Chemistry

Molarity, dilution, and acidity. Example: $0.01\text{M HCl}$ has $\text{pH}=2$.

8 questions

Counting atoms with moles plus $PV=nRT$. Example: 1 mol of ideal gas at STP occupies $22.4\text{L}$.

6 questions

How properties change across the periodic table. Example: atomic radius DECREASES left → right across a period.

9 questions

Acids, bases, oxides, and salts. Example: $\text{HCl}+\text{NaOH}\to \text{NaCl}+{\text{H}}_2\text{O}$.

12 questions

Identify groups like –OH, –COOH, –CHO. Example: ${\text{CH}}_3{\text{CH}}_2\text{OH}$ is an alcohol.

12 questions

How far and how fast a reaction goes. Example: $K_c=\frac{[\text{products}]}{[\text{reactants}]}$, raised to coefficients.

12 questions

Electron configurations and bond types. Example: $\text{Mg}$ is $1s^{2}2s^{2}2p^{6}3s^2$.

10 questions

Carbon–hydrogen compounds (alkanes, alkenes, alkynes). Example: propane ${\text{C}}_3{\text{H}}_8$ is an alkane ($C_n{H}_{2n+2}$).

11 questions

Spontaneity and electron transfer. Example: $\Delta G<0$ means spontaneous; LEO-GER for redox.

10 questions

Balancing and classifying reactions. Example: $2{\text{H}}_2+{\text{O}}_2\to 2{\text{H}}_2\text{O}$ (synthesis).

10 questions