Calculate the number of g-atoms in 3.5g nitrogen
To calculate the number of g-atoms in a given mass of an element, we need to use Avogadro's number and the atomic mass of the element.
The atomic mass of nitrogen (N) is approximately 14.01 g/mol, and Avogadro's number is approximately 6.022 x 10^23 g/mol.
To calculate the number of g-atoms in 3.5g of nitrogen, we can use the following steps:
1. Determine the molar mass of nitrogen: The molar mass of nitrogen is 14.01 g/mol.
2. Convert the given mass of nitrogen to moles: Divide the given mass (3.5g) by the molar mass (14.01g/mol).
3.5g / 14.01g/mol = 0.2498 mol (rounded to four decimal places)
3. Calculate the number of g-atoms: Multiply the number of moles by Avogadro's number.
0.2498 mol x (6.022 x 10^23 g/mol) = 1.503 x 10^23 g-atoms (rounded to three significant figures)
Therefore, there are approximately 1.503 x 10^23 g-atoms in 3.5g of nitrogen.