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Explain what volume of air at NTP containing 21% of oxygen by volume is required to completely burn 1000g of sulphur containing 4% incomburstible matter?
It takes 47.0 J to raise the temperature of an 9.00 g piece of unknown metal from 13.0rm ^circ C to 25.0^circ{C}. What is the specific heat for the metal?
Pressure was exerted with a piston on molten naphthalene at 95 degrees Centigrade. The vapor pressure of naphthalene under 1.0 bar is 2.0 kPa and its density is 0.962 g cm-3. What is its vapor pressure when the pressure on the liquid is 15 MPa?
You have a 48.9 g sample of water at the temperature of -60.0 degrees celcius. How much energy is required to: a) heat the ice to 0 degrees celcius
what is the approximate value of the equilibrium constant Kn for the neutralization of nitrous acid with ammonia shown in the equation below?
Magnesium oxide (MgO) forms when the metal burns in air. (a) If 1.25 g of MgO contains 0.754 g of Mg, what is the mass ratio of magnesium to oxide
what is the theoretical mass of xenon tetrafluoride that should form when 130 g of xenon is reacted with 100 g of f2?
(i) calculate the random match probability, RMP, for Katie (ii) based on the profile given and the attached inheritance.
A stock solution is prepared by adding 21 mL of 1 M AlCl3 to enough water to make 76 mL. What is the Cl- concentration of 40 mL of the stock solution?
What is the total combined mass of carbon dioxide and water that is produced when an automobile gasoline tank holds 20 of gasoline. When the gasoline burns, 85 of oxygen is consumed and carbon dioxide and water are produced?
how many atoms are there in 5.10 moles of sulfur s? how many moles of calcium ca atoms are there in 77.4 g of ca? what
Determine the pH of a 0.227 M C5H5N solution at 25°C. The Kb of C5H5N is 1.7 x 10-9.
If a solution is made from 100 g of pentane and 100 g of hexane, what will be the mole fraction of pentane in the gas phase over that solution (if only hexane and pentane vapor are present)? Assume no deviation from Raoult's law
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