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Chapter 3: Problem 28

If the mass of a gold atom is 196.97 amu, what is the atom's molar mass?

Short Answer

Expert verified
The molar mass of a gold atom is 196.97 g/mol.

Step by step solution

01

Understand the relation between amu and g/mol.

In chemistry, it is important to note that the atomic mass of an element, expressed in atomic mass units (amu), is numerically the same as the molar mass of the element, expressed in grams/mol. For example, the atomic mass of carbon-12 is 12 amu and the molar mass of carbon-12 is 12 g/mol.
02

Convert atomic mass to molar mass

Since the molar mass and atomic mass are numerically the same but in different units, to find the molar mass of a gold atom, simply change the units. From the problem, we know that a gold atom has a mass of 196.97 amu. Therefore, the molar mass of a gold atom is 196.97 g/mol.

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