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A 0.355 g sample of a solid, monopractic acid having a molecular weight of 12g/mol requires 18.47 mL NaOH for neutralization. Calculate the molarity of the NaOH solution.
Caffeine, C8H10N4O2,is a stimulant found in tea and coffee. A sample of the substance was dissolved in 47.0 g of chloroform,CHCl3, to give a 0.0920m solution. How many grams of caffeine were in the
A student adds 4.00g of dry ice (solid CO2) to an emptyballoon. What will be the volume of the balloon at STP after allthe dry ice sublimes (converts to gaseous CO2)?
A particular brand of gasoline has a density of 0.737 g/mL at 25degrees C. How many grams of this gasoline would fill a 12.0 galtank?
What do you think might happen during the solvent migration up the paper if the two long edges of the filter paper overlapped when folded into a cylinder?
Calculate the best extimate of the density and 95% Confidence level. How does the calculation of uncertainty compare with the expected experimental uncertainty based on propagation of errors?
A photon in the gamma ray region of the electromagnetic spectrum has an energy of 9.12 × 10-14 J, calculate the wave length in pm of the photon. Express answer in scientific notation.
A Li2+ ion emitts a photon with a wavelength of 5.41× 101 nm, calculate the energy difference(absolute value) in J between the initial and final state of theLi2+ ion. Express answer in scient
The energy levels the electron can occupy in the H atom can be calculated using the energy level equation. Calculate the wavelength (nm) of the photon emitted when the electron goes from a n= 4.00 e
What is the half-life of a compound if 81percent of a given sample of the compound decomposes in55 min? Assume first-order kinetics
Explain why it is necessary to remove the Erlenmeyer flask from the hot water bath at the moment the volatile liquid disappears from the flask, rather than while there is still water liquid in the f
Calculate the total heat change, the ΔE, the PV work, and the ΔH when 54 g of ice is converted into54g of steam. [H2O(s) at -10°C converted toH2O(g) at 110°C].
Argon crystallizes in the face-centered cubic arrangement at 40 K. Calculate the mass of the unit cell of solid argon in grams.
Heating oil is circulated in a circular conduitat an average velocity of 0.30 m/s. The diameter of the conduit is25 cm. The density of the oil is 810kg/m3.
Two ideal gases, A and B, are at the same temperature, volume andpressure. Gas A is reversibly expanded at constant temperature to avolume V.
Explain why the carbonyl group ( C=O ) group of methyl benzoate is a m-directing group. would you expect methylbenzoate to undergo EAS reaction such as nitration faster or slowerthen benzene? why?
Calculate the amount of Ca(NO3)2 x4H2O(s) needed so that the Ca2+ isin excess of the iodate ion concentration by 20% (i.e., calculate aweight of calcium nitrate that is 20% higher than the minumum r
The air in a bicycle tire is bubbled through water andcollected at 25 degrees Celsius. If the total volume of gas collectis 5.45L at a temperature of 25 degrees Celsius and a pressure of745 torr, h
A wooden cylinder 30.0cm high floats vertically in a tub ofwater with density = 1.00g/cm3 . The top of the cylinderis 14.1 cm above the surface of the liquid. What is the density of the wood?
By what factor does the rate of the reaction with the following rate law change if the concentrations of NO2 andCl2 are doubled. Rate =k[NO2]2[Cl2]. Express answer as whole number.
What voltage would you expect based on the joule tomson coefficient value for CO2 if op amp is set to 100 for a pressure drop of 90 psi across frit for this gas?
What volume of H2 could be produced at atemperature of 13 oC and a pressure of 760 torr by the reaction of 2.01 g of aluminum with hydrochloric acid?
Can someone please help explain why the negative slope of thesolid liquid line in the H2O phase diagram is unique? What does this situation tell about the density of liquid H2O andice?
If the EDTA had been dissolved in 100ml of 2.5M NaOH andsufficient water is added to make 1L, what major ionization formsof EDTA would be present? What would be the pH of the solution?
At combustion temperatures, the equilibrium constant for thereaction of N2 with O2 is about 10^-14. Calculate the concentration of NO that is in equilibrium with atmospheric levels of nitrogen and o