Solids, Liquids and Gases
Relative Masses of Atoms and Molecules
Counting Atoms: The Mole
Neutralisation and salt
Air
100
State what is the kinetic particle theory of matter and list three 3 main points.
-particles are too small to be seen directly - there are spaces between particles of matter; the amount of space between particles is different in solids, liquids, and gases the particles of matter are in constant motion; particles move at different speeds in solids, liquids and gases
100
What is the lightest atom?
hydrogen atom
100
What is molar mass
mass of one mole of any substance
100
What is Neutralisation?
reaction between an acid and a base to form a salt and water only
100
What is the atmosphere?
layer of air about eight kilometres thick
200
What is Diffusion?
The spreading and mixing of particles in liquids and gases
200
What is the relative atomic mass of an element?
average mass of one atom of the element when compare with 1/12 of the mass of an atom of carbon-12.
200
What is Avogadro's Law?
a theory that states equal volumes of gases, at the same temperature and pressure contain equal number of particles or molecules
200
When sulfur dioxide react with water, what is product
sulphuric acid
200
What is the percentage of nitrogen in Dry air
79%
300
What are the two factors that affect the rate of diffusion?
temperature, mass of the particle
300
What is the relative atomic mass of lead, iodine, potassium and zinc?
Pb-207 I-127 K-39 Zn-65
300
What does the word in Chemistry concentration mean
amount of solute in a unit volume of a solution
300
Please write the chemical formula for aluminium oxide
Al2O3
300
What is combustion
when a substance react with oxygen in an exothermic reaction
400
Please state the effect of temperature and mass on particles
The higher the temperature, the faster the particles diffuse; the lower the temperature, the slower the particles diffuse. The greater the mass, the slower the particles diffuse; the smaller the mass, the faster the particles diffuse.
400
What is relative molecular mass?
(of a molecule) aerate mass of one molecule of a substance when compared with 1/12 of the mass of one atom of carbon-12
400
write out the formula of calculating the amount of solute
Number of moles of solute= Concentration(mol/dm^3) x Volume of solution (dm^3)
400
how does Sulfur Dioxide form
It forms when sulfur is burn in air
400
CH4+2O2-----> CO2+2H20
Please write down the reaction when methane is burned
500
What is Solid carbon dioxide and what is it used for.
Solid carbon dioxide is another substance that "sublimes". It is used to cool substances to very low temperature, for example to keep a box of coke cold.
500
What is the formula for Relative molecular mass of a molecule?
The average mass of one molecule of a substance/ 1/12 * [The mass of one atom of carbon-12]
500
Calculate the mass of solute in 600cm^3 of 1.5mol/dm^3 sodium hydroxide solution
Volume of solution= 600cm^3=0.60dm^3 Number of moles of NaOH = Concentration x Volume =1.5x0.60=0.90mol Mass of NaOH= 0.90x40=36g
500
Please write the reaction between Copper(II) carbonate and sulphuric acid
CuCO3+H2SO4---->CuSO4+CO2+H2O
500
What are the six main air pollutants?
1. Sulfur dioxide 2. Nitrogen oxides 3. Carbon monoxide 4.Methane 5. Unburnt hydrocarbons 6.Ozones
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