Calculate the mass of 1.00 mol of each of these substances:

a.) silicon dioxide (SiO2)
b.) diatomic nitrogen (N2)
c.) iron (|||) hydroxide (Fe(OH)3)
d.) copper (Cu)

To calculate the mass of substances, you need to know their molar mass. The molar mass is the mass of one mole of a substance and is equal to the atomic masses of all the atoms in the formula.

a) Silicon dioxide (SiO2):
The molar mass of silicon (Si) is 28.0855 g/mol, and the molar mass of oxygen (O) is 15.999 g/mol. Since there are two oxygen atoms in silicon dioxide, we multiply the molar mass of oxygen by 2:
Molar mass of SiO2 = molar mass of Si + (2 * molar mass of O)
= 28.0855 g/mol + (2 * 15.999 g/mol)
= 60.0845 g/mol

So, the mass of 1.00 mol of silicon dioxide is 60.0845 g.

b) Diatomic nitrogen (N2):
The molar mass of nitrogen (N) is 14.007 g/mol. But since the formula N2 represents two nitrogen atoms bonded together (diatomic), we multiply the molar mass of nitrogen by 2:
Molar mass of N2 = 2 * molar mass of N
= 2 * 14.007 g/mol
= 28.014 g/mol

Therefore, the mass of 1.00 mol of diatomic nitrogen is 28.014 g.

c) Iron(III) hydroxide (Fe(OH)3):
The molar mass of iron (Fe) is 55.845 g/mol, the molar mass of oxygen (O) is 15.999 g/mol, and the molar mass of hydrogen (H) is 1.008 g/mol. There are three oxygen atoms and three hydrogen atoms in one formula unit of iron(III) hydroxide:
Molar mass of Fe(OH)3 = molar mass of Fe + (3 * molar mass of O) + (3 * molar mass of H)
= 55.845 g/mol + (3 * 15.999 g/mol) + (3 * 1.008 g/mol)
= 106.867 g/mol

So, the mass of 1.00 mol of iron(III) hydroxide is 106.867 g.

d) Copper (Cu):
The molar mass of copper (Cu) is 63.546 g/mol.

Therefore, the mass of 1.00 mol of copper is 63.546 g.

To calculate the mass of a substance, we need to know the molar mass of the substance. The molar mass is defined as the mass of one mole of a substance and is expressed in grams per mole (g/mol).

a) Silicon Dioxide (SiO2):
To calculate the molar mass of SiO2, we add the molar masses of silicon (Si) and oxygen (O):
Molar mass of Si: 28.09 g/mol
Molar mass of Oxygen (O): 16.00 g/mol (since there are two oxygen atoms in SiO2, we multiply by 2)
Now, we can calculate the molar mass of SiO2:
Molar mass of SiO2 = (28.09 g/mol) + (16.00 g/mol * 2) = 60.09 g/mol

To calculate the mass of 1.00 mol of SiO2, simply multiply the molar mass by the number of moles:
Mass of SiO2 = 1.00 mol * 60.09 g/mol = 60.09 g

b) Diatomic Nitrogen (N2):
Since N2 is a diatomic molecule, we only need to consider the molar mass of nitrogen:
Molar mass of Nitrogen (N): 14.01 g/mol

To calculate the mass of 1.00 mol of N2, multiply the molar mass by the number of moles:
Mass of N2 = 1.00 mol * 14.01 g/mol = 14.01 g

c) Iron (|||) Hydroxide (Fe(OH)3):
To calculate the molar mass of Fe(OH)3, we add the molar masses of iron (Fe), oxygen (O), and hydrogen (H):
Molar mass of Iron (Fe): 55.85 g/mol
Molar mass of Oxygen (O): 16.00 g/mol (since there are three oxygen atoms in Fe(OH)3, we multiply by 3)
Molar mass of Hydrogen (H): 1.01 g/mol (since there are three hydrogen atoms in Fe(OH)3, we multiply by 3)

Now, we can calculate the molar mass of Fe(OH)3:
Molar mass of Fe(OH)3 = (55.85 g/mol) + (16.00 g/mol * 3) + (1.01 g/mol * 3) = 106.87 g/mol

To calculate the mass of 1.00 mol of Fe(OH)3, multiply the molar mass by the number of moles:
Mass of Fe(OH)3 = 1.00 mol * 106.87 g/mol = 106.87 g

d) Copper (Cu):
To calculate the molar mass of Cu, we look up the atomic mass of copper from the periodic table, which is 63.55 g/mol.

To calculate the mass of 1.00 mol of Cu, multiply the molar mass by the number of moles:
Mass of Cu = 1.00 mol * 63.55 g/mol = 63.55 g

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