Calculate the molecular mass of the following a) H2SO4 b) Na2SO3 c) Fe(SO4)3 d) Cs(CO3) e) (NH3)4PO4 f) Mg(HCO3)2
a) H2SO4:
Molecular mass = (2*1.008) + (32.06) + (4*16.00) = 98.08 g/mol
b) Na2SO3:
Molecular mass = (2*22.99) + (32.06) + (3*16.00) = 126.04 g/mol
c) Fe(SO4)3:
Molecular mass = (1*55.85) + (3*(32.06)) + (12*(16.00)) = 399.88 g/mol
d) Cs(CO3):
Molecular mass = (1*132.91) + (1*(12.01)) + (3*(16.00)) = 168.01 g/mol
e) (NH3)4PO4:
Molecular mass = (4*(1.008)) + (1*(14.01)) + (1*(30.97)) + (4*(16.00)) + (3*(16.00)) = 149.04 g/mol
f) Mg(HCO3)2:
Molecular mass = (1*(24.31)) + (2*(1.01)) + (2*(12.01)) + (6*(16.00)) + (4*(16.00)) = 146.40 g/mol
Sure! I'd be happy to help you calculate the molecular mass of the given compounds step-by-step.
a) H2SO4:
- For H2SO4, we have 2 hydrogen atoms (2 H), 1 sulfur atom (1 S), and 4 oxygen atoms (4 O).
- The atomic masses are as follows: H = 1 g/mol, S = 32 g/mol, and O = 16 g/mol.
- To calculate the molecular mass, we sum up the atomic masses of all the atoms in the compound:
2(1g/mol) + 1(32g/mol) + 4(16g/mol) = 2 + 32 + 64 = 98 g/mol.
b) Na2SO3:
- For Na2SO3, we have 2 sodium atoms (2 Na), 1 sulfur atom (1 S), and 3 oxygen atoms (3 O).
- The atomic masses are as follows: Na = 23 g/mol, S = 32 g/mol, and O = 16 g/mol.
- To calculate the molecular mass, we sum up the atomic masses of all the atoms in the compound:
2(23g/mol) + 1(32g/mol) + 3(16g/mol) = 46 + 32 + 48 = 126 g/mol.
c) Fe(SO4)3:
- For Fe(SO4)3, we have 1 iron atom (1 Fe), 3 sulfur atoms (3 S), and 12 oxygen atoms (12 O).
- The atomic masses are as follows: Fe = 56 g/mol, S = 32 g/mol, and O = 16 g/mol.
- To calculate the molecular mass, we sum up the atomic masses of all the atoms in the compound:
1(56g/mol) + 3(32g/mol) + 12(16g/mol) = 56 + 96 + 192 = 344 g/mol.
d) Cs(CO3):
- For Cs(CO3), we have 1 cesium atom (1 Cs), 1 carbon atom (1 C), and 3 oxygen atoms (3 O).
- The atomic masses are as follows: Cs = 132.9 g/mol, C = 12 g/mol, and O = 16 g/mol.
- To calculate the molecular mass, we sum up the atomic masses of all the atoms in the compound:
1(132.9g/mol) + 1(12g/mol) + 3(16g/mol) = 132.9 + 12 + 48 = 192.9 g/mol.
e) (NH3)4PO4:
- For (NH3)4PO4, we have 4 ammonia molecules, each consisting of 1 nitrogen atom (1 N) and 3 hydrogen atoms (3 H), and 1 phosphate ion, consisting of 1 phosphorus atom (1 P) and 4 oxygen atoms (4 O).
- The atomic masses are as follows: N = 14 g/mol, H = 1 g/mol, P = 31 g/mol, and O = 16 g/mol.
- To calculate the molecular mass, we sum up the atomic masses of all the atoms in the compound:
4(1g/mol) + 4(14g/mol) + 1(31g/mol) + 4(16g/mol) = 4 + 56 + 31 + 64 = 155 g/mol.
f) Mg(HCO3)2:
- For Mg(HCO3)2, we have 1 magnesium atom (1 Mg), 2 bicarbonate ions, each consisting of 2 carbon atoms (2 C), 2 hydrogen atoms (2 H), and 4 oxygen atoms (4 O).
- The atomic masses are as follows: Mg = 24.3 g/mol, C = 12 g/mol, H = 1 g/mol, and O = 16 g/mol.
- To calculate the molecular mass, we sum up the atomic masses of all the atoms in the compound:
1(24.3g/mol) + 2(2(12g/mol) + 2(1g/mol) + 4(16g/mol)) = 24.3 + 2(24 + 2 + 64) = 24.3 + 2(114) = 24.3 + 228 = 252.3 g/mol.
I hope this helps! Let me know if you have any other questions.
To calculate the molecular mass of a compound, you need to know the atomic masses of each element in the compound. The atomic masses of elements can be found on the periodic table. The molecular mass is the sum of the atomic masses of all the atoms in the compound.
a) H2SO4:
- The atomic mass of hydrogen (H) is approximately 1.
- The atomic mass of sulfur (S) is approximately 32.
- The atomic mass of oxygen (O) is approximately 16.
So, the molecular mass of H2SO4 is:
(2 * 1) + 32 + (4 * 16) = 98 grams per mole (g/mol).
b) Na2SO3:
- The atomic mass of sodium (Na) is approximately 23.
- The atomic mass of sulfur (S) is approximately 32.
- The atomic mass of oxygen (O) is approximately 16.
So, the molecular mass of Na2SO3 is:
(2 * 23) + 32 + (3 * 16) = 126 g/mol.
c) Fe(SO4)3:
- The atomic mass of iron (Fe) is approximately 56.
- The atomic mass of sulfur (S) is approximately 32.
- The atomic mass of oxygen (O) is approximately 16.
So, the molecular mass of Fe(SO4)3 is:
56 + (3 * (32 + (4 * 16))) = 342 g/mol.
d) Cs(CO3):
- The atomic mass of cesium (Cs) is approximately 133.
- The atomic mass of carbon (C) is approximately 12.
- The atomic mass of oxygen (O) is approximately 16.
So, the molecular mass of Cs(CO3) is:
133 + 12 + (3 * (16 + (3 * 16))) = 166 g/mol.
e) (NH3)4PO4:
- The atomic mass of nitrogen (N) is approximately 14.
- The atomic mass of hydrogen (H) is approximately 1.
- The atomic mass of phosphorus (P) is approximately 31.
- The atomic mass of oxygen (O) is approximately 16.
So, the molecular mass of (NH3)4PO4 is:
(4 * (14 + (3 * 1))) + 31 + (4 * 16) = 132 g/mol.
f) Mg(HCO3)2:
- The atomic mass of magnesium (Mg) is approximately 24.
- The atomic mass of hydrogen (H) is approximately 1.
- The atomic mass of carbon (C) is approximately 12.
- The atomic mass of oxygen (O) is approximately 16.
So, the molecular mass of Mg(HCO3)2 is:
24 + (2 * (1 + 12 + (3 * 16))) = 146 g/mol.
Remember, to calculate the molecular mass of a compound, you need to sum the atomic masses of all the atoms present in the compound.