Which statement describes a chemical property
of sodium?
(1) sodium has a melting point of 371 k.
(2) sodium has a molar mass of 23 grams.
(3) sodium can conduct electricity in the liquid
phase.
(4) sodium can combine with chlorine to produce
a salt.

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

Compare and contrast refraction of light and sound will give brainliest