Question 1

A student is working on converting a number that has a unit with the SI prefix milli- to a unit that has the prefix mega-.Using your knowledge about the relative sizes that milli- and mega- represent,how should the student convert the number?

Accepted Answer

Milli- represents 10^-3 and mega- represents 10^6. To convert from milli- to mega-, divide by 10^9 (10^6 / 10^-3 = 10^9).

Question 2

4.41 seconds contain this many nanoseconds.

Accepted Answer

1 second = 10⁹ nanoseconds4.41 seconds = 4.41 × 10⁹ nanoseconds

Question 3

Four samples were weighed using three different balances.(All are as accurate as the precision indicates.)The masses are 0.94 kg,58.2 g,1.55 g,and 250 mg.The total mass should be reported as

Accepted Answer

The answer of Four samples were weighed using three different...

Question 4

The melting point and the normal boiling point of water can be used to calibrate thermometers.What are these respective temperatures in kelvins?

Accepted Answer

The melting point of water is 0°C or 273.15 K and the boiling point of water is 100°C or 373.15 K. Therefore, the best choice is A, which gives the correct temperatures in kelvins. The other options are not correct as they either do not give the temperatures in kelvins or have incorrect values for the melting and boiling points of water.

Question 5

What is the correct answer to the following expression? 2)96 × 10^-10 + 1.01 × 10^-12

Accepted Answer

To add/subtract numbers in scientific notation, we need to have the same power of 10. Here, the powers of 10 for the first and third terms are the same, but the second term has a different power of 10. To make the powers of 10 the same, we need to move the decimal point of the second term two places to the right, which gives us: 2.96 × 10^-10. Now we can add/subtract the terms: 2.96 × 10^-10 + 1.01 × 10^-12 = 2.97 × 10^-10. Therefore, the best choice is E.

Question 6

How many 100-mg aspirin tablets can be made from 10.0 kg of aspirin?

Accepted Answer

First, convert 10.0 kg of aspirin to mg: 10.0 kg = 10,000,000 mg. Then, divide by 100 mg to find the number of tablets: 10,000,000 mg / 100 mg/tablet = 100,000 tablets.

Question 7

Which is the largest mass?

Accepted Answer

10 dg (decigrams) is the largest mass listed. The order from largest to smallest is: decigrams (dg), milligrams (mg), micrograms (µg or mcg), nanograms (ng), picograms (pg), and centigrams (cg).

Question 8

4.9 seconds contain this many picoseconds.

Accepted Answer

There are 10^12 picoseconds in one second, so 4.9 seconds contain 4.9 × 10^12 picoseconds.

Question 9

What is the best answer to the following expression involving a sum of measurements?
(52)706 cm + 0.734 cm + 14.4 cm)

Accepted Answer

The answer of What is the best answer to the...

Question 10

Order the four metric units from smallest to largest.
1)kiloliter 2)centiliter 3)nanoliter 4)milliliter

Accepted Answer

The order from smallest to largest would be:
3) nanoliter
4) milliliter
2) centiliter
1) kiloliter

Question 11

The boiling point of chlorine is 172 K.This temperature corresponds to

Accepted Answer

The answer of The boiling point of chlorine is 172...

Question 12

In the area of nano-chemistry,particles defined as nanoparticles range in size from 1-2500 nm.1 nm is equivalent to 1 × 10^-9 m.If the size of the particles that make up a particular material is 1.23 × 10^-8 cm,what is this size in nanometers?

Accepted Answer

To convert cm to nm, we need to multiply the value by 10^7 (since 1 cm = 10^7 nm).

1.23 × 10^-8 cm = 1.23 × 10^-8 × 10^7 nm 
= 1.23 × 10^-1 nm 
= 0.123 nm

Therefore, the size of the particles is 0.123 nm, which is closest to answer choice C.

Question 13

Which of the following sets of units is not in the order of increasing size?

Accepted Answer

The correct order of increasing size for option D should be pm (picometer) < nm (nanometer) < mm (millimeter), but it is incorrectly listed as pm < mm < nm.

Question 14

The melting point of nitrogen is 63 K.What is this temperature in degrees Celsius?

Accepted Answer

The melting point of nitrogen in Kelvin can be converted to Celsius by subtracting 273.15 from the Kelvin temperature. So, 63 K - 273.15 = -210.15°C, which rounds to -210°C.

Question 15

What is the best answer to report for

Accepted Answer

The answer of What is the best answer to report...

Question 16

The best answer to report for 352.94 - 36.0342 is _____.

Accepted Answer

The answer of The best answer to report for 352.94...

Question 17

The melting point of a solid is 41°F.This corresponds to

Accepted Answer

To convert Fahrenheit to Kelvin, use the formula: K = (°F - 32) × 5/9 + 273.15. For 41°F, this gives approximately 278 K.

Question 18

The distance between atoms is sometimes given in picometers,where 1 pm is equivalent to 1 × 10^-12 m.If the distance between the layers of atoms in a particular compound is given as 338 pm,what is the distance in cm?

Accepted Answer

The answer of The distance between atoms is sometimes given...

Question 19

The radius of a circle is measured to be 4.03 cm.How should the circle's area be reported? (A = πr²)

Accepted Answer

The answer of The radius of a circle is measured...

Question 20

A particular liquid boils at -260°F.What is its boiling point on the Kelvin scale?

Accepted Answer

The answer of A particular liquid boils at -260°F.What is...

Quiz 1: Chemistry and Measurement

A student is working on converting a number that has a unit with the SI prefix milli- to a unit that has the prefix mega-.Using your knowledge about the relative sizes that milli- and mega- represent,how should the student convert the number?

4.41 seconds contain this many nanoseconds.

Four samples were weighed using three different balances.(All are as accurate as the precision indicates.) The masses are 0.94 kg,58.2 g,1.55 g,and 250 mg.The total mass should be reported as

The melting point and the normal boiling point of water can be used to calibrate thermometers.What are these respective temperatures in kelvins?

What is the correct answer to the following expression? 2) 96 × 10^-10 + 1.01 × 10^-12

How many 100-mg aspirin tablets can be made from 10.0 kg of aspirin?

Which is the largest mass?

4.9 seconds contain this many picoseconds.

What is the best answer to the following expression involving a sum of measurements? (52) 706 cm + 0.734 cm + 14.4 cm)

Order the four metric units from smallest to largest. 1) kiloliter 2) centiliter 3) nanoliter 4) milliliter

The boiling point of chlorine is 172 K.This temperature corresponds to

In the area of nano-chemistry,particles defined as nanoparticles range in size from 1-2500 nm.1 nm is equivalent to 1 × 10^-9 m.If the size of the particles that make up a particular material is 1.23 × 10^-8 cm,what is this size in nanometers?

Which of the following sets of units is not in the order of increasing size?

The melting point of nitrogen is 63 K.What is this temperature in degrees Celsius?

What is the best answer to report for

The best answer to report for 352.94 - 36.0342 is _____.

The melting point of a solid is 41°F.This corresponds to

The distance between atoms is sometimes given in picometers,where 1 pm is equivalent to 1 × 10^-12 m.If the distance between the layers of atoms in a particular compound is given as 338 pm,what is the distance in cm?

The radius of a circle is measured to be 4.03 cm.How should the circle's area be reported? (A = πr²)

A particular liquid boils at -260°F.What is its boiling point on the Kelvin scale?

Quiz 1: Chemistry and Measurement

A student is working on converting a number that has a unit with the SI prefix milli- to a unit that has the prefix mega-.Using your knowledge about the relative sizes that milli- and mega- represent,how should the student convert the number?

4.41 seconds contain this many nanoseconds.

Four samples were weighed using three different balances.(All are as accurate as the precision indicates.) The masses are 0.94 kg,58.2 g,1.55 g,and 250 mg.The total mass should be reported as

The melting point and the normal boiling point of water can be used to calibrate thermometers.What are these respective temperatures in kelvins?

What is the correct answer to the following expression? 2) 96 × 10-10 + 1.01 × 10-12

How many 100-mg aspirin tablets can be made from 10.0 kg of aspirin?

Which is the largest mass?

4.9 seconds contain this many picoseconds.

What is the best answer to the following expression involving a sum of measurements? (52) 706 cm + 0.734 cm + 14.4 cm)

Order the four metric units from smallest to largest. 1) kiloliter 2) centiliter 3) nanoliter 4) milliliter

The boiling point of chlorine is 172 K.This temperature corresponds to

In the area of nano-chemistry,particles defined as nanoparticles range in size from 1-2500 nm.1 nm is equivalent to 1 × 10-9 m.If the size of the particles that make up a particular material is 1.23 × 10-8 cm,what is this size in nanometers?

Which of the following sets of units is not in the order of increasing size?

The melting point of nitrogen is 63 K.What is this temperature in degrees Celsius?

What is the best answer to report for

The best answer to report for 352.94 - 36.0342 is _____.

The melting point of a solid is 41°F.This corresponds to

The distance between atoms is sometimes given in picometers,where 1 pm is equivalent to 1 × 10-12 m.If the distance between the layers of atoms in a particular compound is given as 338 pm,what is the distance in cm?

The radius of a circle is measured to be 4.03 cm.How should the circle's area be reported? (A = πr2)

A particular liquid boils at -260°F.What is its boiling point on the Kelvin scale?

What is the correct answer to the following expression? 2) 96 × 10^-10 + 1.01 × 10^-12

In the area of nano-chemistry,particles defined as nanoparticles range in size from 1-2500 nm.1 nm is equivalent to 1 × 10^-9 m.If the size of the particles that make up a particular material is 1.23 × 10^-8 cm,what is this size in nanometers?

The distance between atoms is sometimes given in picometers,where 1 pm is equivalent to 1 × 10^-12 m.If the distance between the layers of atoms in a particular compound is given as 338 pm,what is the distance in cm?

The radius of a circle is measured to be 4.03 cm.How should the circle's area be reported? (A = πr²)