12 which step would a student find the molecular formula of a compound from the empirical formula?
a. multiply the ratio of the actual mass of the compound to the empirical formula mass by the subscripts of the empirical formula.
b. subtract the ratio of the actual mass of the compound to the empirical formula mass from the subscripts of the empirical formula.
c. divide the ratio of the actual mass of the compound to the empirical formula mass by the subscripts of the empirical formula.
d. add the ratio of the actual mass of the compound to the empirical formula mass to the subscripts of the empirical formula.

A. Multiply the ratio of the actual mass of the compound to the empirical formula mass by the subscripts of the empirical formula.

Explanation:

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.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.