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Use standard heat of formation data to calculate the heat released per gram of B2H6 when burned with O2(g) to afford boric acid (H2BO3(s)).
if the density of carbon dioxide in air is .65mg/L, what volume is occupied by 25kg of carbon dioxide?
what is the role of nh4cl in reduction of camphor with
Suppose you dope that 1-cm^3 sample of silicon with 1 ppm of phosphorus that will increase the conductivity by a factor of a million. How many milligrams of phosphorus are required
How many g of NaCl are required to prepare 250.0 mL of a 0.3440 M solution of NaCl in water?
A solution is prepared by adding 60.0 mL of 0.060 M HBr to 180.0 mL of 0.70 M HI. Calculate the concentrations of all species in this solution. HBr and HI are both considered strong acids
What is the pH when 50.0mL of a 0.53M solution of CH3NH2 is titrated with 17.70mL of a 0.37M soltion of perchloric acid?
determine the mass of lithium hydroxide produced when 0.38 g of lithium nitride reacts with water according to the
Polonium metal crystallizes in a lattice which contains only one Po atom per cubic unit cell. The radius of polonium atom is 1.67 A. Calculate the density of the polonium metal
When using M1 x V1 = M2 x V2 to calculate any concentration or volume, what must one remember with regards to glassware when recording / using volumes
Calculate the hydronium ion concentration and the pH after the addition of 0.25 mL of 0.10 M HCl to each one.
methane has a henrys law constant kof 9.88 times 10-2 mollmiddotatm when dissolved in benzene at 25degc. how many grams
a 2.545g sample contains carbon hydrogen and oxygen. it is subjected to carbon-hydrogen analysis and 3.703g of co2 and
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