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Use the wattage of the lightbulb and the time it is on to calculate in joules (assume that the cylinder and lightbulb assembly is the system and assume two significant figures).
we place an excess ( more than can dissolve) of PbCl2 into 100 ml. of water and find that at equilibrium [Cl]=0.032 M . Calculate kc for the following reaction : PbCl2 = Pb+2Cl
Calculate the concentrations of all species in a 1.01 M Na2SO3 (sodium sulfite) solution
What is the concentration of KOH for the final solution?
Find the equilibrium constant for the reaction- A(g) + B(g)--> 2C(g) at 25C when k equals 1.4 x 10^-12 M^-1S^-1 for the reaction A(g) + B(g)-->2C(g) at 25C and k equals 2.7 x 10^-13 M^-1S^-1 for the reaction: 2C(g)-->A(g) + B(g) at 25C.
A gas has an initial volume of 2.75 L at temperature of 285 K. If the temperature changes to 380 K, what is the new volume of the gas if the pressure is unchanged?
Propane gas (C3H8) is used as a fuel in rural areas. How many liters of C02are formed at STP by the complete combustion of the propane in a container with a volume of 15.0 L
milk is pasteurised when heated to 63 C for 30 minutes, but if it is heated to 74 C it takes only 15 seconds for the same result. Find the activation energy for this sterilisation process
The pH of the resulting solution is 6.35. Calculate the Ka for the acid.
The balloon is designed to continue its ascent to an altitude of 30 km, where it bursts, releasing a package of meteorological instruments that parachute back to Earth.
what is the molecular mass nonionic solutes of 8.02 grams of solute in 861 grams of water lower the freezing point to -0.430 c.
A patient needs 2.80×10-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
A 397 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 639 mmHg. Calculate the moles of Ar present
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