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A fossil was analyzed and determined to have a carbon-14 level that is 22.0% that of living organisms. How old is the fossil?
the first-order rate constant for the decomposition of n2o52n2o5g ---gt4no2g o2gat 70c is 6.82 10 - 3s - 1. suppose
A curved surface of a liquid which has its vapor pressure at equilibrium with the surroundings has a higher vapor pressure than a flat surface. Why
Estimate the temperature you should dope at (°C) if you must have a concentration of 100 P atoms per 10 million Si atoms at a depth of 10 nm in 5 minutes.
A sample consisting of 1.25 g of solid magnesium carbonate was heated to 670°C, where it decomposed. If the heating is carried out in a container fitted with a piston that was initially resting on the solid, calculate the work done by the piston o..
consider the gaseous reaction at 347 celsius N2+3H2-->2NH3 if 2.00 mole of N2 and 3.00 mole of H2 react, which of the two reactants is the limiting reagent.
Draw the major and minor products generated in the reaction of 1-Bromo-3methylene-cyclopentane in methyl alcohol and heat.
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 4.00 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C? Use CP = 30.8 ..
Which of the following is always true for a spontaneous process at constant temperature? A) Delta S system + Delta S surroundings = q/T B) Delta
Propane (C3H8) is burned in oxygen to produce carbon dioxide and water. The heat of combustion of propane is -2012 kJ/mole. How much heat is given off when 3.0 mol C3H8 are reacted with 10.0 mol O2
Assuming that you start with 2.00 g of sodium benzoate and 5 mL of 3M HCl, how many molar equivalents of HCl are you using? Use two decimal places.
At 100oC, the equilibrium constant (Kc) for the reaction COCl2(g) = CO(g) + Cl2(g) has a value of 2.19 x 10-10. Is the following mixture at equilibrium?
the value of delta h for the reaction h2 g plus br2 g yields 2hbr g is -72 kj. how many kj of heat are releasedwhen 1.0
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