Physical and Chemical Properties/Changes
Characteristics that can be observed or measured without altering a substance's composition
What are physical properties?
These pure substances consist of only one type of atom and cannot be broken down by chemical means
What are elements?
Saltwater and air are examples of this type of mixture with a uniform composition throughout
What is a homogeneous mixture?
This law states that mass is neither created nor destroyed during chemical reactions in a closed system
What is the Law of Conservation of Mass?
Color, density, and solubility belong to this group of observable traits that do not alter a substance's composition
What are physical properties?
Tearing paper and melting ice are examples of this type of change, which alters physical appearance without changing chemical composition
What is a physical change?
Pure substances composed of two or more elements chemically bonded together in fixed ratios, such as water
What are compounds?
Salad dressing and a mixture of oil and water are examples of this non-uniform mixture type
What is a heterogeneous mixture?
According to the Law of Conservation of Mass, the total mass of starting reactants before a reaction equals the total mass of these substances formed after
What are products?
Despite surrounding us everywhere, this atmospheric blend is classified as a homogeneous mixture rather than a chemical compound
What is air?
Flammability, toxicity, and the ability of iron to rust belong to this class of properties
What are chemical properties?
Combinations of two or more substances that are physically mixed together rather than chemically bonded
What are mixtures?
Because its components are evenly distributed throughout, tap water or a glass of sweetened iced tea falls into this mixture category
What is a homogeneous mixture?
If 50 grams of hydrogen gas react completely with 400 grams of oxygen gas, this is the expected total mass of the water produced
What is 450 grams?
Luster, yellow color, and high density are observable physical properties of this precious metallic element
What is gold?
Burning wood, digesting food, and baking bread are examples of this process that creates new substances with different chemical properties
What is a chemical change?
These two chemical elements are the constituent elements that combine to form the compound H2O
What are hydrogen and oxygen?
Orange juice with pulp and granite rock belong to this mixture classification
What is a heterogeneous mixture?
Mathematically, the Law of Conservation of Mass is written as the mass of reactants equals this
What is the mass of the products?
In a chemical reaction equation like the starting substances listed on the left side are known by this term
What are reactants?
Boiling water is an example of this type of change.
What is a physical change?
Salt is an example of this type of matter.
What is a compound?
List four ways to physically separate a mixture.
What are filtration, evaporation, magnetism, straining
To ensure that total mass is conserved and no matter escapes or enters during a chemical reaction, the reaction must occur within this type of setup
What is a closed system?
The 2 in H2O is known as this.
What is a subscript?