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The compound butane consists of only C and H. If 0.446g of butane is burned in oxygen and produces 1.40g CO2 and 0.537g H2O, what is the empirical formula of butane?
The pH of a solution of HN3 was found to be 4.7, find the original concentration of the hydroazoic acid, HN3
What is the frequency of ultraviolet light with wavelength 2.51 × 10-8 m? (c = 3.00 × 108 m/s)
draw an energy level diagram for Hydrogen starting at n=2 and ending at n=6. (n=1 transitions are high-energy transitions and emit in the ultra-violet region).
Which of the following would be expected to be the most stable carcocation. Using good scientific terminology with the aid of structures/equations, clearly explain your answer.
radio wave radiation falls in the wavelength region of 10.0 to 1.00e3 meters. what is the frequency of radio wave
Draw an approximante titration curve for the titration of 75 mL of 0.020 M NH3 (pKa of NH4=9.24) with 0.10 M HCl. Label the axes
If 7.85 x 10 to the 24th power Sc atoms react with excess CaO, how many grams of each product will form? You will need to determine the equation of the reaction.
At 25 degrees Celsius the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10^-3 min^-1 If the starting concentrate of pesticide is 0.0314M what concentration will remain after one hour at 25degreesC
A Pb-Sn alloy containing 40 wt% Sn is cooled from the liquid state to room temperature. How much of each phase is present in the material at room temperature. Sketch the expected microstructure.
What is the relationship between myelin sheath and dopmaine? What does myelin sheath do, how does it porvide insultion. What disease are caused when myelin sheath stops working and how does this effect elderly people?
the compound as2i4 is synthesized by reaction of arsenic metal with arsenic triiodide. if a solid cubic block of
The specific heat of iron metal is 0.450 J/g-K. How many J of heat are necessary to raise the temperature of a 1.05-kg block of iron from 25.0 Celcius to 88.5 Celcius
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