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60cm3 of oxygen gas diffuse through a porous pot in 10 seconds and 100cm3 of chlorine diffuse through the same pot in 25 seconds. If the density of Oxygen is 16 times that of hydrogen, what is the density of chlorine compared to hydrogen.
a zero-order reaction has a constant rate of 2.50times10-4 ms . if after 60.0 seconds the concentration has dropped to
Even if the volume of the water could be measured very accurately, there would still be uncertainly in the mass of the water. what is source of error have we not take account?
At 22 degrees celsius the vapor pressure of pure acetone, C3H6O is 189.2 torr and of pure diethyl ether C4H10O is 451.8 torr. calculate the mole fraction of acetone
The carbonyl peak of benzaldehyde appears as a very strong and intense peak at 1703 cm -1. Normally the carbonyl peak of an aldehyde appears at 1725 cm -1. Why does the carbonyl peak of benzaldehyde appear at a lower frequency
The atmospheric activity of 14 C is 15 cpm/gC (counts per minute per gram of carbon). Assume that the cloth was made in the year 24 B.C. The half-life of 14 C is 5730 years. What will be the expected activity of 14 C of this sample
A chemist dissolves 128 mg of pure hydrobromic acid in enough water to make up of 110 mL solution. Calculate the pH of the solution.
Calculate w (in kJ) when 566 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 332 K: 2Fe2O3(s) + 3C(s) ? 4Fe(s) + 3CO2(g)
Why is it difficult to construct a Lewis Dot structure for the molecule NO? What kind of molecule is this
Which equation represents a reaction that provides the heat of formation of CHCl3 (l)? a) C (s) + H (g) + Cl3 (g) à CHCl3 (l) b) 2 C (s) + 3Cl2 (g) + 2H(g) à 2 CHCl3 (l)
For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species. For the reaction 2N(g) + 3H2(g) 2NH3(g)
When 23.2 mL of 0.11 M HCl are added to 50.0 mL of a 0.17 M solution of a weak monoprotic base, the pH of the solution is 9.70. What is the Kb of the weak base
A sample of oxygen is collected by water displacement at a temperature of 35C when the barometric pressure is 752 mm Hg. What is the partial pressure of the dry gas?
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