PRACTICE Bonding / Nomenclature Test

Front

What is percent composition by mass?

Back

Percent composition by mass is the percentage by mass of each element in a compound, calculated by dividing the mass of the element by the total mass of the compound and multiplying by 100.

Front

How do you calculate the percent composition of oxygen in MgSO4?

Back

To calculate the percent composition of oxygen in MgSO4, divide the total mass of oxygen in the compound (4 x 16 g/mol = 64 g/mol) by the molar mass of MgSO4 (120 g/mol) and multiply by 100. (64/120) x 100 = 53%.

Front

What is the percent by mass of oxygen in MgO?

Back

In MgO, the molar mass of oxygen is 16 g/mol and magnesium is 24 g/mol. The total mass of MgO is 40 g/mol. The percent by mass of oxygen is (16/40) x 100 = 40%.

Front

What type of bond is formed between a metal and a non-metal?

Back

Ionic bond.

Front

What is the formula for Sodium Chloride?

Back

NaCl.

Front

What is the formula for perchloric acid?

Back

HClO4.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond that occurs when electrons are transferred from one atom to another, typically between a metal and a non-metal.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons and the attraction between oppositely charged ions, while covalent bonds involve the sharing of electrons between atoms.

Front

What is the significance of chemical formulas?

Back

Chemical formulas provide information about the types and numbers of atoms in a compound, allowing for the understanding of its composition and properties.

Front

How do you determine the formula of a compound from its elements?

Back

To determine the formula of a compound, identify the elements involved, their valences, and combine them in a way that balances the total charge.