Rockhurst Chem Fall Review 2024

Front

What do the coefficients in a balanced chemical equation represent?

Back

The coefficients represent the number of moles of each substance involved in the reaction.

Front

Which is larger: 100 mm, 10 dm, 10000 µm, or 10000000 pm?

Back

10 dm is the largest.

Front

How is the periodic table organized?

Back

The periodic table is organized by increasing number of protons.

Front

Balance the equation: __H2 + __ O2 --> ___H2O

Back

The balanced equation is 2H2 + 1O2 --> 2H2O.

Front

What is the chemical name for C2H4?

Back

C2H4 is called dicarbon tetrahydride.

Front

What is the definition of a mole in chemistry?

Back

A mole is a unit that measures the amount of substance, defined as exactly 6.022 x 10^23 particles.

Front

What is the significance of the atomic number?

Back

The atomic number indicates the number of protons in an atom's nucleus and determines the element's identity.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is the formula for calculating density?

Back

Density is calculated using the formula: Density = Mass/Volume.