Calculate the formula mass of each of the following compounds:
A)H2O3
B)AI2I6
C)C10H22
D)C6H8O6
E)K2CR2O7
F)C56H88O2
H2O3 = 1 for H on periodic table.
16 for O on periodic table.
molar mass = (2*1)+(3*16) = 2 + 48 = 50
To calculate the formula mass of a compound, you need to determine the molar mass of each element present and then add them together according to the formula.
A) H2O3:
The molar mass of hydrogen (H) is approximately 1 g/mol, and the molar mass of oxygen (O) is approximately 16 g/mol. Since there are two hydrogen atoms and three oxygen atoms in the formula, you can multiply the molar masses by their respective coefficient and add them together:
Molar mass of H2O3 = 2 * 1 g/mol + 3 * 16 g/mol = 34 g/mol
B) AI2I6:
The molar mass of aluminum (Al) is approximately 27 g/mol, and the molar mass of iodine (I) is approximately 127 g/mol. Similar to the previous example, you multiply the molar mass of each element by its coefficient and then add them together:
Molar mass of AI2I6 = 2 * 27 g/mol + 6 * 127 g/mol = 812 g/mol
C) C10H22:
The molar mass of carbon (C) is approximately 12 g/mol, and the molar mass of hydrogen (H) is approximately 1 g/mol.
Molar mass of C10H22 = 10 * 12 g/mol + 22 * 1 g/mol = 170 g/mol
D) C6H8O6:
Using the molar masses of carbon (C), hydrogen (H), and oxygen (O) as mentioned above:
Molar mass of C6H8O6 = 6 * 12 g/mol + 8 * 1 g/mol + 6 * 16 g/mol = 176 g/mol
E) K2Cr2O7:
The molar mass of potassium (K) is approximately 39 g/mol, chromium (Cr) is approximately 52 g/mol, and oxygen (O) is approximately 16 g/mol.
Molar mass of K2Cr2O7 = 2 * 39 g/mol + 2 * 52 g/mol + 7 * 16 g/mol = 294 g/mol
F) C56H88O2:
Using the molar masses of carbon (C), hydrogen (H), and oxygen (O) as mentioned earlier:
Molar mass of C56H88O2 = 56 * 12 g/mol + 88 * 1 g/mol + 2 * 16 g/mol = 872 g/mol
Please note that the above values are approximate and can vary slightly based on the periodic table and the specific isotopic composition of the elements.