Questions 7 - 9 refer to the information below. Someone selling 24-karat (pure) gold could be easily checked, since the density of 24-karat gold
is 19.3 g/cm", the density of 22-karat gold is 17.7 g/cm and the density of 18-karat gold only
15.5/cm.
A gold ring was purchased from a street vendor for a ridiculously low price. The buyer has brought
the ring to confirm its metal content. You have found the mass of the ring to be 23.0 g and its
volume to be 2.25 cm
7 Determine the density of the gold ring.
Please someone help me with this question it’s due tomorrow.

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.

Exit what is the density of an object having a mass of 5.0 g and a volume of 45.0 cm3?

Which statement is actually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.