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What is the difference between a chemical change and a chemical reaction
an infinitely sharp zone of solute is placed at the center of acolumn at time t 0. after diffusion for time t1 the
The energy required to ionize boron is 801 kJ/mol. What minimum frequency of light is required to ionize boron?
at room temperature 20 degrees celsius milk turns sour in about 64 hours. in a refrigerator at 3 degrees celsius milk
At an underwater depth of 245ft, the pressure is 8.39atm. What should the mole percent of oxygen be in the diving gas for the partial pressure of oxygen in the mixture to be 0.21 atm, the same as in air at 1 atm?
Question- Why does a heavier molecule like O2 compared to N2 move at a lower average velocity. Temperatures are the same. I know 02's molecular mass is higher but why else
the speed of a photon is 4.5x10^5 ms^-1. If the uncertainty in its momentum is to be reduced to .01 percent, what uncertainty in its location must be tolerated
Both magnesium and alumnium react with an acidic solution to produce hydrogen. Why is that only one of the following equations correctly describes the reaction
Explain what are the main natural and anthropogenic sources for the production of HOx, NOx and CIOx radical species? Explain any connections between the natural as well as anthropogenic sources of the various species
How do the structures of alcohols affect the production of Sn2 products. And how does the structure of alcohol affect the quantity of each elimination product formed
While equal molar amounts of the following sets of compounds are mixed in water, explain which will not form a buffer solution
write a program to compute the diameter in centimeters of a steel rod an aluminum rod and a copper rod which can
question an iron meteorite was analyzed for isotopic argon content. the amount of 36ar was 0.200mm3 stpper kg of
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