This law states that the amount of matter does not change from reactants to products.
What is the Law of Conservation of Mass?
100
This is the number of valence electrons in the element boron.
What is three?
100
The kinetic molecular theory states that gas molecules attraction is this.
What is very small?
100
This is the energy required (in J) to heat 1 g of water 1 C.
What is 4.184 J?
100
This is what happens to the boiling point of molecules as the attractive forces increase in strength.
What is increases?
200
The coefficients in a chemical equation represent this (helpful in converting from reactants to products).
What is the mole-mole ratio?
200
This is the electron dot structure for H2O.
What is ???
200
This is what happens to the pressure of a gas when the volume increases. (Boyle's Law)
What is decreases?
200
The heat of fusion for water is 334 J/g. This is the heat absorbed when 48.0 g of water melts.
What is 16.0 kJ?
200
These are the main attractive forces involved in polar molecules.
What is dipole-dipole?
300
This is the term used for a reactant that is fully used up in a chemical reaction.
What is limiting reactant?
300
This is the shape determined through VSEPR for NH3.
What is trigonal pyramidal?
300
This is the equation for the ideal gas law.
What is PV=nRT?
300
This is the percent yield of a reaction that produced 0.634 g of product A. The theoretical yield is 1.268 g.
What is 50%?
300
This is the term for the change from a solid to a gas.
What is sublimation?
400
This is the term for a reaction which has an enthalpy change that is negative.
What is exothermic?
400
Draw the two structures for HCN.
What is ???
400
This is the law which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each gas.
What is Dalton's Law (of Partial Pressures)?
400
This is the energy given off for the following reaction if enthalpy change is -572 kJ. 1.200 g of H2 was used.
2H2 + O2 --> 2H2O
What is 172 kJ?
400
This is represented on a heating or cooling curve by the horizontal lines.
What is a phase change?
500
This is the mass of Chromium (III) oxide that forms from the reaction that has a 70.0% yield of 70.0 g of chromium and 60.0 g of oxygen in the following reaction. Cr + O2 --> Cr2O3
What is 71.6 g?
500
This is the polarity for the molecule CH3F.
What is polar?
500
This is the volume of 2 moles of gas at STP.
What is 44.8 L?
500
For the combustion of methane, 30.0 g of methane and 66.0 g of oxygen are used. This is the pressure (atm) of carbon dioxide collected in a 10.0 L container at 50.0 C.
What is 2.73 atm?
500
This is the energy required to heat 1.00 mole of water at 0 C to steam at 100 C. Heat of fusion= 334 J/g; Heat of vaporization= 2260 J/g; Sp. Heat of water is 4.184 J/gC