Test - Unit 2 Matter Flashcards
Matter that has a definite volume in a definite shape is a
Gas
Burning gasoline, rotting of an egg , and exploding fireworks are examples of what
Physical change
Is another name for a homogeneous mixture
Suspension
In which phase of matter are the molecules of the substance farthest apart from each other
Gas
A flask containing molecules of gas a in a separate flask containing Molecules of gas B are both at the same temperature. Gases a & b must have equal what
Average kinetic energies
Hydrogen , gold , and iron are all examples of what
Elements
What shows the Tyndall effect
Colloids
The particles in a liquid are usually
Closer together and lower in energy than in a gas
Salt water and lemonade
Homogeneous mixture
Trail mix, salad dressing, peanut butter
Heterogeneous mixtures
How many grams of NaC1O3 or added to make a saturated solution in 100 g of water at 90°C
180 g
Rusting of a fishing pole
Chemical change
Boiling water
Physical change
In terms of saturation how would you classify a KNO3 solution of 30 g in water at 40°C
Unsaturated
The solubility of which salt is the least affected by temperature
NaCl
Iron and oxygen react to form rest. What will happen to the mass of the rest compared to the mass of the iron and oxygen for the reaction? Explain why this will occur
It will be the same because law of conservation of mass says matter cannot be created or destroyed even in a chemical change
