Ceamus Angelina

Most popular questions and responses by Ceamus Angelina
  1. Chemistry

    Carbon dioxide gas and liquid water form solid glucose (C6H12O6) and oxygen gas during photosynthesis. Chlorophyll absorbs light in the 600-700 nm region. a) Write a balanced thermochemical equation for the formation of 1.00 mol of glucose. ... I know that

    asked on March 13, 2018
  2. Chemistry

    What is the shortest possible wavelength for a line in the Balmer series?

    asked on April 7, 2018
  3. Chemistry

    At 1200 K a gaseous mixture contains 0.30 moles of carbon monoxide, 0.10 moles of hydrogen, 0.20 moles of water vapor and 0.059 moles of methane in a 1.00 liter container. Determine whether or not equilibrium has been reached for the following reaction:

    asked on July 9, 2018
  4. Chemistry

    A 10.0 L vessel contains 0.0015 moles carbon dioxide and 0.10 moles of carbon monoxide. A 5.00 gram sample of carbon is added and the temperature is increased to 1000. degrees C. Will more carbon monoxide form? Kc at 1000 degrees C is 1.17. CO2(g) + C(s)

    asked on July 9, 2018
  5. Chemistry

    The rate constant for the reaction is 0.710 M–1·s–1 at 200 °C. A ---> products If the initial concentration of A is 0.00390 M, what will be the concentration after 595 s?

    asked on July 1, 2018
  6. Chemistry

    Radioactive iodine-131 decays (beta emitter) to form Xenon-131. Iodine-131 has a half-life of 8.07 days. If a thyroid gland absorbed 20.0 microcuries of I-131 today, how many microcuries would remain after 30.0 days. Microcuries are disintegrations per

    asked on July 1, 2018
  7. Chemistry

    An aqueous sodium salt (NaCnH2n+1O3) solution has an osmotic pressure of 2.041 atm when 1.068 g of the salt are dissolved in 200. g of water at 25 degrees C. Assuming molality and molarity in such a dilute solution are the same and that the sodium salt is

    asked on May 24, 2018
  8. Chemistry

    What is the period 6 element that forms a 4+ ion with a pseudo-noble gas configuration? How can I find the solution? Thanks

    asked on April 6, 2018
  9. Chemistry

    Phosphorus pentachloride reacts to form phosphorus trichloride and chlorine gas when heated. A 2.00 liter vessel contains 0.020 moles of phosphorus trichloride and chlorine at equilibrium. How many moles of phosphorus pentachloride are present? Kc=0.0415

    asked on July 9, 2018
  10. Chemistry

    A reaction of importance in the formation of smog is that between ozone and nitrogen monoxide described by O3(g)+NO(g) --> O2(g)+NO2(g) The rate law for this reaction is: rate=k[O3][NO] Given that k = 2.87 × 106 M–1·s–1 at a certain temperature,

    asked on July 1, 2018
  11. Chemistry

    Consider the hypothetical reaction: A + B + heat ⇌ C + D (All species are in the gaseous phase) What will happen to the concentration of A, B, C, and D under each of the following conditions? a) A catalyst is added to the system, which is at equilibrium

    asked on July 6, 2018
  12. Chemistry

    A volatile liquid sample is placed in an Erlenmeyer flask that has been sealed except for a tiny hole that allows vapor to escape. Upon heating, the liquid is converted to vapor that fills the flask. Cooling the flask allows the vapor to condense back to

    asked on May 8, 2018
  13. Chemistry

    Consider the equilibrium: H2O(l) + HC2H3O2 ⇌ H3O+ + C2H3O2- ( All species are aqueous) Why will the addition of NaOH to a solution of acetic acid cause the concentration of the acetate ion to increase?

    asked on July 6, 2018
  14. Chemistry

    Determine a possible Lewis Structure for each of the two compounds X and Y, given the following information: Compound X contains only carbon, hydrogen, and oxygen. It is heated in a 1.00 liter flask to 160. degrees C and 1.00 atm until all of it has

    asked on June 5, 2018
  15. Chemistry

    Consider the following properties of a particular substance: melting point: -7.2 degrees C boiling point: 58.8 degrees C heat of fusion: 10.571 kJ/mol specific heat of the solid: 87.4 J/mol degrees C specific heat of the gas: 40.0 J/mol degrees C specific

    asked on May 2, 2018
  16. Chemistry

    What is the element that forms a 3+ ion with electron configuration [Ar] 3d^6? I know that [Ar] 3d^6 is Fe, but how can I find an element that forms the 3+ ion? Thanks

    asked on April 6, 2018
  17. Chemistry

    A reaction of importance in the formation of smog is that between ozone and nitrogen monoxide described by O3(g)+NO(g) --> O2(g)+NO2(g) The rate law for this reaction is: rate=k[O3][NO] Given that k = 2.87 × 106 M–1·s–1 at a certain temperature,

    asked on July 2, 2018
  18. Chemistry

    A solid nonelectrolyte with a mass of 11.32g is dissolved in 115.00g of water. The observed freezing point of the solution is-3.44 degrees C. Given Kf of water=1.86 degrees C/m, what is the molar mass of the unknown solid?

    asked on May 16, 2018
  19. Chemistry

    A 50.0 L reaction vessel contains 1.00 moles of nitrogen gas, 3.00 moles of hydrogen gas and 0.500 moles of ammonia gas. Explain how this reaction will proceed if Kc=0.500 at 400 degrees C. N2(g) + 3H2(g) ⇌ 2NH3(g)

    asked on July 9, 2018
  20. Biology

    How many repeats do you find in the most common D1S80 allele?

    asked on May 8, 2018
  21. Biology

    Why can you not use human DNA polymerase when you perform PCR?

    asked on April 27, 2018
  22. Biology

    What volume range is a P20 (micropipette) useful for?

    asked on April 9, 2018
  23. Chemistry

    Calculate the longest wavelength that a line in the Balmer series could have.

    asked on April 7, 2018
  24. Chemistry

    What is the period 3 element whose 2+ ion is isoelectronic with neon? How can I find the solution? Thanks

    asked on April 6, 2018
  25. Chemistry

    What is the element whose d sublevel is filled and its highest energy electron has the set of quantum numbers: n=4, l=0, ml=0, ms=+1/2

    asked on April 5, 2018
  26. Chemistry

    Consider the decomposition reaction: AB(g)-->A(g)+B(g). The rate law for the reaction is: rate=k[AB]^2, where k=0.00846 M^-1 min^-1. After 5.25 hours, what is the percent of AB that decomposed if the initial concentration is 2.00 M?

    asked on June 28, 2018
  27. Chemistry

    What is the chemical reaction for: The oxidation of methanol

    asked on June 3, 2018
  28. Chemistry

    The following reactions is a first order reaction with respect to nitrite ion and its rate constant is 0.0030/s. In a solution that is 10.0 M NO2-, what is the half-life of the reaction? NH4+ + NO2- -->N2 + 2H2O

    asked on July 1, 2018
  29. Chemistry

    What is the chemical reaction for: The reaction of propanoic acid and 1-butanol

    asked on June 3, 2018
  30. Biology

    If your mom had alleles containing 18 and 21 repeats and your dad had alleles containing 18 and 24 repeats, what is the change you will be homozygous for the 18 repeat allele?

    asked on May 8, 2018
  31. Biology

    If, on your gel, you saw only one band, how would you describe your genotype?

    asked on May 8, 2018
  32. Chemistry

    A metal forms an oxide with the general formula MO2 with a deltaHf=-580.7 kJ/mol. Using the Born-Harber Cycle and the following information, determine lattice energy for the compound. Metal Information: deltaHsubl=302 kJ/mol, IE1=708.6 kJ/mol, IE2=1412

    asked on April 17, 2018
  33. Biology

    How many alleles for a specific gene can any single gamete contain?

    asked on April 9, 2018
  34. Chemistry

    What is the chemical reaction for: The reaction of phenol and 1-propanol

    asked on June 3, 2018
  35. Chemistry

    What is the chemical reaction for: The reaction of bromine with 2-pentene

    asked on June 3, 2018
  36. Chemistry

    What is the chemical reaction for: The oxidation of 2-pentanol

    asked on June 3, 2018
  37. Biology

    How big of a band on a gel would you expect to see for the 41-repeat allele?

    asked on May 8, 2018
  38. Biology

    Which technique or device is used to determine probabilities of allele combinations in offspring?

    asked on April 9, 2018
  39. Biology

    Which rule of probability is used for mutually exclusive outcomes?

    asked on April 9, 2018
  40. Chemistry

    What is the smallest metal in Group 4A? Is it Carbon?

    asked on April 6, 2018
  41. Chemistry

    What is the element whose 4+ cation has the following set of quantum numbers, n=3, l=2, ml=0, and m.s=+1/2 for its highest energy electron? I know, based on the quantum numbers, that its referring to a 3d sublevel. How can I find the solution? Thanks

    asked on April 6, 2018
  42. Chemistry

    Compound Y+ K2Cr2O7 ---> C6H12O2 What is compound Y?

    asked on June 6, 2018
  43. English

    What makes genre analysis an important intellectual exercise?

    asked on June 4, 2018
  44. Biology

    Name a specific region of a plasmid vector that is helpful in DNA cloning. Is there a specific article that explains the answer? There are no choices to the question.

    asked on April 17, 2018
  45. Chemistry

    Assign n_hi for each line in the Balmer series of a hydrogen atom.

    asked on April 7, 2018
  46. Chemistry

    What is the element whose 2+ cation's highest energy electron has the following set of quantum numbers, n=5, l=2, ml=1, and m.s=+1/2 for its highest energy electron? I know, based on the quantum numbers, that its referring to a 5d sublevel. Is it Ba? How

    asked on April 6, 2018
  47. Chemistry

    The rate constant for the rxn of hydrogen reacting with iodine to form hydrogen iodide is 2.7 X 10^-4 L/mol*s at 600. K and 3.5 X 10^-3 L/mol*s at 650. K. a) determine the activation energy for this reaction. b) determine the rate constant at 700. K

    asked on July 1, 2018
  48. Chemistry

    The half-life of the following first order reaction is 231 seconds. What percent of the original concentration of nitrite ion remains after 10.0 minutes? NH4+ + NO2- --> N2 + 2H2O

    asked on July 1, 2018
  49. Chemistry

    A compound contains 25.19% S and 74.81% F. Its density is 10.05 g/L at 35 degrees C and 1.00 atm. Draw the Lewis structure for this compound. Determine its shape, polarity, hybridization and any nonzero formal charges.

    asked on April 25, 2018
  50. Chemistry

    What is the Period 4 element with highest energy level filled. My answer is Kr, but I'm not entirely sure. Is this correct?

    asked on April 6, 2018
  1. Chemistry

    i know how to do the first part, I just need the second part of the problem.

    posted on July 2, 2018
  2. Chemistry

    So I'm thinking to start with the PV=nRT with the given pressure, volume, and temperature then find how many moles there are in compound X. After that divide the given mass of the compound (3.267 grams) by the calculated number of moles to find the molar

    posted on June 5, 2018
  3. Chemistry

    ***** not methanol, it's methanal *****

    posted on June 3, 2018
  4. Chemistry

    This makes total sense. The answer in fact is Co. So one would need to think the way you described to find Co

    posted on April 7, 2018
  5. Chemistry

    then what is it?

    posted on April 7, 2018
  6. Chemistry

    Is it Ge?

    posted on April 6, 2018