Front

What is the molar ratio of CO₂ to O₂ in the reaction: 2C₇H₆O₂ (s) + 15O₂ (g) → 14CO₂ (g) + 6H₂O (l)?

Back

14 mol CO₂ to 15 mol O₂.

Front

What is the correct name for the compound FeS?

Back

Iron (II) sulfide.

Front

How many electrons are in a Mg²⁺ ion?

Back

10 electrons.

Front

Calculate the molar mass of KOH. Round to the nearest whole number.

Back

56 g/mol.

Front

How many valence electrons does Beryllium have?

Back

2 valence electrons.

Front

What is the chemical formula for water?

Back

H₂O.

Front

Define the term 'molar mass'.

Back

The mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

What is the principle behind the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is the pH scale used for?

Back

To measure the acidity or basicity of a solution.

Front

What is the difference between an ionic bond and a covalent bond?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.