What is the term for two or more different molecular forms of an element in the same physical state?
Allotrope
100
What is the law that state the pressure and temperature (K) of a gas are directly proportional at a constant volume?
Gay-Lussac's Law
100
What occurs when water molecules attach themselves to the ions of the solute during the solution process?
Hydration
100
What gas law combines Boyle's Law, Gay-Lussac's Law and Charles' Law?
Combined Gas Law
200
In a chemical reaction, what are conserved?
Mass and atoms
200
Kinetic energy is proportional to what?
Temperature
200
What law states that the volume of a fixed mass of gas is directly proportional to its temperature (K) if the pressure is kept constant?
Charles' Law
200
What type of mixture is a solution?
Homogeneous mixture
200
What is the value of R in the Ideal Gas Law when pressure is in atmospheres?
R=0.082
300
What unit must any number put into a BCA table be in?
Moles
300
A gas sample has a pressure of 67.5 kPa. What is the pressure in millimeters of Mercury?
506.417 mmHg
300
Which graph shows an inverse relationship between the variables (hyperbola)?
Boyle's Law
300
What says that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid?
Henry's Law
300
How do we find the molar mass of a substance?
Combine all of the atomic masses within that substance
400
How do you obtain the percent yield?
Divide the amount of product (grams) by the theoretical yield of product (grams)
400
How is evaporation a cooling process?
Evaporation is a cooling process because only the particles with the highest kinetic energy (temperature) leave, leaving the cooler particles behind
400
If you decrease the pressure of a gas by 1/2, what happens to the volume?
It doubles
400
How many grams of HCl are required to make 10L of a .4M solution?
144 g HCl
400
If a gas has an initial pressure of 7 atm at 64 mL, what is the final volume if the pressure is lowered to 4.5 atm?
99.556 mL
500
If we are given 50 moles of a substance, how many particles do we have of that substance?
3.01x10^25
500
Water can never be heated above 100 degrees Celsius. Why is this?
100 degrees Celsius is the boiling point of water, and once this is surpassed, it is no longer a liquid
500
If a gas has a pressure of 760 mmHg, and a temperature of -150 degrees Celsius and occupies 11 L of space, what will be the new volume (L) if the pressure changes to 1.067 and the temperature changes to 85K?
7.079
500
Explain a situation where a weak acid might have a lower pH than a strong acid.
A weak acid might have a lower pH than a strong acid if the strong acid is diluted
500
What is an example of a real world application of Gay-Lussac's Law?