Chemistry Final Exam Review

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

Calculate the mass of 4.55 mol of C₂H₆.

Back

137 g.

Front

How many significant figures are in the number 1.100 g?

Back

4 significant figures.

Front

Which element is in the same period as phosphorus?

Back

Magnesium.

Front

How many protons are in Neon?

Back

10 protons.

Front

Define molar mass.

Back

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

Front

What is the formula to calculate the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the significance of significant figures in measurements?

Back

Significant figures indicate the precision of a measurement.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number, showing periodic trends.

Front

Define a chemical reaction.

Back

A process that leads to the transformation of one set of chemical substances to another.