If empirical formula and molar mass of a compound is P2O5 and 142 respectively. the molecular formula of the compound will be

molecular formula = molar mass ÷ empirical formula

n = 142 ÷ 142

n = 1

molecular formula (P2O5)1 = P2O5

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

it's c (engineer's do their work with mechanical stuff not on any living being)