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What fragmentation would give rise to the peak at m/z 45 in the Mass Spectrum?
a. Loss of hydroxyl group.
b. Loss of methyl group.
c. Loss of ethyl group.
d. Loss of isopropyl group.
Which is the limiting reagent in the reaction between Copper sulfate pentahydrate and ammonia?
Dibenzalacetone is commonly used in sunscreens. Suggest what properties are valuable in a compound for use as a sunscreen.
dissolving one mole of a non-volatile solute in 4 moles of a volatile solvent. If the vapor pressure of the pure solvent is 20 torr, what will be the vapor pressure of the solution.
What percentage error would be introduced in a 35.0 mL sample of liquid if the air bubble comes out of the tip of the buret while the liquid sample is being transferred?
Since the sample is an unknown solid, I will have to make a solution without knowing exactly what to mix. In your expertise, how much of the solid do you expect to dissolve in what volume of water and what is your reasons for choosing these amount..
Once the pKw's at the three temperatures are determined, the Van't Hoff equation can be used to determine Delta H for the reaction, and from that Delta G, and Delta S can be calculated.
Two students prepare two cyclohexane solutions having the same freezing point. Student 1 uses 26.6 g of cyclohexane solvent, and student 2 uses 24.1 g of cyclohexane solvent. Which student has the greater number of moles of solute Show calculation..
Which of the alkaline earth metal hydroxides, M(OH)2, would you expect to be most soluble in water? Least soluable?
for the reaction Mg+2HCl yeilds H2+MgCl2, calculate the percentage yield of magnesium chloride if 100.g of magnesium react with excess hydrochloric acid to yield 330.g of magnesium cholride.
A sample of gas occupies 15.0 liters at 4.00 atmospheres and 300 K. What is the new volume of the gas if pressure is decreased to 2.00 atmospheres and temperature is increased to 400 K?
What is the chemical balance equation and what causes the color and precipitation?
Consider a certain type of nucleus that has a rate constant of 2.92 s 10^-2min^-1. Calculate the time rquired for the sample to decay to one-fourth of its initial value.
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