What is the principal environmental concerns about the continued use of plastics? Name some secondary concerns.
Suppose you were given samples of two different liquids. Describe how you would determine which one is more voliatile.
If auto gas mileage of 28.5 miles per gallon, how many kilometers can it travel on 1.0 litre of gas? What is formula to figure?
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).
What chemical symbol is used as the equivalent of 2superscript 1subscript H? Name and give the chemical symbols for the elements with the first 10 atomic numbers.
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?
Which molecule does not exhibit dipole-dipole forces. SO2, ICl, H2O, CH4.
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]
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
Explain. 4.4 x10 -2 ) (2.2 x 10-7) that is 10 to the minus 2 and 10 to the minus 7.
How much of a 5 M stock solution of HCl is needed to make 250 mL of a 0.1 M solution of HCl?
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. 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?
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.
Characteristic chemical differences between metals and non-metals, corresponding phosphorus and arsenic compounds
What are the characteristic chemical differences between metals and non-metals? Explain why corresponding phosphorus and arsenic compounds resemble each other more closely than they do nitrogen compounds. Name each of the following ions or compounds. (see the attachment for the compounds)
"What would the world be like where water is as dense as a solid rather than a liquid?" Ideas occur.
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.
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
Please explain steps taken to establish the center of mass with polar covalent bonds and dipole moments - why is this important?
What got oxidized, what got reduced, the oxidizing agent, the reducing agent, spectator ions? Please help me identify 5 things
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.
Suppose a bottle is labeled 3.50 x 10-7 M M(OH)3, where M = an unknown metal. What are the values of [H3O+] and [OH-]?
Which of the following is true of Cu-36? It has ________. a. 29 electrons b. 63 protons c. 63 neutrons d. 29 neutrons.
Balance the equation with the SMALLEST WHOLE NUMBER COEFFIECIENTS possible. Choose the number that is the sum of the coefficients in the balanced equation. As2S3 + O2 -> As4O6 + SO2 a. 17 b. 16 c. 21 d. 20 e. 18.
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.
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?
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%?
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.
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)).
A radio station announcer reports the atmospheric pressure to be 99.6 kPa. What is the pressure in atmospheres? In millimeters of mercury?