Calculate the mass in atomic mass units of .25 mol of carbon-12 atoms.
I don't know how to set it up..
To calculate the mass in atomic mass units (amu) of a certain number of atoms, you need to know the atomic mass of the element and the number of atoms.
In this case, you want to determine the mass of 0.25 mol of carbon-12 atoms. The atomic mass of carbon-12 is exactly 12 amu.
To set up the calculation, you can use the conversion factor of 1 mol of carbon-12 atoms = 12 grams. This conversion factor allows you to convert between moles and grams.
Here's how you can solve it step by step:
Step 1: Start with the given quantity, which is 0.25 mol of carbon-12 atoms.
Step 2: Use the conversion factor, 1 mol carbon-12 atoms = 12 grams. This conversion factor allows you to convert from moles to grams.
0.25 mol carbon-12 atoms * (12 grams / 1 mol carbon-12 atoms) = 3 grams
Step 3: Now, convert from grams to atomic mass units (amu). Since 1 gram is approximately equal to 6.022 x 10^23 amu, you can use this conversion factor to convert from grams to amu.
3 grams * (6.022 x 10^23 amu / 1 gram) = 1.8066 x 10^24 amu
So, the mass of 0.25 mol of carbon-12 atoms is approximately 1.8066 x 10^24 amu.