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Calculate the pH of 0.300 L of a 0.500 M NaHSO3 / 0.300 M Na2SO3 buffer before and after the addition of the following solutions. Assume that the volume remains constant.
1. before addition pH
2. adding 5.0mL of 2.0M HCl
3. After adding 5.0mL of .1M NaOH
how much energy is liberated when 366 g of mercury c0.139jg degrees celsiuscools from 77.0 to 12.0 degrees
Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17%, and Rb-87 with mass 86.9092 amu and a natural abundance of 27.83%.
certain metals can be extracted from their salts usually halides those containing group 17 elements such as chlorine
The purification of hydrogen gas is possible by diffusion through a thin palladium sheet. Calculate the number of kilograms of hydrogen that pass per hour (in kg/h) through a 4.7 mm thick sheet of palladium having an area of 0.25 m2 at 500°C.
Choose the answer which presents the chemical formulas for two substances in order of decreasing melting point (highest melting point first) and gives a valid reason for this order.
Calculate the mass in metric tons of a cube of Au that is 36.1cm on each side? It is given that density of gold- 19.3 g.cm 3 , (1 metric ton-100kg)
The wastewater solution from a factory containing high levels of salts needs to be diluted before it can be released into the environment. Therefore, two containers of waste solution are separated by a semipermeable membrane and pressure is applie..
Provide an expression for the relative probability of finding a population of particles in the box in the second excited state relative to the ground state at 10000K
If the synthesis of 1.0 mol of ATP requires a ?G of 37.7 kJ, how many moles of ATP are synthesized per mole of oxygen consumed
Container A (with porous walls) is filled with air at STP. It is then inserted into a large enclosed container (B) which is then flushed with H2(g). What will happen to the pressure inside container A?
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 14.0 L of H2 gas if the pressure of H2 is 757 torr at 20.0°C
The combustion of octane produces carbon dioxide and water. If you start with 10.0 mol of octane, what mass of water (in grams) would you expect to produce?
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