Semester Review #4: Unit 7 & 8 : Chemical Composition & Rxns

Front

What is the molar mass of carbon?

Back

12.0 g/mol

Front

What type of reaction involves two or more elements combining to form a more complex compound?

Back

Synthesis

Front

How many NO3 polyatomic ions are in Mg(NO3)2?

Back

2

Front

What is the mass of Iron (Fe) from the periodic table?

Back

55.85 g/mol

Front

The molar mass of an element is the mass of one ____ of the element, with numbers taken from the mass number on the periodic table.

Back

mole

Front

What is the definition of a mole in chemistry?

Back

A mole is a quantity that contains 6.022 x 10^23 particles (atoms, molecules, etc.).

Front

What is the formula for calculating molar mass?

Back

Molar mass = mass of element (g) / amount of substance (mol).

Front

What is a decomposition reaction?

Back

A reaction where a single compound breaks down into two or more simpler products.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.