Question 1

What is the result of the following multiplication expressed in scientific notation to the correct number of significant figures? (5.46 x 10³)(8.0 x 10^-3) A) B) C) D) E)

Accepted Answer

The answer of What is the result of the following...

Question 2

How many significant figures are in the measurement 0.2010 g?
A) 1
B) 2
C) 3
D) 4
E) 5

Accepted Answer

A significant figure is any digit that is known with certainty plus one digit that is uncertain. In this measurement, all digits are known except for the last one, which is uncertain. Therefore, there are 4 significant figures (2, 0, 1, and the uncertain 0 at the end). Answer D is the best choice as it correctly identifies all four significant figures.

Question 3

How many significant figures are in the number 4.00700 * 10¹³? A) 2 B) 4 C) 5 D) 6 E) none of these

Accepted Answer

The number 4.00700 has 6 significant figures. The trailing zeros after the decimal point count as significant figures because they are between significant figures or after a non-zero digit in a decimal number.

Question 4

The number 243.306 rounded off to five significant figures is
A) 243.31
B) 243.36
C) 243.30
D) 243.00
E) none of these

Accepted Answer

The number 243.306 rounded to five significant figures is 243.31. The first five significant figures are 24330, and the next digit (6) rounds the last significant figure (0) up to 1.

Question 5

Convert 777.5 qt to milliliters (1 L = 1.060 qt).
A)  mL
B)  mL
C)  mL
D) 733.5 mL
E) none of these

Accepted Answer

The answer of Convert 777.5 qt to milliliters (1 L...

Question 6

Convert 949.0 L to milliliters.
A) 0.9490 mL
B) 9.490 mL
C) 949.0 mL
D)  mL
E)  mL

Accepted Answer

The answer of Convert 949.0 L to milliliters.
A) 0.9490 mL
B)...

Question 7

How many significant figures are in the number 123.00015?
A) 5
B) 6
C) 7
D) 8
E) 9

Accepted Answer

The number 123.00015 has 8 significant figures. All non-zero digits are significant, and zeros between non-zero digits or after the decimal point are also significant.

Question 8

Write the number 0.0005020 in scientific notation. A) 5.020 * 10⁴ B) 0.5020 * 10^-³ C) 5.020 * 10^-⁴ D) 50.20 *10^-⁵ E) none of these

Accepted Answer

To convert 0.0005020 to scientific notation, we need to move the decimal point 4 places to the right to get 5.020, and then multiply by 10 to the power of -6 to account for the number of times the decimal point was moved. This results in 5.020 x 10^-6 or 5.020E-6. Choice C matches this format.

Question 9

The result of the following calculation has how many significant figures? (0.4333 J/g °C) (33.12°C - 31.12°C)(412.1 g)
A) 1
B) 2
C) 3
D) 4
E) 5

Accepted Answer

The result is determined by the number with the least significant figures in the calculation. The subtraction (33.12°C - 31.12°C) has 4 significant figures, and the other numbers have 4, 4, and 3 significant figures respectively. Therefore, the result should have 3 significant figures.

Question 10

How many significant figures are in the number 0.0040090?
A) 8
B) 7
C) 6
D) 5
E) 4

Accepted Answer

The number 0.0040090 has 5 significant figures: 4, 0, 0, 9, and the trailing 0 after 9. Leading zeros are not significant.

Question 11

How many significant figures are in the number 3.400?
A) 1
B) 2
C) 3
D) 4
E) 5

Accepted Answer

The number 3.400 has four significant figures. All nonzero digits are significant, and zeros between nonzero digits or after the decimal point are also significant.

Question 12

The product of 0.1400 * 6.02 *10²³ will have how many significant figures? A) 2 B) 3 C) 23 D) 10²³ E) 7

Accepted Answer

The number 0.1400 has 3 significant figures, and 6.02 has 3 significant figures. The product will have the same number of significant figures as the number with the least significant figures, which is 3.

Question 13

Convert 943.4 m to decimeters.
A)  dm
B) 94.34 dm
C) 9.434 dm
D)  dm
E) none of these

Accepted Answer

The answer of Convert 943.4 m to decimeters.
A)  dm
B)...

Question 14

How many significant figures are in the number 0.00204?
A) 3
B) 5
C) 2
D) 6
E) 4

Accepted Answer

The number 0.00204 has three significant figures. Leading zeros are not counted as significant figures, so only the 2, 0, and 4 are considered significant.

Question 15

How many significant figures are in the number 10.050?
A) 1
B) 2
C) 3
D) 4
E) 5

Accepted Answer

The number 10.050 has five significant figures. All non-zero digits are always significant, and zeros between non-zero digits are significant. Additionally, trailing zeros in a decimal number are also significant.

Question 16

How many significant figures are in the number 19.8030?
A) 6
B) 5
C) 4
D) 3
E) 2

Accepted Answer

The number 19.8030 has six significant figures. All non-zero digits are significant, and zeros between significant figures or after the decimal point are also significant.

Question 17

Write the number 345.626 in scientific notation. A) 345.626 B) 3.45626 * 10^-² C) 34.5626 * 10² D) 0.345626 *10³ E) 3.45626 * 10²

Accepted Answer

To write a number in scientific notation, we need to move the decimal point so that there is only one non-zero digit to the left of the decimal point. In this case, we move the decimal point three places to the left to get 3.45626. Then, we express this number as a decimal number between 1 and 10, multiplied by a power of 10. The power of 10 is determined by the number of places we moved the decimal point. Since we moved it three places to the left, the power of 10 is 10^3 or 1000. So, 345.626 in scientific notation is 3.45626 x 10^2. This is choice E.

Question 18

How many significant figures are there in the result of the following calculation? (4.321/2.8)* (6.9234 * 10⁵) A) 1 B) 2 C) 3 D) 4 E) 5

Accepted Answer

The calculation involves division and multiplication. The number of significant figures in the result is determined by the number with the least significant figures used in the calculation, which is 2.8 with 2 significant figures.

Question 19

How many significant figures are in the number 0.02020 * 10¹⁵? A) 3 B) 4 C) 5 D) 6 E) 19

Accepted Answer

The significant figures in a number are all the digits that carry meaning for the precision of the number. In this case, we can count the number of digits that are not zero: 0.02020 F1F1F1S1F1F1F10 10¹⁵ There are four digits: 2, 2, 0, and 2. These are the significant figures of the number. Therefore, the answer is B) 4.

Question 20

How many significant figures should there be in the answer when you divide 4.1 by 7.464?
A) 7
B) 4
C) 3
D) 2
E) 1

Accepted Answer

The number of significant figures in the result of a division is determined by the number with the fewest significant figures in the operation. Here, 4.1 has 2 significant figures, so the answer should have 2 significant figures.

Quiz 2: Measurements and Calculations

What is the result of the following multiplication expressed in scientific notation to the correct number of significant figures? (5.46 x 10³) (8.0 x 10^-3)

How many significant figures are in the measurement 0.2010 g?

How many significant figures are in the number 4.00700 * 10¹³?

The number 243.306 rounded off to five significant figures is

Convert 777.5 qt to milliliters (1 L = 1.060 qt) .

Convert 949.0 L to milliliters.

How many significant figures are in the number 123.00015?

Write the number 0.0005020 in scientific notation.

The result of the following calculation has how many significant figures? (0.4333 J/g °C) (33.12°C - 31.12°C) (412.1 g)

How many significant figures are in the number 0.0040090?

How many significant figures are in the number 3.400?

The product of 0.1400 * 6.02 *10²³ will have how many significant figures?

Convert 943.4 m to decimeters.

How many significant figures are in the number 0.00204?

How many significant figures are in the number 10.050?

How many significant figures are in the number 19.8030?

Write the number 345.626 in scientific notation.

How many significant figures are there in the result of the following calculation? (4.321/2.8) * (6.9234 * 10⁵)

How many significant figures are in the number 0.02020 * 10¹⁵?

How many significant figures should there be in the answer when you divide 4.1 by 7.464?