Final Review

Front

What is an Arrhenius acid?

Back

An Arrhenius acid is a substance that increases the concentration of hydrogen ions (H⁺) in aqueous solution.

Front

What is an Arrhenius base?

Back

An Arrhenius base is a substance that increases the concentration of hydroxide ions (OH⁻) in aqueous solution.

Front

What is the full electronic configuration for nitrogen?

Back

1s² 2s² 2p³

Front

How do you calculate percent by mass concentration?

Back

Percent by mass = (mass of solute / mass of solution) × 100%.

Front

What is the percent by mass of 0.62 g of solute in 45.0 g of solution?

Back

1.4 %.

Front

How do you convert moles to grams?

Back

Use the formula: grams = moles × molar mass.

Front

What is the molar mass of Li₂O?

Back

The molar mass of Li₂O is approximately 29.88 g/mol.

Front

Convert 3.50 moles of Li₂O to mass.

Back

105 g.

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision.

Front

How do you determine the number of significant figures in a calculation?

Back

Follow the rules: 1) Non-zero digits are always significant. 2) Any zeros between significant digits are significant. 3) Leading zeros are not significant. 4) Trailing zeros in a decimal number are significant.