Asample of gold (au) has a mass of 57.01 g. a) calculate the number of moles of gold (au) in the sample. show your work and highlight your final answer. chemistry

Number of moles is 0.2894 moles Au

Given:

Mass of gold= 57.01 g  

To find:

Number of moles

Formula:

Molar mass of gold= 196.97 g/mol.

By substituting we get(57.01 g Au) / (196.97 g/moles) = 0.2894 moles Au  

Hence we get number of moles=0.2894 moles Au

Note: Molar mass= Mass of the sample of a compound/Total amount of that substance in that sample. Molar masses of different substances are the standard value which are specifically arranged to each compound

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