Front

What is the correct name for the compound with the formula (NH₄)₃PO₄?

Back

Ammonium Phosphate

Front

What is the empirical formula of a compound that is 18.8% sodium, 29.0% chlorine, and 52.2% oxygen?

Back

NaClO₄

Front

How do you determine the molecular formula from the empirical formula CH₂O and a molecular molar mass of 180.18?

Back

The molecular formula is C₆H₁₂O₆.

Front

What is the percent by mass of hydrogen in (NH₄)₃PO₄?

Back

8%.

Front

What is the oxidation state of chlorine in ClO⁻?

Back

+1.

Front

What is the definition of an empirical formula?

Back

An empirical formula represents the simplest whole-number ratio of atoms in a compound.

Front

How do you calculate percent by mass of an element in a compound?

Back

Percent by mass = (mass of element in 1 mole of compound / molar mass of compound) × 100.

Front

What is the significance of oxidation states in chemical compounds?

Back

Oxidation states indicate the degree of oxidation of an atom in a compound, helping to understand electron transfer in reactions.

Front

What is the difference between molecular formula and empirical formula?

Back

The molecular formula shows the actual number of atoms of each element in a molecule, while the empirical formula shows the simplest ratio.

Front

How do you find the molar mass of a compound?

Back

Add the atomic masses of all the atoms in the molecular formula.