i need to convert the following number of atoms into grams
d. 1 million atoms of Br bromine
e. 3x10^23 atoms of Ne neon
There are 6.02 x 10^23 atoms in a mole of atoms. A mole of Br atoms has a mass of ??. Look it up on the periodic table. It is about 80 I think. Ne is about 20. This information will work both of the problems. Post your work if you get stuck.
To convert the number of atoms into grams, you need to use the concept of molar mass. Molar mass is the mass of one mole of a substance, and it is expressed in grams/mole.
Here are the steps to convert the number of atoms into grams:
d. 1 million atoms of Br bromine
1. Find the molar mass of bromine (Br) by looking up its atomic mass on the periodic table. The atomic mass of bromine is approximately 79.904 g/mol.
2. Divide the given number of atoms (1 million) by Avogadro's number, which is 6.022 × 10^23 atoms/mol. This will give you the number of moles.
Number of moles = (1 million atoms) / (6.022 × 10^23 atoms/mol)
3. Multiply the number of moles by the molar mass of bromine to get the mass in grams.
Mass in grams = Number of moles * Molar mass
Substituting the values:
Mass in grams = [(1 million atoms) / (6.022 × 10^23 atoms/mol)] * 79.904 g/mol
Calculate this expression to get the mass in grams.
e. 3 x 10^23 atoms of Ne neon
1. Find the molar mass of neon (Ne) from the periodic table. Neon has an atomic mass of 20.180 g/mol.
2. Divide the given number of atoms (3 x 10^23) by Avogadro's number (6.022 × 10^23 atoms/mol) to find the number of moles.
Number of moles = (3 x 10^23 atoms) / (6.022 × 10^23 atoms/mol)
3. Multiply the number of moles by the molar mass of neon to get the mass in grams.
Mass in grams = Number of moles * Molar mass
Substituting the values:
Mass in grams = [(3 x 10^23 atoms) / (6.022 × 10^23 atoms/mol)] * 20.180 g/mol
Calculate this expression to get the mass in grams.