Chem 1 Unit 9 Review 2024

Front

What is the empirical formula?

Back

A formula with the lowest whole number ratio of elements in a compound.

Front

How many moles are in 6 g of Carbon?

Back

0.5 moles of C.

Front

What does the coefficient in a chemical equation represent?

Back

The big number that tells you the number of molecules.

Front

What is the molar mass of NaOH?

Back

40 g/mol.

Front

What is the percentage composition of Mg in Mg3(PO4)2?

Back

27.75% Mg.

Front

Define molecular formula.

Back

A formula that shows the actual number of atoms of each element in a molecule.

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements.

Front

How do you calculate molar mass?

Back

Add the atomic masses of all atoms in the formula.

Front

What is the significance of the subscript in a chemical formula?

Back

It indicates the number of atoms of each element in a molecule.

Front

What is the difference between empirical and molecular formulas?

Back

Empirical formula shows the simplest ratio, while molecular formula shows the actual number of atoms.