Question 14 of 38 > A 5.29 g mixture contains both lithium fluoride; LiF, and potassium fluoride, KF. If the mix...
Question 14 of 38 > Attempt 1 A 5.29 g mixture contains both lithium fluoride, LiF, and potassium fluoride, KF. If the mixture contains 3.47 g fluorine, what is the mass of the KF in the mixture? mass of KF: 1.82
A 5.51 g mixture contains both lithium fluoride, LiF, and potassium fluoride, KF. If the mixture contains 3.56 g fluorine, what is the mass of the KF in the mixture? Ø mass of KF: 1.08 g
A 5.33 g mixture contains both lithium fluoride, LiF and potassium fluoride, KF. If the mixture contains 3.45 g fluorine, what is the mass of the KFKF in the mixture?
Question 27 5 pts How many grams of lithium fluoride, LiF (MW = 25.94 g/mol), are required for a 65.0 mL of a 0.725 MHF solution to make a buffer at a pH = 3.85? (Ka = 7.2 x 10-4) O 6.23 O 0.380 O 0.247 O 0.329 0 0.0562
Attempt 1 Question 14 of 15 > A 0.690 g mixture containing only sodium chloride and potassium chloride was dissolved in water. It required 34.8 mL of 0.317 M AgNO, to completely precipitate all of the chloride present. What is percent composition by mass of sodium chloride and potassium chloride in the mixture? mass percent NaCl : 64.2 mass percent KCI : 35.9
Question 21 of 38 > A multi-nutrient fertilizer contains several different nitrogen containing compounds. The fertilizer is 51.9%CH N, (urea). 33.9% KNO,, and 10.4% (NH), HPO, by mass. The remainder of the fertilizer consists of substances that do not contain nitrogen. How much fertilizer should someone apply to provide 2.60 g N to a plant? mass of fertilizer:
Question 31 of 38 Question 31 of 38 > An aqueous solution containing 6.45 g of lead(II) nitrate is added to an aqueous solution containing 5.33 g of potassium chloride Enter the balanced chemical equation for this reaction. Be sure to include all physical states. balanced chemical equation: What is the limiting reactant? O lead(II) nitrate O potassium chloride The percent yield for the reaction is 91.4%. How many grams of precipitate is recovered? precipitate recovered: The percent yield for...
QUESTION 1 0.5 points Save Answer An energy diagram for the formation of crystalline potassium fluoride is shown below: A kig) +E+F(g) Kig)+F) Kig)+F) K(g) +1/25212 K()+1/2FTI KF) and the electron affinity of fluorine is labeled by the number In this diagram, the sublimation energy of potassium is labeled by the number {Enter as a whole number.) QUESTION 2 0.5 points Save Answer What volume (in Llis accupied by 2.39 moles of gas at -22.4 °C with a pressure of...
Question 22 of 38 > A 12.36 g sample of a compound contains 7.89 g of iron, Fe, 1.46 g of phosphorus, P, and oxygen, O. Calculate the empirical formula for the compound. empirical formula:
< Question 4 of 23 > A gaseous mixture contains 0.570 bar H, (g), 0.485 bar N, (g), and 0.105 bar Ar(g). Calculate the mole fraction, X, of each of these gases. XH, = XA = |