Select the correct statement below.

(a) the percent composition (by mass) is the same for each element in that compounds empirical and molecular formulas.
(b) three different compounds having the same percent composition and the same molar mass will also have the same empirical formula.
(c) an element with the largest atomic mass is always the element present in the highest percentage by mass in a compound.
(d) a and b are correct
(e) a, b, and c are correct

A and B are correct.

Explanation:

As the mole ratio of elements in a compound are same in empirical formula and molecular formula, the mass percentage is also the same in both the formulas. So the statement is correct.

The compounds with same molecular formula will have same empirical formula as well.

It is not compulsory that element present in the highest percentage by mass in a compound. It depends upon the number of atoms of the element present in the compound.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock