how many moles if gold are present in 49 gram of gold

To determine the number of moles of gold in a given mass, you need to use the formula:

Moles = Mass (g) / molar mass (g/mol)

The molar mass of gold can be found on the periodic table, which is 196.97 g/mol for gold (Au).

Now, let's calculate the number of moles of gold in 49 grams:

Moles = 49 g / 196.97 g/mol

Moles = 0.248 moles

So, there are approximately 0.248 moles of gold present in 49 grams.