Which initial substance remained in excess
The reaction 2Al + 3MnO ----> Al2O3 + 3Mn proceeds till the limiting substance is consumed. A mixture of 220g Al and 400g MnO was heated to initiate the reaction. Which initial substance remained in excess and by how much?
Expected delivery within 24 Hoursrs
How many grams of Mg(OH)2 will be needed to neutralize 25 mL ofstomach acid if stomach acid is 0.10 M HCl ? How many mL of a 0.10 M NaOH solution are needed to neutralize15 mL of 0.20 M H3PO4 solution?
Could you do anything in this experiment to improve your yield? How do you account for the change in mass of the copper wire? Where does the mass go to or come from?
The solubilities of cholesterol in water and chloroform are0.250 mg/100mL and 1.00 g/4.5mL, respectively. Estimate thepartition coefficient of cholesterol between chloroform and water.
A mixture containing only iron (III) sulfide and iron (III) chloride is reacted with HCl. The iron sulfide reacts according to the balanced equation:
When a 0.6333-g sample of a compound of carbon, hydrogen and sulfur was burned in excess oxygen, 0.9272 g CO2, 0.3795 g H2O and 0.6749 g SO2 were obtained.
A student wants to react Mg(s) with 100mL of 1.5 M HCl, but theintent is to have all the Mg(s) react, while leaving 50% of the HCl unreacted. How much Mg (in g) should the student add to the HCl?
A mixture of He,Ar, Xe and has a total pressure of 2.60 atm. The partial pressure of He is 0.350 atm, and the partial pressure of Ar is 0.200 atm. What is the partial pressure of Xe?
The amount of lactic acid,HC3H5O3, produced in a sample of muscle tissue was analyzed by reaction with hydroxide ion.Hydroxide ion was produced in the sample mixture by electrolysis.The cathode reaction is given below.2 H2O(l) + 2 e ‾→
Lightning from thunderstorms strike the Earth 100 times each second. 2400 deaths have been caused by lightning strikes over the past 25 years. How many strikes occur before a death occurs? Please explain?
It has been replaced by quantummechanics but, by a remarkable coincidence (not the only one wherethe Coulomb potential is concerned), the energies it predicts agreeexactly with those obtained from the nucleus.
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!