How many moles of potassium chloride are there in 50 grams?
For this you need the atomic (molecular) mass of KCl. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel. KCl= 74.6 grams
50.0 grams KCl / (74.6 grams) = .670 moles KCl
How many grams of potassium chloride are produced if 25 grams of potassium chlorate decompose into potassium chloride and oxygen?
He formula for potassium dichromate is KËÃCrËÃOËÈ How many grams of oxygen will be in 2 moles of potassium dichromate?
The formula for potassium dichromate is K2Cr2O7 How many grams of oxygen will be in 2 moles of potassium dichromate?
7: Molecules of HCl and KCl have the same number, 1, or chlorine atoms per mole; therefore, if HCl reacts completely with potassium, the same number of moles of potassium chloride as the number of moles of hydrogen chloride present will be formed. (For an ionic compound such as KCl, the term "formula unit" is preferable to "mole", but the mathematical consequences are the same.)
The atomic mass of Potassium is 39 and that of Sulfur 32. The formula for Potassium Sulfide is K2S therefore the molecular weight of Potassium Sulfide is (39 * 2) + 32 = 110. Therefore one mole of Potassium Sulfide weighs 110 grams. Therefore 3.3 moles of Potassium Sulfide weigh 110 * 3.3 = 363 grams.
Answer To find this answer, you need to know the molar mass of the compound. Find the weights of the elements involved, and add them up. Lithium chloride = LiCl Lithium = 6.94 grams Chlorine = 35.5 grams Lithium chloride = 42.2 grams Then follow the conversion process: Grams Ã· Molar mass = Moles 55.0 grams Ã· 42.4 grams = 1.30 moles LiCl See links below.
Molarity = moles of solute/Liters of solution ( 100 mL = 0.1 Liters) Moles of solute (K2SO4) = Liters of solution * Molarity Moles K2SO4 = 0.1 Liters * 0.1 M = 0.01 moles K2SO4 (174.27 grams/1 mole K2SO4) = 1.7 grams potassium sulfate =======================Add that many grams potassium sulfate to your 100 mL.