what is the mass of 1.22x10^23 molcules of carbon dioxide(co2) and silicon dioxide(Sio2)?
1)divide 1.22x10^23 molecules by Avogadro's number to convert to moles
2)multiply by molar mass of CO2 to convert to grams
(1.22x10^23 molecules)(1mol/6.022x10^23 molecules CO2)(___g CO2/1mol)
To calculate the mass of a given number of molecules, we need to know the molar mass of the respective compound. The molar mass of a compound is the mass of one mole of that compound and is expressed in grams per mole (g/mol).
To find the molar mass of carbon dioxide (CO2), we need to determine the atomic masses of carbon (C) and oxygen (O) and then multiply them by the number of respective atoms in the compound.
The atomic mass of carbon (C) is approximately 12.01 g/mol, and oxygen (O) has an atomic mass of approximately 16.00 g/mol. Since there are two oxygen atoms in carbon dioxide, we multiply the atomic mass of oxygen by 2.
Molar mass of carbon dioxide (CO2):
= (atomic mass of carbon) + (2 * atomic mass of oxygen)
= 12.01 g/mol + (2 * 16.00 g/mol)
= 12.01 g/mol + 32.00 g/mol
= 44.01 g/mol
Now, we can use the molar mass of carbon dioxide to calculate the mass of 1.22x10^23 molecules.
Mass = (number of molecules) * (molar mass of CO2)
Mass of 1.22x10^23 molecules of carbon dioxide:
= 1.22x10^23 * 44.01 g/mol
Similarly, to calculate the mass of 1.22x10^23 molecules of silicon dioxide (SiO2), we need to find its molar mass. The molar mass of silicon (Si) is approximately 28.09 g/mol, and oxygen (O) is 16.00 g/mol.
Molar mass of silicon dioxide (SiO2):
= (atomic mass of silicon) + (2 * atomic mass of oxygen)
= 28.09 g/mol + (2 * 16.00 g/mol)
= 44.09 g/mol
Mass of 1.22x10^23 molecules of silicon dioxide:
= 1.22x10^23 * 44.09 g/mol
By performing these calculations, you will be able to find the mass of 1.22x10^23 molecules of carbon dioxide (CO2) and silicon dioxide (SiO2).