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1.) The precipitate that you have formed is MgNH4PO4.6H2O.
a.) Calculate its formula weight (molecular weight).
b.) From this formula and the mass of the percolate you obtained, calculate the number of grams phosphorus, P in the plant food.
c.) From the number of grams of phosphorus, calculate the number of grams of P2O5 in the plant food.
d.) Calculate the %P2O5 in the plant food. How does your value compare with the value listed on the plant food label?
2.) Amber R Coyler, by mistake, started the experiment with 2.86 grams of another type of fertilizer- " Hyponex plant powder" that has an NPK label of 7-6-19. At the end of the experiment ,she obtained a precipitate with a mass of 0.165 g. Calculate the % P2O5. in the plant food. How does her value compare to the value shown on the label?
What is the pKa for the pyridium cation. Pyridine + H2O Pyridium cation + OH- Kb = 1.71 *10^-9 A. pKa for the pyridium cation = 3.9 B. pKa for the pyridium cation
The reaction A=B+ C is second order in A. when [A}0=0.100M, the reaction is 20% complete in 35 minutes. Calculate the value of the rate constant in ( L/min.mol)
A typical aspirin tablet contains 325 mg of acetylsalicylic acid ( HC9H7O4). Calculate the pH of a solution that is prepared by dissolving five aspirin tablet(s) in one cup (237 mL) of solution. Assume the aspirin tablets are pure acetylsalicylic ..
question if one starts with pure no2g at a pressure of 0.500 atm the total pressure inside the reaction vessel when
Problem- A sample of gallium(III) sulfite, Ga2(SO3)3, contains 1.95 mol of sulfite ions. The number of moles of gallium(III) ions in the sample is
How many grams of sulfur (S) are needed to react completely with 355g of mercury (Hg) to form HgS?
Complete and balance each of the following equations for acid-base reactions. Express your answer as a chemical equation. Identify all of the phases in your answer.
What mass of water would need to evaporate from your skin in order to dissipate 1.7 × 105 J of heat from your body? H2O(l) → H2O(g) ΔHvap = 40.7 kJ/mol
The equilibrium constant, Kp , for the reaction CO(g) + H2O(g)-> CO2(g) + H2(g) at 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor
Write a proposed procedure in chart format to determine the identity of the following aqueous solutions: HCl, Na2C2O4, Al(NO3)3, AgNO3, Mn(NO3)2, ZnCl2, H2O2, NH4Cl, Ba(NO3)2, Na2CO3, NA2S2O3.
magnesium carbonate was added to 25cm cubed of 2.0 moldm cubed of nitric acid. they react in the following reaction
Explain why two layers formed when 3 M NaOH was added to the ether solution after the initial separation. What solvents do the two layers represent? Which solvent forms the upper layer? Why?
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