VOCABULARY BUILDERS
This term describes a homogeneous mixture
What is a solution?
This type of property can be observed without changing the composition of a substance.
What is a physical property
A substance cannot be separated into other substances by these kinds of means
What are physical means?
Boiling, freezing, condensing, and crushing are all examples of this type of change.
What is a physical change?
If 2 g of element X combines with 7 g of element Y to form compound XY, this many grams of Y are needed to form compound XY2
What is 14 g?
This law states that mass is neither created nor destroyed in a chemical reaction.
What is the law of conservation of mass
This type of property describes a substance's ability or tendency to change into another substance.
What is a chemical property?**
Iron, francium, nickel, phosphorus, and silicon are all examples of this type of pure substance.
What are elements?
Explode, corrode, tarnish, and ferment are all words that signal this type of change.
What is a chemical change?
A 20.0-g sample of sucrose contains 8.4 g of carbon. What is the mass percentage of carbon in sucrose.
What is 42.00%?
This law states that a compound is always composed of the same elements in the same proportion by mass, no matter the amount
What is the law of definite proportions
Melting point is classified as a physical property, and is it an intensive or extensive property?
What is intensive
Air is a common example of this type of mixture, which appears uniform throughout.
What is a homogeneous mixture?
This technique (or chromatography) is used to separate two substances with different boiling points.
What is distillation?
Mass percentage stays constant no matter the sample size. If the percentage of hydrogen in a 300-g sample of sucrose is 6.5%, what would be the percent in a smaller sample?
What is 6.50%?
This law states that different masses of one element combine with the same relative mass of another element to form different compounds.
What is the law of multiple proportions?**
Mass is classified as a physical property. Is it an intensive or extensive.
What is extensive?
A bowl of cereal, sidewalk pavement, and chocolate chip cookies are all examples of this type of mixture.
What is a heterogeneous mixture?
This technique is used to separate sand from water.
What is filtration?
A 36.0-g sample of water contains 4.0 g of hydrogen — this is the mass percentage of hydrogen in water.
What is 11%?
This separation technique results in the formation of pure solid particles from a solution.
What is crystallization?**
"Forms a green carbonate when exposed to air" and "does not react with nitrogen" are both examples of this type of property.
What is a chemical property?
Salt is a common example of this type of pure substance, made of two or more elements chemically combined.
What is a compound
Sterling silver (a copper and silver alloy) and black tea are both examples of this type of mixture.
What is a homogeneous mixture?
A 5.00-g sample of magnesium oxide is 60.3% magnesium by mass — this is the mass percentage of magnesium in a 150-g sample of magnesium oxide, since percent composition doesn't change with sample size.
What is 60.3%?