A gold nugget weighs 65.0 g. How many moles of gold are in the nugget?
I got 12800 moles is this right?
Not quite.
moles Au = grams/atomic mass.
To determine the number of moles of gold in the nugget, you need to use the molar mass of gold. The molar mass of an element is the mass in grams of one mole of atoms of that element. The molar mass of gold is 197.0 g/mol.
To find the number of moles, you can use the formula:
Number of moles = Mass of the substance (in grams) / Molar mass
In this case, the mass of the gold nugget is 65.0 g, and the molar mass of gold is 197.0 g/mol.
Let's calculate:
Number of moles = 65.0 g / 197.0 g/mol
Number of moles = 0.330 moles (rounded to three decimal places)
So, the correct answer is 0.330 moles of gold in the nugget. Therefore, your initial calculation of 12800 moles is incorrect.