Newest questions posted by sienna
  1. Math

    A car travels 300 miles on 15 gallons of gas
  2. math

  3. Chemistry

    How many moles of nitric oxide are formed from 0.60 mole of nitrogen dioxide
  4. Chemistry

    In the reaction between bromine and sodium, a bromine atom gains an electron. What ion is formed? Is the bromine oxidized, or is it reduced?
  5. look adverb and verbs

    The farmers need to water them every day is this correct answer water every day
  6. english

    what is a concrete noun
  7. S.S

    How do I write a one page essay on 'If I were a settler, where would I settle and what would my surroundings be?'
  8. Accounting

    The annual interest rate for a customer’s loan of $675 is 19.25%. What is the total dollar amount to be repaid on the loan, including principle and interest, for the entire year?
  9. Calculus

    Write a slope field for the differential equation. Corporate administrators notice that 13% of their employees retire each year, while 2,500 are newly hired. What is the long term effect if they initially have 30,000 employees?
  10. Math

    A shopkeeper packages together two types of hard candy: peppermint and cinnamon. Separately the peppermint candy sell for $1.80/kg and the cinnamon candy sells for $2.40/kg. The mixture sells for $2.16/kg. Determine the amount of each type of candy that is
  11. math word problem

    A rectangular bathtub with a base of 18 ft^2 is filling with water at a rate of ..7ft^3 per minute. How fast is the water level rising after 3 minutes?
  12. pre calc - polynomials & factoring

    perform the opertaion and write the result in standard form... (2x^2 + 1) - (x^2 - 2x + 1)
  13. heat of solution

    the heat formation of NH3 is -11.04 Kcal/mole. HOW would you calculate the heat of formation of NH3 in Kj/mole?
  14. molar heat

    the molar heat of vaporization for water is 40.79 kJ/mol. How would you express this heat of vaporization in joules per gram.
  15. chemm

    A car air bag requires 70. L of nitrogen gas to inflate properly. The following equation represents the production of nitrogen gas: 2NAN subscript 3 yielding 2NA + 3N subscript 2 the density of nitrogen gas is typically 1.16 g/L at room temperature. How
  16. CHEM

    given the general chemical equation, A yields 3C + D , a. how many moles of C can be produced from one mole of A? b. how many moles of D can be produced from four moles of A?
  17. chem

    if the reaction type is Synthesis then what would be the product of.. Fe subscript 2 O subscript 3 + H subscript 2 O
  18. CHEM_

    if 16.5 of iron (II) sulfide contain 6.02 x 10^23 formula units, how many formula units of iron (II) sulfide are in 1.00 mL of iron (II) sulfide? The density of iron (II) sulfide is 4.84 g/cm^3
  19. CHEM

    how many gram of potassium bromide can be made from 13.7 grams of potassium and unlimited bromide
  20. chemistry

    how to write the oxidation number for CL4
  21. chemistry

    what is the smallest fraction of a milliliter to which you can make a measurement
  22. chemistry

    how would the electrons produced in a cathode ray tube filled with neon gas compare with the electrons produced in a cathode ray tube filled with chlorine gas?
  23. 6th grade science

    what is a boundary between two air masses called
  24. phys.

    suppose your local electric company charges $0.0650/kWxh for the first 200.0 kWxh, and then drastically raises the price for every kilowatt-hour more. What is the maximum you family would pay if they wanted to pay only the cheaper rate?
  25. phys.

    a computer with a power input of 230.0 W (watts) has a resistance of 91.0 Ohms . how do you find the current in the computer?
  26. algebra

    What is -17p + 12p - 11p
  27. thermochemistry

    what is the enthalpy change in kilojoules for the combustion of 1 mol of ethanol, C2H5OH (l), to form gaseous carbon dioxide and gaseous water? use bond energies to calculate your answer. (hint: there is a double bond in carbon dioxide and oxygen) the
  28. Predicting products for electrolysis

    when you have your 4 different equations to form 4 different possible equations, what two equations do you use for water, O2(aq) + 4H+ + 4e- ----> 2H20 (+1.23) 02 (g) + 2H2O (l) + 4e- ----> 4OH- (+0.40) 2H20 (l) + 2e- ---> h2 (g) + 2OH- (aq) (-0.83) I'm
  29. Electrochemistry

    Hi, I'm in my final year of high school doing an electrochemistry unit and there is a concept I just don't really get. I would appreciate all helps please-- Redox reaction half reactions are: Oxidation: Zn(s) --> Zn 2+ (aq) + 2e- Reduction: Cu2+ (aq) + 2e-