Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Air. O2 + CO2

Science Junior Cert

QuestionAnswer
78% of what gas is found in air Nitrogen
21% of what gas is found in air Oxygen
The components of air can be _____________ easily Separated
The ____________________ of air varies Composition
In the experiment to show the amount of oxygen in air, when you pass oxygen over heated copper, what is formed Copper oxide
What do you call the paper used to test for water Cobalt chloride paper
What colour does the cobalt chloride paper turn if water is present Blue to pink
What happens to limewater when carbon dioxide is present Turns milky
What do you call a substance which can change the speed of a chemical reaction Catalyst
The chemical formula for hydrogen peroxide is what H2O2
The chemical formula for manganese dioxide is what MnO2
Oxygen is a colourless, odourless and __________?gas Tasteless
Oxygen is slightly ___________ than air Heavier
is oxygen acidic, basic or neutral gas Neutral
What happens when you put a glowing splint in oxygen Relights
What is formed when magnesium is burned in oxygen Magnesium oxide
The chemical formula for calcium carbonate is CaCO3
The chemical formula for Hydrochloric acid is HCl
The chemical formula for calcium chloride is CaCl2
Calcium carbonate is more commonly known as what? Marble chips
Dilute hydrochloric acid is added to calcium carbonate to make what gas? Carbon dioxide
What is added to manganese dioxide to make oxygen gas Hydrogen peroxide
Carbon dioxide is odourless, tasteless and what? Colourless
Is carbon dioxide acidic, basic or neutral Acidic
Does carbon dioxide support combustion No
Is carbon dioxide less dense or more dense than air More dense
Carbon dioxide dissolves in water to form what acid Carbonic acid
Name two uses of oxygen Breathing , burning
Name two uses of carbon dioxide Photosynthesis, fizzy drinks
Created by: gcu science
Popular Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards