Question

how the mass number of chlorine is 71?
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Answer 1

Answer:

Hope this helps you.

Explanation:

The chemical formula for the chlorine molecule (chlorine gas or diatomic chlorine) is Cl2, which means it is composed of two chemically bonded chlorine atoms. The mass of one mole of chlorine gas is its molar mass, and can be determined by multiplying its subscript by the molar mass of chlorine (atomic weight on the periodic table in g/mol), which is 35.45 g/mol.

MMCl2=(2×35.45 g/mol Cl)=71 g/mol (rounded to two significant figures)

Answer 2

Answer:

of 71?

Lutetium

Name Lutetium

Atomic Mass 174.967 atomic mass units

Number of Protons 71

Number of Neutrons 104