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General Chemistry

Volatility

Suppose you were given samples of two different liquids. Describe how you would determine which one is more voliatile.

Working with molecules in first excited rotational state

Calculate the ratio of HCL molecules in the first excited rotational state to those in the ground state @ 25 C. Assume an equilibrium bond distance of 1.275 angstroms. the angstrom part of the problem throws me off, I usually start these out by solving Change in E = ( h ) ( c )(Wo), but this is a q (rot) prob, not a q (elec).

Isotopes of Hydrogen Elements

Name the three isotopes of the element whose atomic number is 1. (b) What collective name do we give to a mixture of these three isotopes when they are present in the same ratios as in the universe as a whole?

Conversions

The volume of a certain bacterial cell is 1.60 µm3. (a) What is its volume in cubic millimeters (mm3)? (b) What is the volume of 105 cells in liters (L)? [show all the conversion factors that were used in calculating the answers]

Particle in a Box Proportionality

A particle is constrained to lie along a one-dimensional line segment between 0 and a. The probability of finding the particle along this line segment is seen in attached file. A. Find the proportionality constant, ie., normalize the function. B. Calculate the expectation values of X and X^2 for n=1 and n=2. C. Find t

Dilution Processes

I need help in solving this word problem: A corrupt barman attempts to prepare 100ml of some drink by mixing 30ml of ethanol with 70 ml of water. Does he succeed? If not, what volumes should have been mixed in order to arrive at a mixture of the same strength but of the required volume?

Precipitation calculations

Precipitation Calculations. Will a precipitate of calcium sulfate (Ksp = 2.4 x 10-5) form when 50.0 mL of 0.00150 M calcium chloride and 25.0 mL of 0.0100 M sodium sulfate are mixed? Why or why not?

Colors and Bands

What color has the smallest band in the spectrum of a tungsten light bulb? I have guessed yellow because the waves are shortest but don't know if I am right.

Total Pressure

A closed flask contains a .25 moles of O2 which exerts a pressure of .50 atm. If .75 moles of CO2 is added to the container what is the total pressure in the flask? Please provide step by step instructions with explanation.

General Chemistry - Orbitals and Configuration

Which one of the following configurations depicts an excited oxygen atom? a. 1s22s22p2 b. 1s22s22p23s2 c. 1s22s22p4 d. [He]2s22p4 e. 1s22s22p1 In a ground-state manganese atoms, the _____ subshell is partially filled. a. 4s b

Radioactive Isotope Intravenously

Your patient needs to receive 7.2mCi of a radioactive isotope intravenously. the isotope is supplied in vials containing 7.00cc of liquid and each vial has an activity of 80mCi. How many mL of the liquid should your patient receive? How to set up this problem?Step by step instructions please.

Chemical Properties

Which of the following is true of Cu-36? It has ________. a. 29 electrons b. 63 protons c. 63 neutrons d. 29 neutrons.

Which pair consist of equalities?

Which pair consist of equalities? a. 3 x 10^-3 mL and 3 L b. 7 x 10^2 g/mL and 7 x 10^-9 kg/L c. 6 x 10^2 mm and 6 x 10^-5 m d. none of these pairs are equalities Explain how you derived at the answer.

Concentration of Salt

What is the concentration of g salt per 100 g water of a saturated solution in which 3.82 g of salt are dissolved in 9.54 g of water?

Percentage Yields

In the equation CaO+3C > CaC2+CO, where 75.5 kg of CaO produces 85.9 kg of Calcium carbide, how much calcium carbide will be produced if the percentage yield is 92.4%?

Gas Laws Photosynthesizing Autotrophs

Photosynthesizing autrotrophs use water to change carbon dioxide into glucose. Oxygen is a waste product. If the Beast's rose produces 0.500 mol of glucose, what is the pressure of (O2) that forms in the 5.0 L jar covering the flower in the cold castle (11 degrees celsius)? Do not worry about how the reactants got in.

Populated Rotational State as a Function of Temperature

Using the Boltzmann distribution given below, determine Jmax (quantum number of the most intensely populated rotational state) as a function of temperature. Then find Jmax for CN+ at 298 K and 1100 K. and CN+ bond length is 0.129 nm the Boltzman distribution: (Ni/N)= (exp(-ei/KT))/(sigma j exp(-Ej/KT)).

Atmospheric Pressure Conversions

A radio station announcer reports the atmospheric pressure to be 99.6 kPa. What is the pressure in atmospheres? In millimeters of mercury?