An atom of bromine has a mass about four times greater than that of an atom of neon. How many grams of neon will contain the same number of atoms as 1,000 g of bromine
A) 4 g Ne
B) 250 g Ne
C) 400 g Ne
D) 1,000 g Ne
E) 4,000 g Ne

Question

Quizplus · Accepted Answer

The number of atoms in a given amount of substance is determined by Avogadro's number, which is constant for one mole of any substance. Since the mass of bromine is about four times greater than that of neon, to have the same number of atoms, you would need a quarter of the mass of bromine in neon. Therefore, 1,000 g of bromine would have the same number of atoms as 250 g of neon.

An Atom of Bromine Has a Mass About Four Times