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1. AP CHEMISTRY NEED HELP PLEASE!

   Calculate the enthalpy of combustion of C3H6: C3H6 (g) + 9/2 O2 (g) yield 3CO2 + 3H2O using the following data: 3C (s) + 3H2 (g) yield C3H6 (g) change in H= 53.3 kJ C(s)+O2 (g) yield CO2 (g) change in H= -394kJ H2 (g) + 1/2 O2 (g)

2. chemistry

   1. Chlorobenzene, C6H5Cl, is used in the production of chemicals such as aspirin and dyes. One way that chlorobenzene is prepared is by reacting benzene, C6H6, with chlorine gas according to the following BALANCED equation. C6H6

3. Chemistry

   Calculate the enthalpy change for the reaction 2C (s) + H2 (g) yield C2H2 (g) given the following reactions and their respective enthalpy changes: C2H2(g) + 5/2 O2(g) yield 2CO2(g) + H2O (l) = -1299.6kJ C(s) + O2(g) yield CO2 (g)

4. Chemistry

   Barium sulfate, BaSO4 is made by the following reaction. Ba(NO3)2(aq) + Na2SO4(aq)----> BaSO4(s) + 2NaNO3(aq) An experiment was begun with 91.77 g of Ba(NO3)2 and an excess of Na2SO4. After collecting and drying the product, 62.3

1. math

   Consider an 8% coupon bond selling for $953.10 with three years until maturity making annual coupon payments. The interest rates in the next three years will be, with certainty, r1 = 8%, r2 = 10%, and r3 = 12%. Calculate the yield

2. Math

   Part 1. A stock is selling today for $40 per share. At the end of the year, it pays a dividend of $2 per share and sells for $44. What is the total rate of return on the stock? What are the dividend yield and capital gains yield?

3. Chemistry

   When 4.0 mol of CCl4 reacts with an excess of HF, 3.0 mol of CCl2F2 (Freon) is obtained. The equation for the reaction is CCl4(l) + 2HF(g) --> CCl2F2(l) + 2HCl9g) State which of the statements are true about the reaction and make

4. Chemistry

   1. The reaction CO+2H2-CH3OH was carried and it is found that only 332g of CH3Oh is actually produced when 407g CH3Oh was the expected yield. What is the Percent yield? 2. If 112g of CaO is reactied with an excess of NH4Cl and

1. Chemistry

   In a reaction 2 moles of CH4 were reacted with an excess of Cl2. As a result 117gram of CCl4 is obtained. What is theoratical yield? Actual yield? %age yield?

2. science, Chemistry

   Sample Results: Mass (g) Trial 1 Trial 2 Filter paper 1.36 1.29 Filter paper + PbI2 3.20 3.09 PbI2 ? ? Calculations and Discussion Questions: ( show the step by step) 1. Calculate the mass of precipitate collected in Trial 1 and

3. Chemistry

   Methyl alcohol (wood alcohol), CH3OH, is produced via the reaction CO(g) + 2 H2(g) à CH3OH(l) A mixture of 1.20 g H2(g) and 7.45 g CO(g) are allowed to react. 4 points (a) Which reagent is the limiting reagent? (b) What is the

4. Chemistry

   4 Fe + 3 O2 -> 2 Fe2O3 1. If I react 3.00g Fe and 5.75g O2, what is the theoretical yield? 2. If I’m only able to produce 3.5g, what is my percent yield? 3. If I try again, and get a 95.0% yield, what is my actual yield? For the

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