Calculate the percent of oxygen in potassium chlorate. This is known as the theoretical yield. Include % and round to the nearest whole number.
Let me correct you. It is NOT known as theoretical yield. It is known as percent composition.
% O = (grams oxygen/grams KClO3)*100 = ?
The easy way to do this is to use atomic and molar masses; i.e., atomic mass O = 16 and 3*16 = 48. Molar mass KClO3 is 122.6 (you need to confirm that).
%O = [(3*16)/122.6]*100 = ?
Post your work if you have additional questions.
To calculate the percent of oxygen in potassium chlorate, we need to first determine the chemical formula of potassium chlorate. Potassium chlorate is composed of the elements potassium (K), chlorine (Cl), and oxygen (O).
The chemical formula for potassium chlorate is KClO3. From the formula, we can see that there is one oxygen atom present in each molecule of potassium chlorate.
To find the percent of oxygen in potassium chlorate, we need to calculate the molar mass of oxygen and the molar mass of potassium chlorate.
The molar mass of oxygen (O) is approximately 16.00 g/mol.
The molar mass of potassium chlorate (KClO3) can be calculated by adding up the atomic masses of its constituent elements:
Molar mass of K = 39.10 g/mol
Molar mass of Cl = 35.45 g/mol
Molar mass of O = 16.00 g/mol
Molar mass of KClO3 = (39.10 g/mol) + (35.45 g/mol) + (16.00 g/mol) = 90.55 g/mol
Now, we can calculate the percent of oxygen in potassium chlorate using the following formula:
Percent of oxygen = (mass of oxygen / molar mass of potassium chlorate) * 100
The molar mass of O is 16.00 g/mol, so the mass of oxygen is also 16.00 g.
Percent of oxygen = (16.00 g / 90.55 g/mol) * 100 ≈ 17.68%
Therefore, the percent of oxygen in potassium chlorate is approximately 17.68%, rounded to the nearest whole number.
To calculate the percent of oxygen in potassium chlorate, we need to use the chemical formula of potassium chlorate (KClO3) and determine the molar mass of oxygen (O) and potassium chlorate (KClO3).
The molar mass is the mass of one mole of a substance, and it is expressed in grams per mole (g/mol). Here are the molar masses of the elements involved:
Oxygen (O): 16.00 g/mol
Potassium (K): 39.10 g/mol
Chlorine (Cl): 35.45 g/mol
Now, let's find the molar mass of potassium chlorate (KClO3):
(1 x K) + (1 x Cl) + (3 x O)
= (1 x 39.10 g/mol) + (1 x 35.45 g/mol) + (3 x 16.00 g/mol)
= 39.10 g/mol + 35.45 g/mol + 48.00 g/mol
= 122.55 g/mol
Next, let's determine the molar mass of oxygen in potassium chlorate (KClO3):
(3 x O)
= (3 x 16.00 g/mol)
= 48.00 g/mol
To find the percent of oxygen in potassium chlorate, we can use the following formula:
Percent Oxygen = (Molar Mass of Oxygen / Molar Mass of Potassium Chlorate) x 100
Substituting the values we calculated:
Percent Oxygen = (48.00 g/mol / 122.55 g/mol) x 100
Calculating this expression:
Percent Oxygen ≈ 39.1%
Rounded to the nearest whole number, the percent of oxygen in potassium chlorate is approximately 39%.