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Determine the best fit of the absorbance data to a straight line by using the method of least squares to report the best estimate of the slope and intercept of the calibration line.
A flask was weighed and filled with NO2 gas to a fixed pressure and temperature. The mass of nitrogen dioxide in the flask was found to be 1.40 grams.
Illustrate and label the structure for each of these enantiomers. Molecular stereo chemistry often influences what we smell. For example 4-(R)-limonene smells like turpentine, whereas 4-(S)-limonen
What is the vapor pressure of a solution if the vapor pressure of water at 90 degrees C is 0.692 atm, made by dissolving the 1.00 mole of urea in 1.00 kg of water?
Discuss how long will it take for the reaction to be 90% complete? It takes 42 min. for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M at 25 degree C.
What is the molarity of silver ion in the original solution if 23.6 mL of silver nitrate solution reacts with excess the potassium chloride solution to yield 0.877 g of precipitate.
Determine the numbers of times greater is the rate constant for this reaction at 520 deg. C then at 500 deg. C? R=8.31 J/mol*K. The activation energy for the reaction 2HI---} H2 + I2 is184 kj/mol.
Calculate by what factor the rate of reaction will increase when the concentration of A is doubled and the concentration of B is also doubled? The reaction, A+2B--> products, was found to have t
Determine the electron configuration of the phosphide ion (P3-) is Determine the numbers of unpaired electrons are there in the Lewis structures of a N3- ion?
Explain why we held our samples at room temperature for the duration of the experiment rather than at the body temperature.
Two science students set out to prove the Law of Conservation of Mass. they calculate that the mass of all the products in a chemical reaction will be equal to the mass of all the reactants.
Determine the heat evolved when the 75.0 mL of a 2.00 HCl solution reacts with a 37.5 mL of a 4.00 NaOH solution if the temperature rises from 20.0 C to 37.9 C. (Remember you are determining this b
The temperature of both solutions before mixing was 22.50 C, and it rises to 24.28 C after the acid-base reaction. Determine the enthalpy change for the reaction per mole of CsOH?
How can calculate the empirical formula of X when 5.00 g of X is titrated with NaOH, it is found that X has two acetic hydrogen and that 54.9 mL of 1.00 M NaOH is needed to completely neutralize it.
Suppose you should have some ideas about the characteristics of the molecule that would allow you to separate it from other molecules by looking at the monomer subunits of bimolecular.
A sample of approximately 5 grams of sodium hydroxide (MM 40) was weighed on an electronic balance. This sodium hydroxide was dissolved in sufficient water to make 700 mL of solution. Its mass was f
Determine the total volume of gaseous products, calculated at the 312°C and 721 torr, when an automobile engine burns the 100. g C8H18
Discuss how much phosphoric acid should be produced when 14.2 g. of phosphorus pent oxide reacts with the 10.8 g. of water yielding phosphoric acid.
People who suffer from kidney disease must undergo hem dialysis. Kidney disease is a serious ailment and is the fourth largest disease affecting Americans.
Calculate the number of moles in the .05 micrograms of a 300b pinsert DNA. There are 660 g/mol-bp. Calculate the molar ratio of insert to vector if you have 10 n g of vector that is 2686bp?
Explain in detail that what three things can be done in order for a solution to be mixed more completely? Give the names of a) H2SO4 b) HF c) NaOH?
Determine the numbers of g of MgCl2 are needed? Explain how you came about this answer. Determine the molarity of the MgCl2 solution? Explain how you came about this answer?
Given 400 mL of an aqueous solution which is having the 12 g of compound A, determine the numbers of grams of A could be removed from the solution by a single extraction with the 200 mL of diethyl e
Explain what stage of aerobic respiration results in the complete oxidation of pyruvate into the carbon dioxide?
Determine the concentration of sodium acetate [Na(CH3COO)] formed at the equivalence point when the 25.0 mL of 0.0750 M acetic acid (CH3COOH) are titrated with the 0.0300M NaOH.