Calculate formula units in 292.5 g sodium chloride
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To calculate the formula units in 292.5 g of sodium chloride (NaCl), we need to know the molar mass of NaCl.
The molar mass of NaCl is calculated by adding the atomic masses of sodium (Na) and chlorine (Cl):
Molar mass of NaCl = (mass of Na) + (mass of Cl)
Molar mass of NaCl = (22.99 g/mol) + (35.45 g/mol)
Molar mass of NaCl = 58.44 g/mol
Now, we can use the molar mass to calculate the number of moles of NaCl:
Number of moles = mass / molar mass
Number of moles = 292.5 g / 58.44 g/mol
Number of moles = 5 moles
Since 1 mole equals 6.02 x 10^23 formula units (Avogadro's number), we can calculate the number of formula units:
Number of formula units = number of moles x Avogadro's number
Number of formula units = 5 moles x 6.02 x 10^23 formula units/mole
Number of formula units = 3.01 x 10^24 formula units
Therefore, there are 3.01 x 10^24 formula units in 292.5 g of sodium chloride.
To calculate the formula units in 292.5 g of sodium chloride, we need to use the molar mass of sodium chloride and Avogadro's number.
The molar mass of sodium chloride (NaCl) is calculated by adding the atomic masses of sodium (Na) and chlorine (Cl):
Na: 22.99 g/mol
Cl: 35.45 g/mol
So, the molar mass of NaCl is 22.99 g/mol + 35.45 g/mol = 58.44 g/mol.
To calculate the number of moles in 292.5 g of sodium chloride, we divide the given mass by the molar mass:
Number of moles = mass / molar mass
= 292.5 g / 58.44 g/mol
= 5 moles
Since 1 mole of a substance contains Avogadro's number (6.022 × 10^23) of formula units, we can calculate the number of formula units by multiplying the number of moles by Avogadro's number:
Number of formula units = Number of moles × Avogadro's number
= 5 moles × 6.022 × 10^23 formula units/mole
= 3.011 × 10^24 formula units
Therefore, there are approximately 3.011 × 10^24 formula units in 292.5 g of sodium chloride.