How many hydrogen ions are in pure water?
1. 1*10^(-7)
2. 10*10^(-7)
3. 1*10^(-10)
4. 1*10^(7)
1. 1*10^(-7)
100
The process of stimulating a chemical reaction
Catalysis
100
What are four main states of matter?
liquid, gas, solid, plasma
100
What is an original name of Nitrogen?
Azote
100
The first artificial plastic was developed by Alexander Parkes in 1862
True
200
What is a particle that has the least mass?
1. Neutron
2. Proton
3. Electron
3. Electron
200
A thing that is used to measure the dispersion of visible light by a prism
Spectroscopy
200
Free Points!
200 Free Points!
200
What is the difference between acid and base?
Acid is a chemical compound that dissolves in pure water to release hydrogen ions.
Base releases hydroxide ion when dissolved in water.
200
If a liquid contains 1*10^(-5) hydrogen ions, it is an acid.
True
300
Free Points!
300 Free Points!
300
The process by which a liquid containing dissolved substances passes through a semi-permeable membrane
Osmosis
300
What kind of shape does carbon form in diamond?
Cube
300
What is the name of substance that is treated with nitric acid to form a hard ivory-like substance?
*** Hint: this substance can be found in plant cell wall.
Cellulose
300
Elements with similar properties are in the same row.
False
Elements with similar properties are in the same "Column"!
400
The number of electrons within the shells increases from
1. right to left
2. down to up
3. up to down
4. left to right
4. left to right
400
A method of displaying all of the chemical elements
Periodic Table
400
From where to where does the solvent flow?
From a solution with a low concentration to a solution with higher concentration
400
When does the first plastic made from a synthetic polymer, bakelite?
1912
400
Carbon is an essential part of proteins and nucleic acids
False
Nitrogen is an essential part of proteins and nucleic acids
500
What is a pH scale of orange juice?
1. 3.1
2. 3.3
3. 3.5
4. 3.7
3. 3.5
500
A chemical process that is used to create ammonia from nitrogen and hydrogen
Haber process
500
What is a substance that is used to split water into hydrogen and oxygen gas?
Platinum electrode
500
What is a reason that platinum is used for the electrode?
Oxygen reacts so easily with other metals that the anode can dissolve
500
Diamonds are not that transparent and poor at conducting electricity
False
Diamonds are highly transparent and poor at conducting electricity.