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Problem- For the reaction calculates how many moles of the product form when 0.031mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 2Ca(s) + O2(g) 2CaO(s)
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Compute the external pressure that must be applied to seawater 1.14 M total ion concentration at 10 C if the maximum concentration permissible in the product water is 176 mg/L. Presume that all the dissolved salts in the product water are sodium c..
which characteristic defines the main difference between a basic buffer system and an acidic buffer system?a basic
Arrange the following ionic compounds in order of decreasing amount of energy released in lattice formation:
water from 20 degrees Celsius to 100 degrees Celsius. What is the delta H of combustion of the propane. What is the sign (positive or negative) of delta H?
question an unknown mass of each of the following substances initially at 24.0 c absorbs 1920 j of heat. the final
The blank solution utilized to calibrate the spectrophotometer is 10.0mL of 0.2 M Fe(NO3)3 diluted to 25.0mL with 0.1 M HNO3. Explain why is this solution preferred to simply utilize de-ionized water for the calibration
A 4.61*10^-3 mole sample of HY is dissolved in enough H20 to form .086L of solution. If the pH of the solution is 2.64, what is the K_a of HY
The specific heats of ice and water are 2.09 and 4.184 J/g.°C, respectively. The heat of fusion for water is 334 J/g.
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
The Ni2 extracted from the column was treated witn 25.00 mL of 0.05804 M EDTA. How many milliliters of 0.02282 M Zn2 is required for the back titration of the Ni2 solution?
For which substances would you predict the highest boiling point? Answer with explanations as to why?
what volume of bleach (6%w/v=6g/100ml) would be required to oxidize 5.0 mL of methanol (density 0.890 g/ml) to methanone?
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