Question 1

A propane molecule contains 3 atoms of carbon.The number 3 represents how many significant figures?
A) one
B) two
C) three
D) infinite

Accepted Answer

The answer of A propane molecule contains 3 atoms of...

Question 2

Round the following number to four significant figures and express the result in standard exponential notation: 0.35462 A) -0.3546 B) 0.3546 C) 3.546 × 10¹ D) 3.546 × 10^-1 E) 35.46 × 10^-2

Accepted Answer

The number 0.35462 rounded to four significant figures is 0.3546. In standard exponential notation, this is expressed as 3.546 × 10^-1.

Question 3

How many significant figures are there in the answer for the following problem?
34)2 + 0.6699 + 18 = ?
A) one
B) two
C) three
D) four

Accepted Answer

The answer of How many significant figures are there in...

Question 4

The width,length,and height of a large,custom-made shipping crate are 1.22 m,3.22 m,and 0.54 m,respectively.The volume of the box using the correct number of significant figures is ________ m³. A) 2.12134 B) 2.1 C) 2.12 D) 2.121 E) 2.1213

Accepted Answer

The answer of The width,length,and height of a large,custom-made shipping...

Question 5

How many significant figures are in 1009.630 mL?
A) 3
B) 4
C) 5
D) 6
E) 7

Accepted Answer

The answer of How many significant figures are in 1009.630...

Question 6

How many significant figures are there in the answer to the following problem?
( 8)881 × 2.100)+ 0.590 = ?
A) one
B) two
C) three
D) four

Accepted Answer

(8)881 has 5 significant figures, 2.100 has 4 significant figures, and 0.590 has 3 significant figures. When we add these numbers together, we get 18.571. The answer has to be rounded to the least number of significant figures in any of the numbers being added, which is 3 (0.590). Therefore, the answer should be rounded to 18.6, which has 3 significant figures. Thus, the answer has 3 significant figures, and the best choice is D) four.

Question 7

How many of the following numbers contain 3 significant figures? 0)509 1.050 0.0 500 1.06 × 10²⁴ A) one B) two C) three D) four

Accepted Answer

A number contains 3 significant figures if it has a non-zero digit in the hundredth place or beyond. - 0.509 has 3 significant figures - 1.050 has 4 significant figures - 0.0500 has 3 significant figures - 1.06 × 10²⁴ has 3 significant figures (since the first non-zero digit starts at the hundredth place) Therefore, only 3 numbers contain 3 significant figures, which is choice C.

Question 8

How many significant figures are in 4.500 × 10⁴ m? A) 3 B) 4 C) 5 D) 7 E) 8

Accepted Answer

The answer of How many significant figures are in 4.500...

Question 9

Which of the following is the greatest mass? A) 100,000 μg B) 1.000 × 10^-2 kg C) 1.000 × 10^-2 cg D) 1.000 × 10^-6 Mg

Accepted Answer

Option B represents 1.000 × 10^2 kg, which is equal to 100 kg. This is greater than the other options when converted to a common unit for comparison. Option A is 100,000 μg (micrograms), which equals 0.1 g. Option C is 1.000 × 10^2 cg (centigrams), which equals 1 g. Option D is 1.000 × 10^-6 Mg (Megagrams), which equals 1 g. Therefore, 100 kg is the greatest mass.

Question 10

A student weighed 300.0 μg of sulfur in the lab.This is the same mass as A) 3.000 × 10^-⁷ g. B) 3.000 × 10^-⁴ kg. C) 3.000 × 10^-4 mg. D) 3.000 × 10⁵ ng.

Accepted Answer

The answer of A student weighed 300.0 μg of sulfur...

Question 11

How many significant figures are in the measurement,670000.m?
A) 2
B) 3
C) 4
D) 5
E) 6

Accepted Answer

The measurement 670000.m has a decimal point, indicating that all the zeros are significant, resulting in six significant figures.

Question 12

How many significant figures are in the measurement 5.3 g?
A) 1
B) 4
C) 3
D) 2
E) 5

Accepted Answer

The measurement 5.3 g has two significant figures: the "5" and the "3".

Question 13

Which of the following numbers has the greatest number of significant figures? A) 0. 8010 B) 0 .504 C) 742000 D) 9.05 × 10²⁴

Accepted Answer

0.8010 has four significant figures, which is more than the other options. Option B has three significant figures, option C has only three significant figures (assuming standard notation without specifying otherwise), and option D is not properly formatted to assess its significant figures accurately but typically would represent a number in scientific notation, which would not exceed the significant figures in option A based on the given choices.

Question 14

The mass of a proton is 1.67 × 10^-27 kg.What is the mass of a proton in milligrams? A) 1.67 × 10^-²⁷ mg B) 1.67 × 10^-²⁴ mg C) 1.67 × 10^-²¹ mg D) 1.67 × 10^-¹⁸ mg

Accepted Answer

To convert kilograms to milligrams, multiply by 10^6 (since 1 kg = 10^6 mg). Thus, 1.67 × 10^-27 kg is equal to 1.67 × 10^-27 × 10^6 mg = 1.67 × 10^-21 mg.

Question 15

Determine the mass of an object that has a volume of 88.6 mL and a density of 7.77 g/mL.
A) 96.4 g
B) 0.0877 g
C) 11.4 g
D) 80.8 g
E) 688 g

Accepted Answer

The mass of an object can be calculated using the formula: mass = density × volume. Here, mass = 7.77 g/mL × 88.6 mL = 688 g.

Question 16

How many significant figures are in the measurement,0.0004932 g?
A) 4
B) 5
C) 6
D) 7
E) 8

Accepted Answer

The significant figures in a measurement are the digits that carry meaningful information about its precision. In 0.0004932 g, the leading zeros are not significant, so there are 4 significant figures: 4, 9, 3, and 2.

Question 17

The mass of a single arsenic atom is 1.244 × 10^-22 g.This is the same mass as A) 1.244 × 10^-16 mg. B) 1.244 × 10^-25 kg. C) 1.244 × 10^-28 μg. D) 1.244 × 10^-31 ng.

Accepted Answer

The answer of The mass of a single arsenic atom...

Question 18

How many significant figures are there in the answer for the following problem?  = ?
A) one
B) two
C) three
D) four

Accepted Answer

The answer of How many significant figures are there in...

Question 19

Convert 5 μm to meters. A) 5 × 10^-9 m B) 5 × 10^-6 m C) 5 × 10^-3 m D) 5 × 10⁶ m

Accepted Answer

To convert micrometers to meters, we need to divide by 10^6. Thus, 5 μm is equal to 5 × 10^-6 m. Option B has the correct exponent of -6, making it the best choice.

Question 20

The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide.What is this distance in centimeters? A) 1.15 × 10^-⁹cm B) 1.15 × 10^-⁸cm C) 1.15 × 10¹²cm D) 1.15 × 10¹⁶ cm

Accepted Answer

To convert picometers (pm) to centimeters (cm), we need to divide by 10^10. 
115 pm / (10^10 pm/cm) = 1.15 x 10^-8 cm 
Therefore, the answer is B: 1.15 x 10^-8 cm.

Quiz 1: Essentials: Units, Measurements, and Problem Solving

A propane molecule contains 3 atoms of carbon.The number 3 represents how many significant figures?

Round the following number to four significant figures and express the result in standard exponential notation: 0.35462

How many significant figures are there in the answer for the following problem? 34) 2 + 0.6699 + 18 = ?

The width,length,and height of a large,custom-made shipping crate are 1.22 m,3.22 m,and 0.54 m,respectively.The volume of the box using the correct number of significant figures is ________ m³.

How many significant figures are in 1009.630 mL?

How many significant figures are there in the answer to the following problem? ( 8) 881 × 2.100) + 0.590 = ?

How many of the following numbers contain 3 significant figures? 0) 509 1.050 0.0 500 1.06 × 10²⁴

How many significant figures are in 4.500 × 10⁴ m?

Which of the following is the greatest mass?

A student weighed 300.0 μg of sulfur in the lab.This is the same mass as

How many significant figures are in the measurement,670000.m?

How many significant figures are in the measurement 5.3 g?

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

The mass of a proton is 1.67 × 10^-27 kg.What is the mass of a proton in milligrams?

Determine the mass of an object that has a volume of 88.6 mL and a density of 7.77 g/mL.

How many significant figures are in the measurement,0.0004932 g?

The mass of a single arsenic atom is 1.244 × 10^-22 g.This is the same mass as

How many significant figures are there in the answer for the following problem? = ?

Convert 5 μm to meters.

The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide.What is this distance in centimeters?