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Why do flares contain magnesium powder rather than a solid piece of magnesium?
-Smaller particles have a lower energy of activation than larger particles.
-Converting Mg to a powder makes it a molecular compound which reacts more rapidly.
-Larger particles react faster than small particles.
-Converting Mg to a powder makes it a catalyst.
-The larger surface area of the powder increases the rate of reaction.
Calculate the pH of a sodium cyanide solution that is 0.37M NaCN. The Ka for hydrocyanic acid HCN is 4.00E-10.
Ethanol is a common laboratory solvent and has a density of 0.789 g/mL. What is the mass, in grams, of 143 mL of ethanol.
Write complete and balanced net ionic equations for the reaction that occurs between the following pairs of reagents. If no reaction occurs, so state.
Determine all concentrations after 15 minutes. What is the chlorine concentration. What is Q after 15 minutes?
If we could take IR spectra on decanedioyl chloride and the product that you made, which of these two molecules would you expect to show higher C=O stretching frequency. Why
It phosphoresces at 500 nm. If the ratio of the transition probabilities for stimulated emission for the S* --> S to the T --> S transitions is 1.0 x 10^5, what is the half-life of the phosphorescent state
In a solution of pure water, autoionization occurs producing conjugate acid-base pairs in solution.
Hydrogen gas, H2(g), reacts with iodine gas, I2(g), to form HI(g) by the following proposed reaction mechanism with the listed hypothetical activation energies
Determine the mass, of: a.30.0 mL of the liquid propylene glycol, a moisturizing agent for foods,
When making an alcoholic beverage, such as beer and wine, Brix is a measurement used to assess the amount of sugar present in the fermentation matrix or grape juice.
your patient suffers from medium chain acyl CoA MCAD) deficiency. compared to a normal person, you would expect all of the following except
Consider a reaction where 27.0 grams of mercuric oxide (a red solid compound) is heated and completely decomposes to give the elements oxygen and mercury. IF 2.0 grams of oxygen is produced by this reaction
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