If you had 5 grams of Na and 5 grams of Br, which would have more atoms
To determine which sample, 5 grams of Na or 5 grams of Br, has more atoms, we need to first calculate the number of moles for each element using their respective atomic masses. Then, we can use Avogadro's number to determine the number of atoms in each sample.
Step 1: Calculate the number of moles of each element
To do this, we need to divide the given mass by the molar mass of the element. The molar mass of an element is the mass of one mole of that element.
The atomic mass of Na (sodium) is approximately 23 g/mol.
The atomic mass of Br (bromine) is approximately 80 g/mol.
For Na:
Number of moles = Mass of Na / Molar mass of Na
Number of moles = 5 g / 23 g/mol
For Br:
Number of moles = Mass of Br / Molar mass of Br
Number of moles = 5 g / 80 g/mol
Step 2: Calculate the number of atoms
We can use Avogadro's number, which states that there are 6.022 x 10^23 atoms in one mole of any substance.
For Na:
Number of atoms of Na = Number of moles of Na × Avogadro's number
For Br:
Number of atoms of Br = Number of moles of Br × Avogadro's number
Step 3: Compare the number of atoms in each sample
Compare the calculated number of atoms for Na and Br. The element with a greater number of atoms will have more atoms in the given mass.
By following these steps, you can determine which sample, 5 grams of Na or 5 grams of Br, has more atoms.