determine the gram formula (mass of one mole) KMnO4
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Use a periodic table to calculate it.
RAM K = 39.1
RAM Mn = 54.9
RAM O = 16.0
RAM K=39.1
To determine the gram formula (mass of one mole) of KMnO4, we need to find the molar mass of this compound.
Here's how you can calculate the molar mass of KMnO4 step by step:
1. Write down the chemical formula of KMnO4, which consists of one potassium (K) atom, one manganese (Mn) atom, and four oxygen (O) atoms.
2. Look up the atomic masses of each element from the periodic table. The atomic mass of potassium (K) is approximately 39.10 grams/mol, manganese (Mn) is approximately 54.94 grams/mol, and oxygen (O) is approximately 16.00 grams/mol.
3. Multiply the atomic mass of each element by the number of atoms present in the formula. In this case, you have one K, one Mn, and four O atoms.
Mass of K = 39.10 g/mol × 1 = 39.10 g/mol
Mass of Mn = 54.94 g/mol × 1 = 54.94 g/mol
Mass of O = 16.00 g/mol × 4 = 64.00 g/mol (Since there are four oxygen atoms)
4. Add up the individual masses of each element to get the molar mass of KMnO4.
Molar mass of KMnO4 = Mass of K + Mass of Mn + Mass of O
= 39.10 g/mol + 54.94 g/mol + 64.00 g/mol
= 157.04 g/mol
Therefore, the gram formula (mass of one mole) of KMnO4 is approximately 157.04 grams.