Question

Solve the following problems below. Do this in a separate sheet of paper.

1. Gold (Au) has been used to make ornamental objects and jewelry for thousands of years. Gold nuggets found in a stream are very easy to work and were probably
one of the first metals used by humans. (1 mol of Gold (Au) = 196.97g). Calculate the:
A. Number of moles in a 95.0 g sample of a gold nugget.

Answer 1

To calculate the number of moles in a 95.0 g sample of gold, divide the mass of the sample by the molar mass of gold (196.97 g/mol), which gives approximately 0.482 moles.

Step-by-step explanation:

The question requires the calculation of the number of moles of gold in a 95.0 g sample. Using the molar mass of gold (Au), which is 196.97 g/mol, we can determine the number of moles with the formula:

Number of moles (n) = mass of the sample (m) / Molar mass of gold (M)

Plugging in the values, we get:

Number of moles (n) = 95.0 g / 196.97 g/mol

This yields:

Number of moles (n) = 0.482 moles of gold (rounded to three decimal places).

Therefore, a 95.0 g sample of a gold nugget contains approximately 0.482 moles of gold.