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Would you expect the packing efficiency of atoms in a crystalline solid be greater or less than that in the liquid form of the same element..Explain?
when al metal reacts with hbr aluminum bromide and hydrogen gas are formed. if you started with 3.75 g of aluminum and
Draw a bromide that would undergo dehydrobromination (elimination of HBr) under basic conditions to give the compound whose name is below.
if 82.7874 grams of oxygen was given off during the decomposition, how many grams of KCIO3 were used?
A student placed 18.0 grmsof glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 gm. mark on the neck of the flask.
A 0.75-L bottle is cleaned, dried, and closed in a room where the air is 24°C and 50.% relative humidity (that is, the water vapor in the air is 0.5 of the equilibrium vapor
Hydrogen gas was cooled from 150C to 50 C. It's new volume is75 mL. What was it's original volume?
In a lab experiment demonstrating Beer's law, the absorbance of a 0.15 M sample of solution A was 0.750 at the wavelength of maximum absorbance. What is the molar absorptivity (extinction coefficient) if the path length is 1 cm
With this reaction 4FeS2+11O---> 2FeO3 +8SO2 A) how many molecules of SO2 are contained in 0.526 of this component? B) if 1.42 g of FeS2 reacts , how many SO2 grams are formed
Draw the organic product(s) of the reaction of p-methylbenzoic acid with aqueous sodium hydroxide
PCBs are transported through the environment in the vapor phase to Lake Superior. Let's assume that the flux to this lake is almost all due to rainfall, which has an average PCB concentration of 30 ng/L. The average depth of Lake Superior is 150 m..
You are given solutions of HCl and NaOH and must determine their concentrations. You use 26.6 mL of NaOH to titrate 100. mL of HCl and 21.4 mL of NaOH to titrate 50.0 mL of 0.0796 M H2SO4. Find the unknown concentrations. NaOH
Compound on TLC can be roughly distinguished into their classes based on the characteristics produced after they are modified by spraying reagent such as iodine vapour. What group of compound can be identified using iodine
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