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Choose the correct statement. A) Colloids are homogeneous solutions. B) A true colloidal particle will not settle out of the dispersing medium. C) Colloidal particles can usually pass through a semipermeable membrane. D) Electrolytes are protective colloids. E) Dispersion is the method of preparing colloids from ions or molecules.
In a certain decomposition reaction, dinitrogen pentoxide decomposes to form nitrogen dioxide gas and oxygen gas. It was found that at 187 seconds the concentration of oxygen gas was 0.374 mol/L and at 549.5 seconds the concentration of oxygen gas..
if a liquid has a density or 1.17 g/cm(3) and a mass of 3750 g calculate the volume?
A buffer that has .370 m base and .234 m of its conjugate acid contain ph of 9.09. what is the ph after .002 mol of HCL is added to .250 l of this solution.
moist air exerts lower pressure and dry air exerts high pressure. how would the volume of the hydrogen gas that was ollectes been different if this eperiment was done on a very rainy day/ on a very dry day?
5000 joules of energy are added to 108 grams of silver ag at 20degc. what is the final temperature of the metal? the
When an aqueous solution of sodium sulfite is added to an aqueous solution of hydrobromic acid, a gas evolves. Write the balanced chemical equation
determine the volume occupied by .582 moles of a gas at 15*C if the pressure is 622 mm Hg?
1.write a balanced equation for the reaction of copper with concentrated nitric acid to form copperii nitrate. assume
Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR: ? 1.30 (3H, t J = 7 Hz); ? 1.80 (3H, d, J = 7 Hz); ? 4.23 (2H, q, J = 7 Hz); ? 4.37 (1H, q, ..
Determine the quantity of unknown protein that has an absorbance of 0.227 when a blank has an absorbance of 0.081. The previously determined calibration curve has the form of a straight line with the equation A = 0.0182 × m 0.007
Carbon-14 has a half-life of 5730 yrs. A living organism has an activity of 15.2 counts per minute (cpm) per gram of carbon. If a bone is determined to have an activity of 3.80 cpm per gram of carbon, how old is the bone
Find the mass of 2 moles of phosphorus trichloride.
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