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.) 102
b.) 64
c.) 198
d.) 34
Please check them
How do you figure it out? That's what I'm asking.
Sure, I'd be happy to help you with that! To calculate the mass of a substance, you need to know the molar mass of the substance. The molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol).
Let's calculate the mass of each substance you mentioned:
a.) Silicon dioxide (SiO2):
To calculate the molar mass of silicon dioxide (SiO2), you need to find the atomic masses of silicon (Si) and oxygen (O) from the periodic table. 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 silicon dioxide, you multiply the atomic mass of oxygen by 2.
Molar mass of silicon dioxide (SiO2) = (1 * atomic mass of silicon) + (2 * atomic mass of oxygen)
Molar mass of silicon dioxide (SiO2) = (1 * 28.0855 g/mol) + (2 * 15.9994 g/mol)
b.) Diatomic nitrogen (N2):
The diatomic nitrogen molecule (N2) consists of two nitrogen atoms. To calculate the molar mass of diatomic nitrogen, you need the atomic mass of nitrogen (N) from the periodic table.
Molar mass of diatomic nitrogen (N2) = (2 * atomic mass of nitrogen)
c.) Iron (|||) hydroxide (Fe(OH)3):
To calculate the molar mass of iron (III) hydroxide (Fe(OH)3), you need to find the atomic masses of iron (Fe), oxygen (O), and hydrogen (H) from the periodic table. The atomic mass of iron is 55.845 g/mol, the atomic mass of oxygen is 15.9994 g/mol, and the atomic mass of hydrogen is 1.0078 g/mol.
Molar mass of iron (III) hydroxide (Fe(OH)3) = (1 * atomic mass of iron) + (3 * atomic mass of oxygen) + (3 * atomic mass of hydrogen)
d.) Copper (Cu):
To calculate the molar mass of copper (Cu), you need to find the atomic mass of copper from the periodic table.
Molar mass of copper (Cu) = atomic mass of copper
By calculating these molar masses, you will determine the mass of 1.00 mole of each substance. Just substitute the values of atomic masses into the formulas above and perform the calculations to find the molar masses.