Chemistry Exam Review #1

Front

What is the balanced chemical equation for the combustion of methane?

Back

CH₄ + 2O₂ → CO₂ + 2H₂O

Front

What is the mole ratio of CH₄ to O₂ in the combustion of methane?

Back

1 mole of CH₄ reacts with 2 moles of O₂.

Front

Which compound is soluble in water: aluminum sulfide, calcium carbonate, iron(III) hydroxide, or potassium sulfate?

Back

Potassium sulfate is soluble in water.

Front

What is the average atomic mass of an element with an atomic mass of 10.8 amu?

Back

10.8 amu is the average atomic mass.

Front

What is the chemical formula for magnesium iodide?

Back

MgI₂

Front

What is the correct name for H₂SO₄?

Back

Sulfuric acid.

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 10²³ particles.

Front

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

Back

An ionic bond is formed by the transfer of electrons, while a covalent bond is formed by the sharing of electrons.

Front

What is the pH range of acidic solutions?

Back

The pH range of acidic solutions is less than 7.

Front

What is the law of conservation of mass?

Back

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