Organics
How is oil and natural gas formed?
Decomposition of ancient organisms buried under sediment.
What is the molar mass of Hcl?
36.4 g/mol
What does pH stand for?
The power of Hydrogen
What oxidation number does an element have in elemental form? Ex. O2
0
How many subatomic particles are there?
Three
How is coal extracted?
Mining: 1. surface mining 2. underground mining
If you react 1 mol of NaOH with 2 mols of HCl, which compound is the limiting reactant?
NaOH
What is the neutral pH value?
7
What is oxidation? (3 definitions)
1. Addition of Oxygen
2. Loss of Hydrogen
3. Loss of electrons
Name the subatomic particle with a positive charge.
Proton
Why do we need fractional distillation?
We need to separate the mixture as crude oil contains many different fuels.
How many moles are there in 5.97 grams of NaOH?
around 0.14 mols
What is the difference between concentration and strength?
Concentration: How much matter(solute) is dissolved in a solvent and the units are per mol dm-3
Strength: Describes how the substance reacts with water
What does LEO the lion goes GER stand for?
Loss of electrons is oxidation
Gain of electrons is reduction
In what part of an atom would you find a proton?
Nucleus
What is the difference between alkane and alkene bonds?
Alkane: single bonds
Alkene: double bonds
A student calculated the theoretical yield of BaSO4 (s) in a precipitation experiment to be 1.352 grams. When she filtered, dried, and weighed her precipitate, however, her yield was only 1.279 grams. Calculate the student’s percent yield.
94.6%
What are amphoteric substances able to do?
They can donate and accept protons.
Write the half equations for the oxidation and reduction of Copper.
Cu = Cu2++2e-
Cu2++2e- = Cu
In which part of the atom would you find the electrons?
Shells or Orbitals
What is the difference between intermolecular forces and intramolecular forces?
Intramolecular is inside a molecule.
Intermolecular is between molecules.
What is Avogadro's number?
6.02x10^23 particles = 1mol
What are the causes of acid rain?
Air pollution: Car emissions, factory emissions etc.
What is the difference between an electrolysis cell and a voltaic cell?
The voltaic cell produces its own energy whereas the electrolysis cell requires a battery pack.
What particles have an atomic mass of 1 AMU?
Proton & Neutron