Calculate the number of moles in 3.20 g of each of the following:
Au
Express your answer in Moles
To calculate the number of moles in a sample, you need to divide the mass of the sample by its molar mass.
The molar mass of gold (Au) is 196.97 g/mol.
Using the formula:
Number of moles = Mass of sample / Molar mass
For Au:
Number of moles = 3.20 g / 196.97 g/mol
Calculating this:
Number of moles = 0.01625 mol (rounded to 5 decimal places)
Therefore, there are approximately 0.01625 moles in 3.20 g of Au.
To calculate the number of moles in a given mass of a substance, we need to use the formula:
moles = mass / molar mass
First, we need to determine the molar mass of gold (Au). The molar mass of Au is 196.97 g/mol.
For 3.20 g of Au:
moles = 3.20 g / 196.97 g/mol
moles ≈ 0.016 mol
Therefore, there are approximately 0.016 moles of Au in 3.20 g.
To calculate the number of moles in a given mass of a substance, we need to use the formula:
moles = mass (g) / molar mass (g/mol)
First, let's find the molar mass of gold (Au). The molar mass of gold is equal to its atomic mass, which is found on the periodic table. The atomic mass of gold is approximately 197 g/mol.
Now, we can calculate the number of moles of gold (Au) using the given mass of 3.20 g:
moles = 3.20 g / 197 g/mol
moles ≈ 0.0162 mol
Therefore, the number of moles in 3.20 g of gold (Au) is approximately 0.0162 mol.