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

Chemistry

Topic 1

QuestionAnswer
What is the mass number of Mg ? 24.3
What is a relative atomic mass? It is the weighted mean mass of an atom of an element compared with 1/12 of the mass of carbon-12.
What is an acid? Proton donor
What is a base? Proton acceptor.
Another name of positively charged ions? Cations
What products will we get if acid+carbonate reacts? salt-CO2-H2O
What is the oxidation number ? It is the number of electrons that an atom uses to bond with atoms of another element.
What are reactants of equation N2+H2=NH3? N2 and H2
What is the formula for Sulfuric acid? H2SO4
If we drop an indicator into a base,and it becomes pink,what indicator is it? Phenolphtalein
What is oxidation? Loss of electrons or an increase in oxidation number.
What is reduction? Gain of electrons or a decrease on oxidation number.
What is a redox reaction? A reaction in which both reduction and oxidation take place.
What is an oxidation number of N in HNO3? +5
Calculate the mass in g. in 5 mol KOH? 280.5
Which one is a half equation: 1)Mg=Mg2+ + 2e- 2)2HCL+CaCO3=CaCl 2 + H2O + CO2 1
What is a relative molecular mass of Al(OH)3? 68
Created by: Nikita Udalov
Popular Chemistry 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