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What volume of dry hudrogen would be produced understandard conditions when 0.250 g of magnesium reacts withexcess HCL?
As a technician in a large pharmaceutical research firm, you need to produce 350.mL of 1.00 M potassium phosphate buffer solution of pH = 6.87. The pKa of H2PO4- is 7.21.
Treating the atom as a cube, and assuming no empty space in the solid, estimate the length (in A) of an atom of B in alpha-rhombohedral boron using the data
Suppose that 180 g of ethanol at 26 ? C is mixed with 225 g of ethanol at 83 ? C at constant atmospheric pressure in a thermally insulated vessel.
If 30.0 grams of ammonium chloride react to form 9.6 grams of ammonia, how many grams of hydrogen chloride must simultaneously be formed
The temperature of 3.50 kg of water is raised by 1.17°C when 1.00 g of hydrazine N2H4 is burned in a bomb calorimeter. The bomb has a heat capacity of 883 J/°C. How much heat is given off by the sample
Deuterium oxide (D20, where D is deuterium, the hydrogen-2 isotope) has an ion-product constant, kw1 of 8.9 x 10^-16 at 20 degrees Celsius. Calculate [D+] and [OD-] for pure (neutral) D20 at this temperature.
Write a reaction mechanism for the chlorination of 1-butene by Cl2. Use curved arrows to show electron movement. Show structures of key reaction intermediates and products and indicate the stereochemistry of the reaction.
What is the age of a rock whose Argon 40 / Potassium 40 ratio is 1.55? The half life of Potassium 40 is 1.28 x 10^9 years.
Determining System Equilibrium, A one-litre cylinder at 458'C is found to contain 0.36 moles of HI (g), 0.15 moles of I 2(g), and 0.18 moles of H2(g). Is this system at equilibrium?
If a second experiment is done with half as much H2O2 as the experiment in question 1, and the solution turns blue in 180 seconds, what is the order of the reaction with respect to H2O2?
Balnace the following half reactions in an acidic solution a) MnO4 -(aq)---- MnO2(s) b) IO2- (aq)----Io4-(aq) based on (a) and (b) above, write balanced redox eqautions of (A) in an acidic solution MnO4-(aq) + IO3_(aq)----MnO2(s) + IO4- (aq) (A)
how many moles of carbon dioxide can be produced if one tablet containing 0.0119 mol sodium bicarbonate is dissolved
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