A 30.84 cm^3 volume of 0.128M NaOH is required to reach the phenolphthalein endpoint in the titration of a 5.441g sample of vinegar. calculate the percentage of acetic acid in the vinegar.

Iknow #2 is d. i just need to know why

Element before carbon on the periodic table

The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf.the lattice energy increases as the cations get larger, as shown by lif and licl.the lattice energy decreases as cations get smaller, as shown by nacl and naf.the lattice energy decreases as the cations get smaller, as shown by naf and kf.