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What mass of water could be heated by burning 1g of paraffin (wax) from 0 degrees celcious to 37 degrees celious when teh heat of combustion of paraffin is 10.0kcal per gram.
when a metal was exposed to light at a frequency of 4.63*10^15 Hz, electrons were emitted with a kinetic energy of 3.10*10^-19 J.
Cassify these compounds by whether they behave as strong acids, weak acids, strong bases, or weak bases in aqueous solution.
At 25 °C and 765 Torr, carbon dioxide has a solubility of 0.0342 M in water. What is its solubility at 25 °C and 1470 Torr
What is the buffer component ratio, ([BrO-]/[HBrO]) of a bromate buffer that has a pH of 7.88. Ka of HBrO is 2.3 x 10-9
Given the initial concentrations of 0.10 atm NO2 and 0.10 atm N2O4 in a 1.0 L flask, what will be the equilibrium partial pressure of NO2? N2O4(g) ? 2 NO2(g) Kp = 0.660 at 319 K
what mass is grams of potassium chloride is produced if 100. g of potassium chlorate decompose according to the following equation? 2KClO3>>> 2KCl+3O2
The normal boiling point for acetone is 56.5 C. At an elevation of 5300 ft the atmospheric pressure is 630 torr. What would be the boiling point of acetone Hvap = 32.0 kJ/mol at this elevation
The pH of a bicarbonate-carbonic acid buffer is 8.50. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
Assume that the partition coefficient, K, for partitioning of compound A between diethyl ether and water is 3; that is, A preferentially partitions into ether.
For such systems, it is often observed that the ratio of the vapor pressures of the pure species is nearly constant over a considerable temperature range. Let this ratio be r, and determine the range of values of A, expressed as a function of r, f..
1FeO3+2 Al= 1Al2O3+2Fe, Determine the percent yield of a reaction that produces 28.65g of Fe when 50.0g of Fe2O3 reacts with excess Al according to the following reaction. Be sure to balance the reaction.
The rest mass of a proton is 1.0072764669 u and that of a neutron is 1.0086649156 u. The 75As nucleus weighs 74.92160 u. Calculate the total binding energy of the nucleus.
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