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If 67.2 g of P4 is burned, 1620 kJ of energy is evolved. What is the molar enthalpy of combustion of P4 if the process was carried out under constant pressure? & ;
What is the volume percent of a solution prepared by dissolving 43 g of NaOH in enough water to make a final volume of 120 ml
A Mixture of 80mL of Hydrogen Gas and 60 mL of Oxygen gas is ignited by a spark to form water (please show work)a) does any gas remain unreacted?
If CO at constant pressure was burned with excess air and the measured temperature of exit gases was 981 degrees Celsius. What was the percent of excess air used? The reactant entered at 93 degrees
What is the boiling point of water at an elevation of 1.15×104 ? Express your answer with the appropriate units.
Analysis of the products revealed that 0.1356 g of water were produced. How many moles of H are present in the sample?
66 kg diver steps off a 13 m tower and drops from rest straight down into the water. If he comes to rest 4.8 m beneath the surface, determine the average resistance force exerted on him by the water
If 348 grams of K2SO4 (molar mass 174 grams) is dissolved in enough water to make 500 milliliters of solution, what are the concentrations of the potassium and sulfate ions?
The tabulated mass of Cl is 35.45 amu. The two dominant isotopes of naturally occurring Cl are 35Cl (34.97 amu) and 37Cl (36.97 amu). What are the relative abundances of 35Cl and 37Cl?
A 4.000-g sample of the metal nitrate M(NO3)2 was dissolved in water and treated with excess aqueous sodium sulfate. The sulfate salt that formed weighed 3.318 g. Determine the identity of the metal
A piece of metal of mass 27 g at 99?C is placed in a calorimeter containing 45.1 g of water at 21?C. The final temperature of the mixture is 38.7?C. What is the specific heat capacity of the metal?
What's the best way to learn organic chem I reactions? I have looked at many flash cards and my text, but they all look different when I try to find some similarity for memorization
What would be the major product expected from sequential treatment of propylbenzene with i) Cl2 and FeCl3, ii) KMnO4, iii) H3O+, and iv) Br2 and FeBr3?
Solutions of AgNO3 and KCl are combined and 0.683 g of a precipitate are formed. What is the precipitate and how many moles were formed?
A 52.0-g sample of an alloy at 93.0°C is placed into 379 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup. If the final temperature of the system
A 293 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction
According to the "7:10 Rule of Thumb," if the exposure rate one hour after detonation of a nuclear weapon is 500 R/hr, the exposure rate approximately 14 days later (343 hours) will be approximatel
If you place the box on a dolly of mass 4.7 and with coefficient of rolling friction 2.0×10-2, what horizontal acceleration would that 154 force provide?
The temperature of 55 g sample of a certain metal drops by 113 degreed C as it loses 837 cal of heat. What is the specific heat of the metals.
The same reaction is repeated with an initial partial pressure of 759 torr of {rm X}_{2} at 800 K; the equilibrium partial pressure of X is 518 torr.
A syringe for drawing blood commonly has an opening with a diameter of 0.514mm. If a force of 5.5. is applied to the syringe, what is the pressure of the liquid coming out of the needle.?
The loss of heat to the external environment is negligible. When equilibrium is established, the temperature is 30.0°C. What is the specific heat capacity of the specimen?
The acid required 27.4 mL of base to reach the equivalence point. (a) what is the molar mass of the acid? (b) after 15.0 mL of base had been added in the titration, the pH was found to be 6.50. What
A hammer is hanging by a light rope from the ceiling of a bus. The ceiling of the bus is parallel to the roadway. The bus is traveling in a straight line on a horizontal street. You observe that the
What is the molarity of a nitric acid solution if 43.53 mL 0.1000 M KOH solution is needed to neutralize 20.00 mL of the acid solution?