What is the reactant concentration, [HA], in HA ⇌ H⁺ + A^- , when [H⁺] = 0.010 M and K = 2.05?

A) 1.00 × 10^-4
B) 4.87 × 10^-5
C) 4.87 × 10^-3
D) 1.00 × 10^-3

How many base pairs are found in human mitochondrial DNA?

A) 2
B) 23
C) 16,569
D) 100,000

Draw a three-dimensional model of methanol, CH₃OH, including lone pairs of electrons using wedges, dashes and straight lines.