# data[].attributes.body
Take it a step past chemical or physical- list the evidence to support your decision and the property affected

# data[].attributes.attachment_link.description
In this quiz, we'll be taking a look at the two scientific topics of physics and chemistry and combining them, as we look at the changes that occur when specific scientific reactions take place. Is it a chemical or a physical change? That's up for you to tell us!

# data[].attributes.headline
Identifying Physical and Chemical changes and Properties

# data[].attributes.subject
Identifying Physical and Chemical changes and Properties

# data[].attributes.body
Again, practice listing the evidence when you are working on selecting types of changes

# data[].attributes.attachment_link.title
Interactive Practice on Physical vs. Chemical Properties

# data[].attributes.attachment_link.description
Physical properties are properties of an element or compound that can be observed without a chemical reaction of the substance. A substance's color and density are physical properties.

# data[].attributes.body
You can play a solo game against others- no need to log in or sign up- click on "skip this step".

# data[].attributes.attachment_link.title
Physical and Chemical Changes Quiz Review - Quiz

# data[].attributes.attachment_link.description
Find and create gamified quizzes, lessons, presentations, and flashcards for students, employees, and everyone else. Get started for free!

# data[].attributes.body
Quiz yourself afterwards or complete the Activity

# data[].attributes.attachment_link.description
It’s nothing about flipping houses. Find out the difference between chemical and physical changes, and learn some real-life examples. Ice cream, anyone?

# data[].attributes.body
Quiz yourself afterwards or complete the Activity

# data[].attributes.attachment_link.description
Throw an anchor into the ocean and it sinks. So why does a boat holding an anchor float? Discover the mysteries of buoyancy!

# data[].attributes.body
Quiz yourself afterwards, or complete the activity

# data[].attributes.body
Quiz or Activity After!

# data[].attributes.body
Quiz or Activity After

# data[].attributes.attachment_link.description
BrainPOP - Animated Educational Site for Kids - Science, Social Studies, English, Math, Arts & Music, Health, and Technology

# data[].attributes.body
Quiz or Activity After

# data[].attributes.body
Quiz or Activity After

# data[].attributes.attachment_link.title
Standard and Scientific Notation - BrainPOP

# data[].attributes.attachment_link.description
Some numbers are too big or too small to fit on a page! Tim and Moby use decimal power, the power of tens, to show you about standard and scientific notation.

# data[].attributes.body
Quiz or Activity After

# data[].attributes.body
stay in the boyles and charles areas

# data[].attributes.attachment_link.readable_text
A series of free High School Chemistry Video Lessons.

In this lesson, we will learn and apply

Boyle's Law

Charles' Law

Gay-Lussac's Law

Combined Gas Law

Ideal Gas Law

The following table gives the Gas Law Formulas. Scroll down the page for more examples and solutions on how to use the Boyle's Law, Charles'Law, Gay-Lussac's Law, Combined Gas Law and Ideal Gas Law.

Boyle's Law

Boyle's Law states that volume of a given amount of gas held at a constant temperature varies inversely the with pressure. The relationship between pressure and volume of Boyle's Law is expressed in mathematical terms as P ₁V ₁= P ₂V ₂.

An introduction to the relationship between pressure and volume, and an explanation of how to solve gas problems with Boyle's Law
Example:
At 1.70 atm, a sample of gas takes up 4.25L. If the pressure in the gas is increased to 2.40 atm, what will the new volume be?
Understanding and applying Boyle's Law
Example:
A sample of Ne gas occupies 0.220L at 0.86 atm. What will be its volume at 29.4kPa?

Charles' Law

Charles' Law states that the volume of a given mass of a gas is directly proportional to its Kelvin temperature at constant pressure. In mathematical terms, the relationship between temperature and volume is expressed as V ₁/T ₁=V ₂/T ₂.

What is the relationship between volume and temperature of a gas and how to solve problems using Charles' Law?
Example:
A balloon takes up 625L at 0°C. If it is heated to 80°C, what will its new volume be? Understanding and applying Charles' Law
Example:
A gas at 40.0°C occupies a volume of 2.32L. If the temperature is raised to 75.0°C, what will the new volume be if the pressure is constant?

Gay-Lussac's Law

Gay-Lussac's Law states that the pressure of a given mass of gas varies directly with the Kelvin temperature when the volume remains constant. Gay-Lussac's Law is expressed in a formula form as P ₁/T ₁ = P ₂/T ₂. When dealing with Gay-Lussac's Law, the unit of the temperature should always be in Kelvin.

Using Gay-Lussac's Law to understand the relationship between a gas' pressure and temperature
Example:
If the pressure in a car tire is 1.88 atm at 25°C, what will be the pressure if the temperature warms to 37°C? How to solve word problems that show how to use Gay-Lussac's Law?
Examples:
1. The pressure in a sealed can of gas is 235kPA when it sits at room temperature (20°). If the can is warmed to 48°C, what will the new pressure inside the can be?
2. A car tire has a pressure of 2.38 atm at 15.2°C. If the pressure inside reached 4.08 atm, the tire will explode. How hot would the tire have to get for this to happen? Report the temperature in degrees Celsius. Practice Problem to show how to use Gay-Lussac's Law
Example:
In the morning, a paintball pressure tank is at 306 atm. The weather heats up over the course of the day, and by 3 PM, the outside temperature is roasting at 38.5°C, and the pressure inside the tank is 324 atm. What was the temperature (in degree Celsius) in the morning?

Combined Gas Law

The Combined Gas Law combines Charles' Law, Boyle's Law and Gay Lussac's Law. The Combined Gas Law states that a gas' (pressure × volume)/temperature = constant.

The combined law for gases.
Example:
A gas at 110kPa at 30.0°C fills a flexible container with an initial volume of 2.00L. If the temperature is raised to 80,0°C and the pressure increases to 440Kpa, what is the new volume? How to solve problems with the Combined Gas Equation?
Example:
A 40.0L balloon is filled with air at sea level (1.00 atm, 25.0°C). It is tied to a riavk and thrown in a cold body of water, and it sinks to the point where the temperature is 4.0°C and the pressure is 11.0 atm. What will its new volume be?

Ideal Gas Law

The Ideal Gas Law mathematically relates the pressure, volume, amount and temperature of a gas with the equation:
pressure × volume = moles × ideal gas constant × temperature;
PV = nRT.

The Ideal Gas Law is ideal because it ignores interactions between the gas particles in order to simplify the equation. There is also a Real Gas Law which is much more complicated and produces a result which, under most circumstances, is almost identical to that predicted by the Ideal Gas Law.

Understanding and applying the ideal gas law
Example:
What is the pressure in atm of a 0.108 mol sample of the gas at a temperature of 20.0°C if its volume is 0.505L? Sample problems for using the Ideal Gas Law, PV = nRT
Examples:
1) 2.3 moles of Helium gas are at a pressure of 1.70 atm, and the temperature is 41°C. What is the volume of the gas?
2) At a certain temperature, 3.24 moles of CO ₂ gas at 2.15 atm take up a colume of 35.28L. What is this temperature (in Celsius)?

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.

# data[].attributes.attachment_link.title
Gas Laws (solutions, examples, worksheets, videos, games, activities)

# data[].attributes.attachment_link.description
A series of free High School Chemistry Video Lessons. In this lesson, we will learn and apply Boyle's Law Charles' Law Gay-Lussac's Law Combined Gas Law Ideal Gas Law The following table gives the Gas Law Formulas. Scroll down the page for more examples and solutions on how to use the Boyle's Law, Charles'Law, Gay-Lussac's Law, Combined Gas Law and Ideal Gas Law.

# data[].attributes.body
Stick to the problems that look familiar to you...torr is a measurement of pressure

# data[].attributes.attachment_link.description
Fill in all the gaps, then press "Check" to check your answers. You may NOT use a calculator. Express all answers as numbers, not words.

# data[].attributes.attachment_link.readable_text
P1V1T2 = P2V2T1
Gas Laws Practice Problems
1) Work out each problem on scratch paper.
2) Click ANSWER to check your answer.
3) Click NEXT to go on to the next problem.
C. Johannesson
CLICK TO START
1
2
3
4
5
6
QUESTION #1
Helium occupies 3.8 L at -45°C.
What volume will it occupy at 45°C?
7
8
ANSWER
9
10
C. Johannesson
1
2
3
4
5
6
7
ANSWER #1
V1 = 3.8 L
T1 = -45°C = 228 K
V2 = ?
T2 = 45°C = 318 K
CHARLES' LAW
P1V1T2 = P2V2T1
V2 = 5.3 L
8
9
10
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
7
8
QUESTION #2
Ammonia gas occupies a volume of
450. mL at 720. mm Hg. What
volume will it occupy at standard
pressure?
ANSWER
9
10
C. Johannesson
1
2
3
4
5
6
7
ANSWER #2
V1 = 450. mL
P1 = 720. mm Hg
V2 = ?
P2 = 760. mm Hg
BOYLE'S LAW
P1V1T2 = P2V2T1
V2 = 426 mL
8
9
10
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
7
8
9
QUESTION #3
A gas at STP is cooled to -185°C.
What pressure in atmospheres will it
have at this temperature (volume
remains constant)?
ANSWER
10
C. Johannesson
1
2
3
4
5
6
7
ANSWER #3
P1 = 1 atm
T1 = 273 K
P2 = ?
T2 = -185°C = 88 K
8
P2 = 0.32 atm
9
10
GAY-LUSSAC'S
LAW
P1V1T2 = P2V2T1
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
7
8
QUESTION #4
A gas occupies 1.5 L at 850 mm Hg
and 15°C. At what pressure will this
gas occupy 2.5 L at 30.0°C?
ANSWER
9
10
C. Johannesson
1
2
3
4
5
6
7
8
9
10
ANSWER #4
V1 = 1.5 L
P1 = 850 mm Hg
T1 = 15°C = 288 K
P2 = ?
V2 = 2.5 L
T2 = 30.0°C = 303 K
COMBINED
GAS LAW
P1V1T2 = P2V2T1
P2 = 540 mm Hg
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
QUESTION #5
Chlorine gas has a pressure of 1.05
atm at 25°C. What pressure will it
exert at 75°C?
7
8
ANSWER
9
10
C. Johannesson
1
2
3
4
5
6
7
ANSWER #5
P1 = 1.05 atm
T1 = 25°C = 298 K
P2 = ?
T2 = 75°C = 348 K
GAY-LUSSAC'S
LAW
P1V1T2 = P2V2T1
8
P2 = 1.23 atm
9
10
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
7
8
QUESTION #6
A gas occupies 256 mL at 720 torr
and 25°C. What will its volume be
at STP?
ANSWER
9
10
C. Johannesson
1
2
3
4
5
6
7
8
9
10
ANSWER #6
V1 = 256 mL
P1 = 720 torr
T1 = 25°C = 298 K
V2 = ?
P2 = 760. torr
T2 = 273 K
COMBINED
GAS LAW
P1V1T2 = P2V2T1
V2 = 220 mL
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
7
8
9
QUESTION #7
At 27°C, fluorine occupies a volume of
0.500 dm3. To what temperature in
degrees Celsius should it be lowered to
bring the volume to 200. mL?
ANSWER
10
C. Johannesson
1
2
3
4
5
6
7
8
ANSWER #7
T1 = 27ºC = 300. K
CHARLES' LAW
V1 = 0.500 dm3
P1V1T2 = P2V2T1
T2 = ?°C
V2 = 200. mL = 0.200 dm3
T2 = -153°C
(120 K)
9
10
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
7
8
9
10
QUESTION #8
A gas occupies 125 mL at 125 kPa.
After being heated to 75°C and
depressurized to 100.0 kPa, it
occupies 0.100 L. What was the
original temperature of the gas?
ANSWER
C. Johannesson
1
2
3
4
5
6
7
8
9
10
ANSWER #8
V1 = 125 mL
P1 = 125 kPa
T2 = 75°C = 348 K
P2 = 100.0 kPa
V2 = 0.100 L = 100. mL
T1 = ?
COMBINED
GAS LAW
P1V1T2 = P2V2T1
T1 = 544 K
(271°C)
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
7
8
QUESTION #9
A 3.2-L sample of gas has a pressure
of 102 kPa. If the volume is reduced
to 0.65 L, what pressure will the gas
exert?
ANSWER
9
10
C. Johannesson
1
2
ANSWER #9
3
4
5
6
7
V1 = 3.2 L
P1 = 102 kPa
V2 = 0.65 L
P2 = ?
8
P2 = 502 kPa
9
10
BOYLE'S LAW
P1V1T2 = P2V2T1
NEXT
BACK TO PROBLEM
C. Johannesson
1
2
3
4
5
6
7
8
9
10
QUESTION #10
A gas at 2.5 atm and 25°C expands to
750 mL after being cooled to 0.0°C
and depressurized to 122 kPa. What
was the original volume of the gas?
ANSWER
C. Johannesson
1
2
3
4
5
6
7
8
9
10
ANSWER #10
P1 = 2.5 atm
COMBINED
T1 = 25°C = 298 K
GAS LAW
V2 = 750 mL
P1V1T2 = P2V2T1
T2 = 0.0°C = 273 K
P2 = 122 kPa = 1.20 atm
V1 = ?
V1 = 390 mL
EXIT
BACK TO PROBLEM
C. Johannesson

# data[].attributes.attachment_link.description
P1V1T2 = P2V2T1 Gas Laws Practice Problems 1) Work out each problem on scratch paper. 2) Click ANSWER to check your answer. 3) Click NEXT to go on to the next problem. C. Johannesson CLICK TO START 1 2 3 4 5 6 QUESTION #1 Helium occupies 3.8 L at -45°C.

# data[].attributes.attachment_link.description
This quiz is designed to test your reading comprehension and understanding of the Scientific Notation section of the Online Study Guide to Chemistry.

# data[].attributes.attachment_link.description
Free gamified quizzes on every subject that students play in class and at home. Pick an existing quiz or create your own for review, formative assessment, and more.

# data[].attributes.attachment_link.title
IXL | Multiply numbers written in scientific notation | Algebra 1 math

# data[].attributes.attachment_link.description
Improve your math knowledge with free questions in "Multiply numbers written in scientific notation" and thousands of other math skills.

# data[].attributes.attachment_link.title
IXL | Divide numbers written in scientific notation | Algebra 1 math

# data[].attributes.attachment_link.description
Improve your math knowledge with free questions in "Divide numbers written in scientific notation" and thousands of other math skills.

# data[].attributes.attachment_link.keywords[]
teach the earth:enhancing your teaching:quantitative skills

# data[].attributes.attachment_link.description
Jump to: Rock and Mineral density | Rock and mineral specific gravity You can download the questions (Acrobat (PDF) 25kB Jul24 09) if you would like to work them on a separate sheet of paper. Calculating densities ...

# data[].attributes.body
stick to mm, cm, m, km, mL, L, kL, mg, g, Kg

# data[].attributes.attachment_link.readable_text
Related Topics:
Introduction to the Metric System
Metric Worksheets
Measurement Games

In these lessons, we will look into two methods that can be used for metric conversion problems. The first method uses the metric table and can also be regarded as a shortcut method. The second method uses the unit fraction method.

The following diagrams show some metric conversions for lengths and weights. Scroll down the page for examples and solutions.

Method 1

The metric system uses prefixes to denote multiple of 10.

The following table shows some common prefixes.

Each prefix differs by a multiple of 10 from the next prefix. When converting between the different units of measure, we look at the number of "jumps" between the prefixes of the two units and then multiply or divide by the powers of 10 accordingly (moving to the right would mean to multiply and moving to the left would mean to divide).
Example :
Convert 3 km to m
Solution:
There are 3 "jumps" to the right from kilometer to meter.

So, we multiply by 10 ³ = 1000

3 km = 3 × 1,000 = 3,000 m
Example:
Convert 20 mm to cm
Solution:
There is 1 "jump" to the left from millimeter to centimeter

So, we divide by 10.

20 mm = 20 ÷ 10 = 2 cm

How to perform metric conversion using the table method or shortcut method?
Examples:
1. 7m to cm
2. 15L to mL
3. 30000mg to g How to convert metric units of weight without using a calculator?
The presentation focuses on conversion between kg, g, and mg.
Imagine a 1 kilogram(kg) tablet which is made up of a 1000 smaller gram(g) tablets which is in turn made up of 1000 even smaller milligram (mg) tablets.
Big to small: multiply
Small to big: divide How to multiply and divide by 1000 in conversion of metric units?
This tutorial explains answers to exercises in converting metric units of weight. The exercises involve multiplying and dividing without a calculator. How to convert to different metric units of measure for length, capacity, and mass?
The metric system is widely used because it is based on the powers of 10. It allows for easy conversion between smaller and larger units.
The basic unit of length is the meter(m). It is just over 1 yard.
The basic unit of weight is the gram(g). One gram is the mass of 1 cubic centimeter of water.
The basic unit of capacity or volume is liter(l). A liter equals 1000 cubic centimeters.
Examples:
Complete each conversion
1. 6.3km = ____ m
2. 62,300cm = ___ hm
3. 37,200g = ___ kg
4. 1.73hg = ___ dg
5. 93.7L = ___ mL
6. 62,300cL = ___ kL

How to use the metric staircase to convert units within the metric system?
Another method similar to the table method is to use the metric staircase. It is also called the ladder method.
How to use the metric staircase to convert between metric measurements?
When you go up the stairs to the left, move the decimal to the left.
When you go down the stairs to the right, move the decimal to the right.

Method 2

In this method, we multiply by a unit fraction in order to perform the metric conversion.
Example :
Convert 3 km to m
Solution: Example:
Convert 20 mm to cm
Solution:
How to perform metric conversion using the unit fraction method?
How to use the unit fraction method for metric unit conversion?

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.

# data[].attributes.attachment_link.title
Metric Math Problems (solutions, examples, videos)

# data[].attributes.attachment_link.description
Metric Maths Conversion Problems, using the metric table, shortcut method, the unit fraction method, how to convert to different metric units of measure for length, capacity, and mass, examples and step by step solutions, how to use the metric staircase or ladder method

# data[].attributes.attachment_link.title
Convert Metric Units Questions and Answers

# data[].attributes.attachment_link.description
Questions letting you practice metric units and how to convert them correctly.