This number is the number of particles in one mole.
What is 6.02 x 10 23
100
This substance does the dissolving
What is solvent
100
Cutting something in two is what type of change?
What is physical
100
The substance that is the most soluble at zero degrees celsius.
What is KI, potassium iodide
200
A mixture containing large, dispersed solid particles that can settle out or be separated by filtration.
What is a suspension
200
How many grams of water, H2O, are there in 3.5 moles of water?
What is 63 grams
200
The molarity of .5 moles of solid dissolved in 0.025 L of solution.
What is 20 M
200
Wood burning in a fire pit is an example of this type of change.
What is chemical
200
This is the amount of NaNO3 needed to make a saturated solution at 70 degrees celsius.
What is 134 grams
300
A homogeneous mixture made of two or more substances.
What is a solution
300
There are this many particles of methane, CH4, in 0.25 moles of methane.
What is 1.51 x 10 23 particles
300
The molarity of 52.05 grams calcium hydroxide, Ca(OH)2, in 2.5 L of water.
What is 0.28 M
300
Mothballs that gradually vaporize in a closet is and example of what type of change?
What is physical
300
This is the temperature at which 70 g of ammonium chloride, NH4Cl, will dissolve.
What is 90 degrees Celsius
400
Matter in this state has no shape and fills its container completely.
What is gas?
400
There are this many molecules in 25 grams of NH3.
What is 8.85 x 10 23 molecules
400
The amount of grams of Li2S needed to make 5.5 L of a 1.2 M solution.
What is 303.27 grams
400
Gasoline is flammable. This is an example of what?
What is a chemical property
400
This type of solution is formed when 30 grams of potassium chloride, KCl, is dissolved in 100 g of water at 50 degrees celsius and no visible crystals are formed.
What is unsaturated.
500
The scattering of light as a light beam passes through a colloid or suspension
What is the Tyndall Effect
500
There are this many grams in 8.2 x 10 22 particles of N2I6.
What is 107.5 grams
500
Calculate the mass needed to make 500 ml of 0.50 M sodium nitrate, NaNO3.
What is 21.25 g
500
When an alkaseltzer tablet is put into water it "fizzes". This is an example of what type of change?
What is chemical.
500
This is the type of solution you get when 100 grams of ammonia, NH3, is added to 150 grams of water at 30 degrees celsius and no crystals are visible.