Physical and Chemical Changes
The term to describe a change in which a substance transforms into a new substance with different properties and composition
Chemical Change
Finish the rest of the sentence: The law of conservation of mass states that __________________________.
Mass is neither created nor destroyed in a chemical or physical change
If two substances, A and B, are mixed together and substance A floats on top of B, it can be inferred that substance A has a ________ density compared to substance B.
Lower
Define Physical Property and give an example
When salt dissolves in water, this type of change occurs
Physical Change
When 12 grams of carbon reacts with 32 grams of oxygen to produce carbon dioxide, this is the mass of the carbon dioxide produced.
44 grams
Aluminum sinks in water but a cork floats. Which object has more compact matter?
Aluminum
Define Chemical property
A property of a substance that must be reacted with something to change its composition to observe
True or false: in a physical change, the reactants are the same as the products.
True
In a chemical reaction where 30 grams of A react with 20 grams of B to produce 45 grams of C and a certain amount of D, this would be the mass of D formed according to the Law of Conservation of Mass.
5 grams
A block of wood has a mass of 15 grams and occupies a volume of 50 cubic centimeters. What is its density?
0.3 g/cm^3
Identify 1 physical property and 1 chemical property: Iron is a gray metal that rusts when exposed to oxygen and moisture. It is magnetic and can be shaped into various forms when heated.
Physical: magnetic, gray, shaped into different forms
Chemical: rusts
This physical property depends on an object's mass and volume and is specific to a substance
Density
When a piece of wood undergoes combustion (burns) in an open system, the ashes weigh significantly less than the original wood. Using the Law of Conservation of Mass, explain the seeming loss of mass.
Gasses were produced
Two liquids are poured into separate beakers. Liquid A fills the beaker to a greater height than Liquid B, yet they both have the same mass. Which liquid has a higher density, and why?
Liquid B
Identify 2 physical properties and 1 chemical property: Copper is a reddish-brown metal that tarnishes when exposed to air over time. It is an excellent conductor of electricity and can be drawn into thin wires.
Physical: reddish-brown, conductor, drawn into wires
Chemical: tarnishes
A red colored liquid and a blue colored liquid are combined and the resulting liquid mixture is purple. Would this be a physical or chemical change?
Physical
If the law of conservation of mass holds true, how much sodium chloride will react with 34.0 g of silver nitrate to produce 17 g of sodium nitrate and 28.70 g of silver chloride?
11.7 grams
An irregular-shaped stone is placed in a graduated cylinder causing the water level to rise from 20 mL to 45 mL. If the mass of the stone is 75 grams, what is the stone's density?
3 g/mL
While making breakfast, Jamie cracked an egg into a hot skillet. The clear egg white turned white and solidified, and a pleasant aroma filled the kitchen. After cooking the egg, Jamie sprinkled some salt onto it, causing it to taste better. Later, Jamie took a piece of bread, and using a knife, cut it into two pieces to make a sandwich. Identify 2 physical changes and 2 chemical changes.
Physical: Sprinkling salt, cutting 2 pieces
Chemical: egg turned white, pleasant aroma