I have to go to work this weekend so I'm trying to get my homework finished. Could you please help me figure out this question?
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)
a. 60.1 g/mol
b. 28.0 g/mol
c. 106.8 g/mol
d. 63.5 g/mol
Of course! I'd be happy to help you calculate the mass of each substance. To do this, we need to use the concept of molar mass.
1. Silicon dioxide (SiO2):
To calculate the molar mass of silicon dioxide (SiO2), we need to find the atomic masses of silicon (Si) and oxygen (O) and add them up. The atomic mass of silicon is 28.0855 g/mol, and the atomic mass of oxygen is 15.9994 g/mol. Since there are two oxygen atoms in SiO2, we multiply the atomic mass of oxygen by 2.
Molar mass of SiO2 = (atomic mass of Si) + (2 * atomic mass of O)
= (28.0855 g/mol) + (2 * 15.9994 g/mol)
= 60.0843 g/mol
So, the mass of 1.00 mol of silicon dioxide is 60.0843 grams.
2. Diatomic nitrogen (N2):
Diatomic nitrogen (N2) consists of two nitrogen atoms. The atomic mass of nitrogen is 14.0067 g/mol.
Molar mass of N2 = (2 * atomic mass of N)
= (2 * 14.0067 g/mol)
= 28.0134 g/mol
Therefore, the mass of 1.00 mol of diatomic nitrogen is 28.0134 grams.
3. Iron (|||) hydroxide (Fe(OH)3):
To find the molar mass of iron (|||) hydroxide (Fe(OH)3), we need to consider the atomic masses of iron (Fe), oxygen (O), and hydrogen (H). The atomic mass of iron is 55.845 g/mol, oxygen is 15.9994 g/mol, and hydrogen is 1.00784 g/mol.
Molar mass of Fe(OH)3 = (atomic mass of Fe) + (3 * atomic mass of O) + (3 * atomic mass of H)
= (55.845 g/mol) + (3 * 15.9994 g/mol) + (3 * 1.00784 g/mol)
= 106.867 g/mol
Hence, the mass of 1.00 mol of iron (|||) hydroxide is 106.867 grams.
4. Copper (Cu):
Copper (Cu) has an atomic mass of 63.546 g/mol. Therefore, the mass of 1.00 mol of copper is 63.546 grams.
I hope this helps! Let me know if there's anything else I can assist you with.