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Phosphorite is a mineral that is 25%other non-phosphorus materials and 75% calcium phosphate. Calculate the mass of P4(s) can be formed from 1.0Kg of phosphorite assuming an 80% yield of phosphorus fr
50.0 mL of rhubarb juice are titrated with 0.1000 M NaOH and 36.16mL of this NaOH solution are needed for neutralization. Calculate the weight of oxalic acid per liter of juice, assuming th
A gaseous sample which is having a mixture of only carbon monoxide and nitrogen occupies a volume of 3.05L at 22°C.
A buffer is prepared by mixing the 475mL of 0.50 M sodium formate and 525 mL of 0.50 M formic acid. Given the Ka= 1.7 X10-4. Determine the pH using both the equation for the ionization showing all t
If there are 3.00×10^10 atoms of zinc emitting light in the instrument flame at any given instant, explain what energy must the flame continuously supply to achieve this level of emission
There are different rules of concentration in the measurement of homeopathic medicine. The doctor has a solution A that contains the specific drug with a 1M concentration of a 50.0mL solution.
Calculate the volume of this gas sample when the absolute temperature is doubled and the pressure is tripled? An isolated quantity of an ideal gas at 306.1 K has a volume of 12.44 L at a pressure o
Determine the numbers of photons per second are formed by an infrared lamp that consumes energy at the rate of 100 W and is 12 % efficient in converting this energy to infrared the radiation? Assum
Calculate the mole ration of conjugate acid to conjugate base for a buffer, by using the Henderson-Hasselbalch equation.
Determine the pressure and the composition of air on the top of Mt. Everest, assuming that the atmosphere has a temperature of -20C independent of altitude (h=29141). Suppose when the air at sea le
A solution of Ba(OH)2 is known to be 0.1364 M. Calculate the molarity of hydroxide ion in this solution? Suppose when Ba(OH)2 is totally dissociated in the solution.
Determine the numbers of grams of H2SO4 (98.08 g/mol) can be totally neutralized by the 36.00 mL of 0.1500 M sodium hydroxide?
Determine the change in the entropy of the system and the surroundings when one mole of an ideal monatomic gas doubles its volume in
Explain how much water should be added to 1000 mL of a 0.1539 M solution of Ba(OH)2 to make it exactly 0.1000 M?
Determine the numbers of milliliters of 0.1200 M HCl are needed to totally neutralize 25.00 mL of 0.1000 M Ba(OH)2?
Determine the numbers of grams of Ba(OH)2 (171.36g/mol) are present in the solution? When a solution contains 2.140 mmol of base (hydroxide) from Ba(OH)2.
Determine the concentration of this acetate buffer ?Explain how much water must be added to obtain a concentration = 0.04M?
If 33.55 mL were needed to reach a phenolphthalein endpoint with a 0.5589gram sample of primary standard potassium hydrogen phthalate (204.23 g/mol) then calculate the molarity of a Ba(OH)2 sol
Determine the numbers of grams of sulphuric acid that can be neutralized by the 22.00 ml of 0.2200 M sodium hydroxide solution?
Determine the numbers of grams of sodium hydroxide does the solution contain when a certain solution contains the 2.240 mmol of sodium hydroxide.
Calculate the concentration of the acetic acid when a volume of 18.95mL of .5025M NaOH solution was required to titrate 1.00ml of acetic acid to the phenolphthalein end point.
Calculate the total concentration of ALL ions present in the solution, when 0.102moles of (NH4)3PO4 is dissolved in the enough water to make 0.500L of solution.
At 25 degrees C a certain first-order reaction has a rate constant of 1*10^-31/s If the reaction rate doubles when the temperature is increased to 35 degrees C, calculate the activation ene
When the ammonium fluoride and calcium nitrate react to form the calcium fluoride, dinitrogen monoxides, and the water vapor, discuss what mass of dinitrogen monoxide is present after 17.50g ammoni
Calculate the percent yield for the reaction PCl3(g) +Cl2(g) PCl5(g) if 119.3g of PCl5 are produced when 61.3g of Cl2 react with excess