how many grams are contained in 0.50 mol of each compound? HCl Na2SO4
C2H2 and Al(OH)3?
moles = grams/molar mass.
You know moles and molar mass or can look them up, solve for grams.
To find the number of grams contained in a certain number of moles of a compound, you need to know the molar mass of the compound.
The molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol). To calculate the molar mass of a compound, you need to sum up the atomic masses of all the atoms present in the compound, taking into account the subscripts.
1. HCl (Hydrogen Chloride):
The molar mass of hydrogen (H) is approximately 1.01 g/mol, and the molar mass of chlorine (Cl) is approximately 35.45 g/mol. Since there is only one H atom and one Cl atom in HCl, the molar mass of HCl is:
(1 * 1.01 g/mol) + (1 * 35.45 g/mol) = 36.46 g/mol
To find the number of grams in 0.50 mol of HCl, you multiply the number of moles (0.50 mol) by the molar mass (36.46 g/mol):
0.50 mol * 36.46 g/mol = 18.23 grams
Therefore, 0.50 mol of HCl is equivalent to 18.23 grams.
2. Na2SO4 (Sodium Sulfate):
The molar mass of sodium (Na) is approximately 22.99 g/mol, the molar mass of sulfur (S) is approximately 32.06 g/mol, and the molar mass of oxygen (O) is approximately 16.00 g/mol. Since there are two Na atoms, one S atom, and four O atoms in Na2SO4, the molar mass is:
(2 * 22.99 g/mol) + (1 * 32.06 g/mol) + (4 * 16.00 g/mol) = 142.04 g/mol
To find the number of grams in 0.50 mol of Na2SO4, you multiply the number of moles (0.50 mol) by the molar mass (142.04 g/mol):
0.50 mol * 142.04 g/mol = 71.02 grams
Therefore, 0.50 mol of Na2SO4 is equivalent to 71.02 grams.
Now, let's move on to the other compounds.
3. C2H2 (Ethyne):
The molar mass of carbon (C) is approximately 12.01 g/mol, and the molar mass of hydrogen (H) is approximately 1.01 g/mol. Since there are two C atoms and two H atoms in C2H2, the molar mass is:
(2 * 12.01 g/mol) + (2 * 1.01 g/mol) = 26.04 g/mol
To find the number of grams in 0.50 mol of C2H2, you multiply the number of moles (0.50 mol) by the molar mass (26.04 g/mol):
0.50 mol * 26.04 g/mol = 13.02 grams
Therefore, 0.50 mol of C2H2 is equivalent to 13.02 grams.
4. Al(OH)3 (Aluminum hydroxide):
The molar mass of aluminum (Al) is approximately 26.98 g/mol, the molar mass of oxygen (O) is approximately 16.00 g/mol, and the molar mass of hydrogen (H) is approximately 1.01 g/mol. Since there is one Al atom, three O atoms, and three H atoms in Al(OH)3, the molar mass is:
(1 * 26.98 g/mol) + (3 * 16.00 g/mol) + (3 * 1.01 g/mol) = 78.00 g/mol
To find the number of grams in 0.50 mol of Al(OH)3, you multiply the number of moles (0.50 mol) by the molar mass (78.00 g/mol):
0.50 mol * 78.00 g/mol = 39.00 grams
Therefore, 0.50 mol of Al(OH)3 is equivalent to 39.00 grams.