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The recommended daily dietary intake of calcium for adult men and pre-menopausal women is 1100 mg/day Calcium citrate , Ca3(C6H5O7)2. What mass of calcium citrate would be needed to provide the recom
At 500 K, PCl5 decomposes rather extensively into PCl3 and Cl2. If 1.000 moles of PCl5 is placed in a 1 liter box at 500 K, 13.9 % of it decomposes into PCl3 and Cl2
Calculate K for 2 NO(g) + O2(g) 2 NO2(g) from the observation that when equilibrium is established at 500 K, there are 0.190 moles NO2, 2.65 X 10-4 moles NO, and 0.606 moles O2 in a volume of 0.759
If an average cup of coffee contains approximately 100 of caffeine, how many moles of caffeine are in one cup
How many atoms of iron would be needed to react completely with 36 molecules of oxygen. How many molecules of oxygen would be needed to react completely 16 atoms of iron
The standard reduction potiental for the reduction of Eu+3 to Eu+2 is -.43 volts... list atleast 3 substances capable of reducing Eu+3 to Eu+2
How many copper atoms and how many zinc atoms are in the penny provided. You will have to do some research to help with this one
What is the pH of a solution prepared by diluting 25.00 mL of 0.10 M HCl with enough water to produce a total volume of 100.00 mL
The element antimony has an atomic weight of 121.757 amu and only two naturally occuring isotopes. one isotope has an abundance of 57.3 % and an isotopic mass of 120.904 amu based on these data what
A student dissolved 3.00 g of Co(NO3)2 in enough water to make 100. ml of stock solution. He took 4. ml of the solution then diluted it with water to give 275 ml of a final solution how many grams o
Adding a concentrated solution of NH4OH(aq) caused the precipitation of Cr+2 and Fe+3 as insoluble hydroxides. The Cu+2 remained in solution and forms the complex ion Cu(NH3)4+2. Which balanced mole
we will measure the rate of the following redox reaction: 6I + BrO3 +6H -> 3I2 +Br + 3H2O rate = 1/3 delta[I2]/delta t after 219 seconds When the reactants are mixed it is found that the molarity
What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 11.8 m/s when going down a slope for 3.61 s? (b) How far does the skier travel in this time
Torsional strain is exhibited during exclipsed Newman Projections. Where would steric hindrance be demonstrated? At any point in a Newman Projection
Given the following: 3648 L of wine, pH is 3.24, FSO2 is 24mg/L, TSO2 is 89 mg/L, alcohol is 12.6%. You want to maintain a MSO2 of at least 0.8 mg/L. How many mL of 95% pure SO2 liquid that has a de
To perform a FSO2 analysis using the AO method, you discover that you are out of 3% H2O2. There are 30 samples to test. Will 40 ml of 30% H2O2 be enough to get through all the FSO2 samples and why
Calculate the standard free-energy change at 25 ^ \circ \rm C for the following reaction using the table in the introduction
at 25c the standard enthalpy of formation of HF(aq) is -320.1 kj/mol. of OH(aq) it is -229.5Kj/mol. of F (aq) it is -329.5 Kj/mol.of H2O(l) it is -286.1Kj/mol.
A 28.0g sample of an unknown metal at 99.0c was placed in a constant pressure calorimeter containing 85.0g of water at 24.0c. the final temperature of the system was found to be 28.4c. calculate the
(a) What is teh rate law for the reaction. what is the value of the rate constant
Draw every stereoisomer for 1-bromo-2-chloro-1,2-difluorocyclopentane. Use wedge-and-dash bonds for the substituent groups, and be sure that they are drawn on the outside of the ring, adjacent to ea
Given that Kp for 2 SO2(g) + O2(g)-->/<-- 2 SO3(g) equals 3.18 at 1000 K. Figure out what must be the value of Kc for this same equilibrium.
You are given a box containing at equilibrium at 1000 K 0.102 moles/liter NH3, 1.03 moles/liter N2, and 1.63 moles/liter H2 for the reaction N2(g) +3 H2(g)-->/<--2NH3(g) calculate Kp. Please e
In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When equilibrium is established, it is found that the total pressure is 2.175 atm. Calculate K for the reaction.
You have a box of volume 1.00 liter into which you inject 2.65 g of NH3 at 600 K. What will be the final concentrations of NH3, N2, and H2 after equilibrium is established