1. science

    what is the reaction between hexane & iodine?
  2. chemistry

    for a given reaction, the activation ener
  3. chemistry

    Reaction between H2O2 +2NaOH
  4. Science

    Is photosynthesis a endothermic reaction
  5. chemistry

    A salt is obteind as a reaction between
  6. reaction

    conversion of cyclopropane to propene
  7. chemistry

    reaction between CuSo4+NaCl
  8. chem

    Balance the Following Reaction: Mg(s) + H2O(g)Mg(OH)2(s) + H2(g)
  9. Chemistry

    What is the equilibrium constant for the following reaction? 3A + 2B <---> 2C
  10. maths

    what is the equllibrium constant of KI + I2 reaction at 35 c?
  11. chem

    In the formation of sulfur hexaflouride, does the reaction at constant pressure or volume proceed more spontaneously? I've done the calcs to show that at constant volume, it is slightly more spontaneous, but I can't seem to find a good reason why... it
  12. Honors Chemistry

    On the same subject as before with the limiting/excess reagent stuff -- can someone please check my answer to make sure I'm doing it right? Thanks sooooo much!! :DD 3. Mg + 2HCl ==> MgCl2 + H2 -- What mass of hydrogen at STP is produced from the
  13. physics

    An 8.64g bullet is fired into a 365g block that is initially at rest at the edge of a table of h = 1.11 m height The bullet remains in the block, and after the impact the block lands d = 1.87 m from the bottom of the table. Determine the initial speed of
  14. Physics

    An 8.00 g bullet is fired into a 250 g block that is initially at rest at the edge of a table of 1.00 m height (Fig. P6.26). The bullet remains in the block, and after the impact the block lands 2.00 m from the bottom of the table. Determine the initial
  15. chemistry

    1. A student wanted to measure the amounts of (Ca2+) in the human blood. She got 1.00ml which she treated with Na2C2O4 solution. The resulting Ca2C2O4 precipitate was filtered and dissolved in dilute H2SO4 to release C2O42- into solution and allow it to be
  16. Chemistry II

    If 36.0 mL of 7.0e-4 M HClO4 is added to 19.5 mL of 8.2e-4 M LiOH, what is the pH of the solution? Write the equation. Calculate mols HCLO4. Calculate mols LiOH. Determine how much of which reagent remains after the reaction. pH = -log(H^+) post your work
  17. chemistry

    If 10L each of propane and oxygen are combined at the same temperature and pressure, which gas will be left over after reaction? What volume of that gas will remain? The answer is 8 L of Propane Tried for a while but I don't understand how answer books
  18. Chemistry

    SO2(g) + NO2(g) reverse reaction arrow SO3(g) + NO (g) At a given temperature, analysis of an equilibrium mixture found [SO2] = 4.00 M, [NO2] = 0.500 M, [SO3] = 3.00 M, and [NO] = 2.00 M. ---How many moles/liter of NO2 would have to be added to the
  19. English

    I am ask to creat a table that lays out a day-by-day plan to use as a job aid for your employment search that spans 3 weeks. Please provide some examples. I know what I need to do planning for a job but creating a table, I don't understand. Please help.
  20. chemistry

    I need help. I have no clue how to find this. A flask is charged with 1.680 atm of N2O4(g) and 1.220 atm of NO2(g) at 25 degrees celcius. The equilibrium reaction is N2O4 <-> 2 NO2 After equilibrium is reached, the partial pressure of NO2 is 0.550
  21. physics

    A soccer ball is kicked with an initial horizontal velocity of 16 m/s and an initial vertical velocity of 17 m/s. 1) What is the initial speed of the ball? 2) What is the initial angle θθ of the ball with respect to the ground? 3) What is the
  22. bio

    You have a sample of NaCl that contains 100 mg/ml NaCl. You are trying to perform an reaction that requires 10ml of 20 mg/ml. Enter in the correct amount (in ml) of Stock NaCl solution you need to use to make 10ml of 20 mg/ml NaCl
  23. Physics

    a 35 g ice cube at 0.0 C is added to 110 g of water in a 62 g aluminium cup. The cup and the water have an initial temperature of 23 C . Find the equilibrium temperature of this system? in Celsius ,, I've been trying to solve this for 2 hours now , and I
  24. Chemistry

    1. What will happen if I add water to a FeSCN+2 solution? FeSCN+2(aq) + H2O(l) <--> ???? 2. Will the equilibrium shift to the left or right? The FeCNS++ is red colored. I think adding water will simply dilute the red color. Won't it react in any way?
  25. Chem 112

    An equilibrium was established after 0.100 mol of hydrogen gas and 0.100mol of iodine gas were added to an empty 1.00L reaction vessel and heated to 700K. The color intensity of the mixture changed from deep purple to a lighter purple color. At
  26. Chemistry Lab

    The experimental data you entered is: Trial #1 Trial #2 Trial #3 Mass: gelatin capsule (g) .123 .118 .122 Mass: whole alka-seltzer tablet (g) 3.230 3.230 3.230 Mass: capsule + alka-seltzer sample (g) .822 .882 .677 Mass: system before reaction (g) 23.109
  27. Math

    A lecture hall has 108 chairs arranged in rows with the same number of chairs in each row. You eliminate three rows by adding six chairs to each of the other rows. How many rows are there now ? How many chairs are in each row ?
  28. Physics

    A batter hits a baseball so that it leaves the bat with initial speed of 40 m/s, at an angle of 60°. Tom Brady throws an incomplete pass at an initial speed of ~ 60 miles/hour (mph). When the ball was released, it’s initial velocity made an angle of
  29. physics!!

    An 8.82g bullet is fired into a 235g block that is initially at rest at the edge of a table of h = 1.05 m height (see the figure below). The bullet remains in the block, and after the impact the block lands d = 2.16 m from the bottom of the table.
  30. college physics

    An 7.81g bullet is fired into a 220g block that is initially at rest at the edge of a table of h = 1.15 m height.The bullet remains in the block, and after the impact the block lands d = 2.13 m from the bottom of the table. Determine the initial speed of
  31. physics

    An 8.82g bullet is fired into a 235g block that is initially at rest at the edge of a table of h = 1.05 m height (see the figure below). The bullet remains in the block, and after the impact the block lands d = 2.16 m from the bottom of the table.
  32. chemistry

    for the reaction to generate 2‐phosphoglycerate (2PG) from 3‐phosphoglycerate (3PG, ΔG = 0.83 kJ/mol; ΔGo’ = 4.4 kJ/mol. (R = 8.31 x 10‐3 kJ•K‐1•mol‐1) a)What is the ratio of 3PG:2PG in cells at 37C? I got 5.52
  33. Chem please help

    When a 0.650 g sample of a mixture of volatile hydrocarbons is burned in a bomb calorimeter with a heat capacity of 4920 J/°C, the temperature rises by 8.50 °C. What is the change in energy (in kilojoules) for the reaction? Calculate the energy change by
  34. chem

    a sample containing .800 moles of POCl3 is enclosed in a .5 liter vessel at a certain temperature. when the equilibrium for the dissociation reaction PCl3(g)<==>POCl(g) + Cl2(g) is attained, it is found that the vessel contains ,259 moles of Cl2.
  35. chemistry

    If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, what is the balanced equation for this
  36. Chem HW!! Difficult! HELP!

    Urea (H2NCONH2) is used extensively as a nitrogen source in fertilizers. It is produced commercially from the reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g) ---Heat pressure---> H2NCONH2(s) + H2O(g) Ammonia gas at 223°C and 90. atm flows
  37. Chemistry

    Chemistry equilibrium? Consider the reaction 2NO(g) + O2(g) = 2NO2(g) at 430C an equilibrium mixture consists of 0.020 mole of O2, 0.040 mole of NO, and 0.96 mole of NO2. Calculate Kp for this reaction given that the total pressure is 0.20 atm. I used
  38. chemistry

    The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our lungs as a gas. C6H12O6(aq) + 6 O2(g) → 6 CO2(g) + 6 H2O(l) Calculate the volume of dry CO2 produced at body temperature (37°C) and 0.980 atm when
  39. Biology

    hi! so for science we have to make an experiment on temperature. we have to base our experiment on the given materials (which include test tubes, aluminum foil, cotton, fan) i chose a fan and I'm thinking of doing an experiment on how the strength of wind
  40. physics

    A mass is given an initial velocity up a frictionless 28 deg. incline and reaches a vertical hight of 1.35m. What was the initial velocity?
  41. Chemistry

    In a student's experiment, when 40 mL of 6% (w/w) hydrogen peroxide solution was reacted with 10 mL 0.5 M FeCl3 solution, a ΔrH of -3,382 J was calculated. Calculate ΔH for this reaction in kJ mol-1. Give your answer to 2 decimal places, do not
  42. physical

    A 0.8 kg block of wood has an initial velocity of 0.25 m/s as it begins to slide across a table. The block comes to rest over a distance of 0.72m. a) what is the average frictional force on the block? b)How much work is done on the block by friction? c)How
  43. chemistry

    I posted this question last night but did not get an answer- I am posting again because I have an exam I am studying for and do not understand this concept! Thanks! Using the given data, and the table of Standard Reduction Potentials, find the standard
  44. physics

    How do i go about this question? Suppose a car is traveling at 20.0m/s, and the driver sees a traffic light turn red, After 0.530s has elapsed (the reaction time), the driver applies the brakes, and the car accelerates at 7.00m/s2. What is the stopping
  45. physics

    Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. The initial speeds are such that both arrows reach their maximum heights at the same instant, although these heights are
  46. physics

    Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. The initial speeds are such that both arrows reach their maximum heights at the same instant, although these heights are
  47. Physics

    Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. The initial speeds are such that both arrows reach their maximum heights at the same instant, although these heights are
  48. writing

    This is the assignment: Reread either Andy Rooney’s essay on page 96 or Sarah Penning’s essay on page. 97. Select either essay as your starting point and discuss the terms they write about. What is your reaction to the thesis of either in relation to
  49. physics

    Ten ,one rupees coin are put on the top of at each other on a table each coin has a mass 'm' give the magnitudes and direction of - 1. The force of seventh coin (counted from bottom) due to all the coins. 2. The reaction of 6th coin on the 7th coin. 3. The
  50. physics

    The vertical and horizontal component of the initial velocity of a projectile are 36m/s and 64m/s. Find the initial velocity and angle inclination
  51. phyics

    A gymnast bounces upward from a trampoline at an initial height of 1.2m and reaches a maximum height of 4.8m before falling back down. What was his initial speed?
  52. Physics

    A projectile is launched at 5.4 m/s with an initial angle of 22 degrees from an initial height of 2.6 meters. Where will it land? How fast, and at what angle will it be going when it hits the ground?
  53. Physics

    Consider the motion of the two projectiles fired at t = 0. Their initial speeds are both v0 but they are fired