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.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

gas

explanation:

smoke is the matter of a gas

it is a solid

explanation:

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.