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A 0.4047 g sample of primary standard grade potassium hydrogen phthalate (M.M. = 204.23) was dissolved in distilled H2O. The solution required 22.42 ml of the NaOH solution to reach the phenolphthalein end point. a. Calculate the number of moles of KHP? b. How many moles of NaOH will react with the KHP dissolved in water? c. Calculate the Molarity of the NaOH solution?
Nitrogen and hydrogen gases are combined at high temperatures and pressures to produce ammonia, NH3. If 104.7 g of N2 are reacted with excess H2, how many moles of NH3 will be formed?
In the first step of the trypsin mechanism, the side-chain oxygen of Ser 195 attacks the carbonyl carbon of the substrate. Use PyMOL and your model of the enzyme substrate complex to determine the distance between these two atoms.
what is the average power (energy per unit time) in units of watts (1W = 1J/s) associated with such a pulse? b. How many photons are emitted in such a pulse?
Plot the levels and first differences of lnrgdp and lnrstockval and briefly comment on the graphs and obtain and comment on the variance decompositions for 24 periods ahead based on the original ordering of the variables.
Prepare a short memo from giving your recommendations as to the proper reporting of the earthquake damage costs in the income statement for the year ending august 4, 1990.
What are the advantages and disadvantages of each bank's offering? Which bank and cash management service would you choose? Why? How can using a bank's cash management service reduce opportunity cost for a health care organization?
What generalization can you make asd to the relationship between marginal revenue and elasticity of demand? Suppose the marginal cost of successive units of output was zero.
what is the molality of a solution of 10g benzophenone and 1mL of cyclohexanone
calculate the amount of heat required to vaporize 8.48g of water at its boiling point
When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 18 grams of water from 8 grams of methane and 32 grams of oxygen
Balance the following equation in basic solution. indicate which reactant becomes oxidized during the reaction, which reactant becomes reduced
Consider the titration of 50.0 mL of 0.200 M HClO4 by 0.100 M NaOH. Calculate the pH after 37.7 mL of NaOH has been added.
How many moles of Fe(NO3)3 are required to prepare a 354.6 mL solution that is 9.737 moles/liter of NO3-?
Tank full of water (H2O)is open at the top with the hole near the bottom the area of which is 0.25 m^2 and the cross section area of the tank =1 m^2 determine what is volumetric flow rate out of the hole.
The state function to describe a particle on a sphere is given as Ψ=2sin^2(?)+cos?(θ).calculate the expectation value of its angular momentum about the z-axis, energy and the square of the total angular momentum L^2.
How many litres of NO are produced at STP when 162 g Ag reacts with excess HNO3
how many calories are used to heat a 50g sample of water from 8.1 degrees celius to 27.4 degrees celcius?
Ferrocene cannot be nitrated using the conventional HNO3-H2SO4 mixed acid conditions, even though nitration is an electrophilic
2.00 L of H2 at a pressure of 398 torr and 1.00 L of N2 at an unknown pressure. If the total pressure in the flasks is 331 torr after the stopcock is opened,
1.500 g of Mg(s) was combined with 125.0 mL of 1.0 M HCl. The initial temperature was 25.0oC and the final temperature was 72.3oC.
Explain why a mercury-in-glass thermometer with a uniform-bore capillary that is correct at 0 celsius and 100 celsius read 49.9 celsius when the temperature is actually 50 celsius.
Draw a structure for a compound that meets the following description: A compound C3H5N with an IR absorption at 2215 cm-1 but none at 3300 cm-1
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