question 9

Refer to the set of four graduated cylinders in the last image. What is the correct reading (with proper significant figures) for the volume in cylinder 1?

Accepted Answer

$$22.0\ 	ext{mL}$$

Question 10

Refer to the set of four graduated cylinders in the last image. What is the correct reading (with proper significant figures) for the volume in cylinder 4?

Accepted Answer

$$11\ 	ext{mL}$$

Question 11

Why is it important to use scientific notation and significant figures in chemistry?

Accepted Answer

They ensure precision, accuracy, and clarity when working with very large or small numbers and reflect the limitations of measurement tools.

Question 12

A student records a mass as $$111\ 	ext{g}$$ using the balance shown in the third image. What is wrong with this measurement?

Accepted Answer

It does not reflect the full precision of the balance, which can measure to the hundredths place.

Question 13

If you add the following two measurements, $$4.8\ 	ext{cm} ($$from the ruler) and $$48\ 	ext{mL} ($$from the beaker), what is the correct way to report the sum, considering significant figures?

Accepted Answer

The sum should be reported as $$53 ($$rounded to the ones place, since both measurements are only precise to the tenths and ones place, respectively).

Question 14

Which of the following numbers has the greatest number of significant figures?

Accepted Answer

$$25.60$$

Question 15

A student reads the volume in a graduated cylinder as $$24.0\ 	ext{mL}. $$What does the zero in the tenths place indicate?

Accepted Answer

The measurement was estimated to the tenths place, showing the precision of the instrument.

Mastering Scientific Notation and Significant Figures in Chemistry

Guida di studio - Domande di pratica

Study guide - Flashcard