04/26/17

Using standard heats of formation, calculate the standard enthalpy change for the following reaction.
C2H4(g) + H2O(g)CH3CH2OH(g)
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04/26/17

Using standard heats of formation, calculate the standard enthalpy change for the following reaction. C2H4(g) + H2O(g)CH3CH2OH(g)
Using standard heats of formation, calculate the standard enthalpy change for the following reaction. C2H4(g) + H2O(g)CH3CH2OH(g)
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04/26/17

A scientist measures the standard enthalpy change for the following reaction to be -821.1 kJ:
CH4(g) + 2 O2(g)CO2(g) + 2 H2O(g)Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H2O(g) is kJ/mol.
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04/26/17

A rectangular garden is 2 ft longer than it is wide. Its area is 575 ft^2. What are its dimensions
I need help on this probl please help me
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04/26/17

solve 10+5x=8x-14 please show step by step
solve 10+5x=8x-14 please show step by step
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04/26/17

a car increases uts speed from 30 mph to 80 mph in 3 seconds. what is the acceleration of the car
a car increases uts speed from 30 mph to 80 mph in 3 seconds. what is the acceleration of the car
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04/26/17

When 1.00g Aluminum is reacted with hydrochloric acid how many molecules of hydrogen are produced along with aluminum chloride
We must balance the equation to solve with stoichiometry.
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04/25/17

How many mL of concentrated H2SO4 are needed to decrease the pH to 1.5 of 10 mL of a 0.1 M NaOH solution?
How many mL of concentrated H2SO4 are needed to decrease the pH to 1.5 of 10 mL of a 0.1 M NaOH solution?   Thanks
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04/25/17

For glass bottle containing clear, colorless solutions are left
 For glass bottle containing clear, colorless solutions are left on a lab bench with the following labels lying nearby in a jumbled pile Pb2+ (aq), Cl- (aq), Ag+ (aq), (SO4)2- (aq). You number  The... more
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04/25/17

A huge pharmaceutical company is polluting the water supply of your town.
A huge pharmaceutical company is polluting the water supply of your town. You know the company uses Aqueous iron in its factory and you have a hunch that somehow this iron is finding its way into... more
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04/25/17

Given the following aqueous reactions, write a balanced chemical equation to described the reaction that occurs when they are mixed.
Given the following aqueous reactants, write a balanced chemical equation to described the reaction that occurs when they are mixed. Include the formulas and psychical states of each reactant and... more
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04/25/17

A hamburger weighs 0.33 pounds, and an order of a French fries weighs 0.75 pounds.how many pounds total will a meal of a hamburger and French fries weigh?
 SOlve this please.                 
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04/25/17

solve 2*(3x + 2) = 8x-2 please show step by step
solve 2*(3x + 2) = 8x-2 please show step by step
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04/25/17

solve 10+5x= 8x-15 please show steps on how you solved it
solve 10+5x= 8x-14 please show steps on how you solved it!
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04/25/17

If I got 60 out of 120 find percentage? Total marks divided in exam maths=60,physics=30,chemistry=30
About percentage 
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04/25/17

Please Help! Physics-EM Waves
Combing your hair leads to excess electrons on the comb. How fast would you have to move the comb up and down to produce green light? (Assume λ = 569 nm.)
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04/24/17

What is the concentration of OH- in a solution if the pH is
a. pH = 4.07[OH-] =   b. pH = 0.32[OH-] =   c. pH = 13.68[OH-] =   d. pH = 7.41[OH-] =
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04/24/17

Calculate the pH of a solution in which
a. [H3O+] = 7.2 x 10-5 MpH =  b. [H3O+] = 6.5 x 10-7 MpH =  c. [H3O+] = 8.5 x 10-6 MpH =  d. [H3O+] = 8.8 x 10-7 MpH =
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04/24/17

Calculate the H3O+ concentration present in water under the following conditions. Enter your answer in scientific notation.
b. [OH-] = 9.2 x 10-4 M c. [OH-] = 2.0 x 10-10 M
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04/24/17

You bought seven pencils and paid $3.40 after a 24% discount. What was the original price of one pencil?
 Seven pencils for 3.40 dollars AFTER a 24% discount. How much is the ORIGINAL PRICE OF ONE PENCIL?
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04/24/17

When 36 is subtracted from the square of a number , the result is five times the number . what is the possible solution ?
   Quadratic application problems
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04/24/17

Convert ounces to pounds
The mass of a chocolate bar is 7 ounces. A box contains 160 chocolate bars. What is the total mass of the chocolate bars in pounds?
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04/24/17

Which expression could be used to solve for the length of the rectangle?
A rectangle with an area of 240^2 has a length 10 inches shorter than 5 times it's width.
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04/24/17

If you add a small amount of glycinamide to a 3.3 μM solution of potassium hydroxide (a strong base) what percentage will be unprotonated?
I first need to find the ph then i can use the Henderson hasslbach equation
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04/24/17

Heptane is insoluble in water. Explain why water is incapable of dissolving heptane
A. Heptane is a molecular compound rather than an ionic compound. B. Heptane is a nonpolar molecule composed of a long hydrocarbon chain. C. Heptane's long carbon chain gives it a greater dipole... more
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