Chemical Reactions
A chemical can be defined as
any substance that has definite composition
Whose series of experiments identified the nucleus of the atom?
Rutherford
What is the Molar Mass of NaCl
58.45 g/mol
According to the Kinetic-Molecular Theory, particles of matter?
are in constant motion
During boiling, the temperature of a liquid...
remains constant
The coefficients in a chemical equation represent the
relative numbers of moles of reactants and products
Which part of the atom has a mass approximately equal to 1/2000 of the mass of a common hydrogen atom?
Electron
In grams, what is the weight of .45 mol H20?
8.1g
According to the kinetic-molecular theory, particles of an ideal gas
neither attract nor repel each other but collide
To be effective a collision must have these two things.
sufficient energy and favorable orientation
A balanced chemical equation allows one to determine
mole ratio of any two substances in the reaction
Atoms of the same element can differ in...
mass number
1mol S8 : 24 mol F2
What happens to the volume of a gas during compression?
The volume decreases
The minimum energy required for an effective collision.
Activation energy
What reaction always produces H2O and CO2
Combustion Reaction
Which model of the atom explains the orbitals of electrons in waves?
the quantum model
For the Reaction 2H2+O2-> 2H2O, how many grams of water are produced from 6 mol Hydrogen?
108g
The volume of a gas collected when the temperature is 11C and the pressure is 710 mm HG measures 14.8mL. What is the calculated volume of the gas at 20C and 740 mm Hg?
14.6mL
Definition of entropy
The level of disorder of something
Balance the chemical reaction
Fe2O3 + C -> Fe + CO2
2 Fe2O3 + 3C -> 4Fe + 3CO2
According to the quantum theory of an atom, in an orbital
an electron's position cannot be known precisely
For the reaction 3Fe + 4H2O -> Fe3O4 +4H2, how many moles of iron oxide are produced from 500g of iron in an excess of H2O?
2.98 mol
What is the value of r in the ideal gas law when pressure is given in torr?
62.36
Gibbs free energy equation
G=H-TS