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calculate teh PH of 2.0m NaCN. what is the concentration of HCN in the solution?
How many millilitres of 0.200 M HCl must be added to 50.0 mL of a 0.200 M solution of NH3 in order to prepare a buffer that has a pH of 8.60? Kb of NH3 = 1.8 x 10-5.
Determine how many kgs of methane (CH 4 ) are in completely insulated piston with the given properties: Pressure = 3 bar absolute. Volume = 2 cubic meters.
Which of the following pairs has about the same atomic radius?
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.150 M HClO(aq) with 0.150 M KOH(aq). The ionization constant for HClO is 4.0*10^-8
Explain Cyclopentadiene reacts as a diene in the the Diels-Alder reaction a great deal faster than does 1,3 butadiene.
There is a relatively constant amount of carbon-14 in living (breathing) things on Earth. Upon death of the plant or animal ,the amount of C14 in the organism decreases, according to the kinetics of first-order decay, A?products.Carbon dating is a..
An unknown organic compound has the empirical formula C2H2O. A solution of 3.775 g of the unknown compound dissolved in 12.00 g of water is cooled until it freezes at a temperature of 4.72°C.
A 4.78g sample of aluminum completely reacts with oxygen to form 6.67g of aluminum oxide. What is the mass percent composition of aluminum in aluminum oxide?
How many OH- ions appear in the correctly balanced equation, and on which side of the arrow?
An electron traveling at 3.7 X 10^5 m/sec has an uncertainty in its velocity of 1.88 X 10^5 m/s. What is the uncertainty in its position?
How many calories are required to heat 25.0 g of platinum (specific heat capacity = 0.032 cal/g.K) from 24.5 oC to 75.0 oC?
What is the value of Keq for the reaction 4 HCl(g) + O2(g) reverse reaction arrow 2 Cl2(g) + 2 H2O(g)?
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