Questions Asked on
July 19, 2014

chemistry
1. Calculate the standard enthalpy change for the reaction: C2H4(g) + H2(g) → C2H6(g) given that the enthalpy of combustion for the reactants and products are: ΔHºc(C2H4)(g) = 1411 kJ mol^1 ΔHºc(C2H6)(g) = 1560 kJ mol^1 ΔHºc(H2)(g) = 286 kJ
asked by John 
History
In Uncle Tom's Cabin, (the book) did blacks have a racial caste system? Please explain
asked by Natalie 
Coding
Anesthesia services for closed treatment of fracture of humerus; patient is 85 years old, but healthy. Provide the code(s) and the physical status modifier.
asked by Rikima 
math
5. The sum of 7 unequal positive integers is 61. What is the largest possible value that any of those integers can have? A.55 B.40 C.39 D.13 E.9 please show work
asked by Johnny 
Psychology
analyze the function of emotions as motive.
asked by Mandy 
math
The sum of the first n odd number is n^2. The sum of the first 30 odd numbers is A. 60 B. 90 C. 300 D. 900 Thank you for the help in advance =)
asked by Jena 
math
Rico works for a landscaping company. He will enclose a square garden, using a full 50 ft roll of wire fencing. What could the largest dimension of the garden be? Sketch and label the garden, then calculate perimeter to verify your answer.
asked by Johnny 
chemistry
2. Calculate the enthalpy change of combustion for ethene gas (C2H4) given the following enthalpy changes of formation: ΔHºf(C2H4)(g) = +52 kJ mol^1 ΔHºf(CO2)(g) = 394 kJ mol^1 ΔHºf(H2O)(g) = 286 kJ mol^1
asked by John 
chemistry
4. Calculate the Gibbs’ free energy change for the reaction Mg(s) + H2O(g) → MgO(s) + H2(g) carried out at 100ºC given the data below. Under these conditions is this reaction product favoured? ΔHºformation (kJ mol^1) MgO(g) 602 H2O(g) 242 H2(g) 0
asked by John 
chemistry
Which of the following is the ph of a solution in which concentration of hydrogen ion is greater than hydroxide ion. 0ptions:12,9,7 or 3
asked by kody 
Principle of Marketing
Requirement 3: Television or Radio Advertisement (20 Points) For this requirement, each team will create a storyboard or script for a television or radio advertisement. An average radio or television ad is about 30 seconds, so have that in mind. You can
asked by Kiara 
American literature
1. Reread the final paragraph of the speech of Pontiac (page 445) and the closing lines of Logan’s message, as set down by Jefferson (page 450). Between oral discourse and written discourse, what are the crucial differences in reaching and holding the
asked by Kiara 
American literature
3. Red Jacket and Tecumseh in their respective speeches (again, as translated and transcribed), make frequent reference to “brothers” and brotherhood. Why such emphasis, at that historical moment, upon fraternity and unity? Read Native Americans:
asked by Kiara 
Chemistry
I have previously posted this question, but now I am lost question: A calorimeter is filled with 10.0 millimole (mmole) of methane gas and an excess of oxygen. When burned, the ignition wire releases 107.2 J of heat. The heat capacity of the calorimeter
asked by Liz 
Macroeconomics
Suppose the demand curve is given by Q=20020p. What is the price elasticity at P=$4? is demand elastic or inelastic at this point?
asked by Yvette 
Sociology
In the U.S., which social class has benefitted the most from the tax breaks?
asked by Katrina 
math
Evaluate: 4^8 + 4^8 + 4^8 + 4^8 + 4^8 + 4^8 + 4^8 + 4^8
asked by peter 
English
1. Today, millions of people have one form of religion, and their neighbors a different one. 2. Today, millions of people have one form of religion, and their neighbors a different religion. 3. Today, millions of people have one form of religion, and their
asked by rfvv 
English
They have learned to live in peace in the same state.  What does 'state' mean in the sentence? Does 'state' mean 'country' or 'one of the States' in the USA?
asked by rfvv 
English
1. They realize that a different religion is something to talk about, not to fight about.  What is the full form of #1? 2. They realize that a different religion is something to talk about, and it is not something to fight about. 3. They
asked by rfvv 
Algebra
Which set of population data is the least dispersed from its mean? 2, 3, 2, 9 4, 0, 4, 0 6, 2, 2, 2 9, 3, 5, 3
asked by Junior 
Maths
A painter uses a trestle to stand on in order to paint a ceiling. It consists of 2 stepladders connected by a 4 metre long plank.The inner feet of the 2 stepladders are 3 metre apart, and each ladder has slopping sides of 2.5 metres. How high of the ground
asked by Ravneet 
Math
Shelly delivers the weekly local paper to neighborhoods in her town. House numbers are even on one side of the street and odd on the other. Shelly delivers an equal number of papers to both sides of the street. Although she always aims for the front
asked by Elizabeth 
Dynamics
The propellers of a ship of weight W can produce a propulsive force F0; they produce a force of the same magnitude but of opposite direction when the engines are reversed. Knowing that the ship was proceeding forward at its maximum speed v0 when the
asked by Dynamics Problems 
help
If you could design a study on anything about human behavior to show how it is the same across cultures, what would that be?
asked by april 
statistics
Suppose a study is done in which several random samples of people from a population are taken and polled on the number of hours per night they sleep. It is determined that the sample proportion for those who sleep at least 8 hours a night is 36%, and the
asked by frank 
chemistry step by step for me. Thank a lot
342gm of 20% by mass of ba(oh)2 solution sq gr .57 is reacted with 1200ml of 2m hn03. if the find density is same as pure water then molarity of the ion in resulting solution by nature of the above solution is dentified. The answer 0.888M Who helps me to
asked by Ken 
maths
In a purse for every 8 notes of 10/ it should have 5 notes of 5/. For every 8 notes of 5/ it should have 3 notes of 1/. If value of 5 notes =200 then what is the total amount in the purse?
asked by nisha 
science
does density affect weight?
asked by sara 
finance
What is the payback period of the following project? Initial Investment: $50,000 Projected life: 8 years Net cash flows each year: $10,000
asked by jill 
Chemistry
The pH of an acid solution is 5.90. Calculate the Ka for the monoprotic acid. The initial acid concentration is 0.10 M. What I have done: pH = 5.9 a = 10^5.9 = 1.2589 * 10^6 Ka = [H+][A]/[HA] Ka = (1.2589*10^6)^2/(.011.2589) I got 1.26903013E12, but
asked by Wren 
PHI 208
Hill refers to the ability to understand oneself, to face oneself, and to be honest about the kind of creature one is by this term
asked by ANDREW 
Dynamics
A particle is attached to point O from A by the force F=k/x3. If x=x0 and v=0 when t=0, determine velocity and acceleration as a function of x, and the time it takes to travel from A to O.
asked by Dynamics Problems 
chemistry
3. Calculate the standard entropy change for the reaction: N2 + 3H2 → 2NH3 given the standard entropies Sº(N2)(g) = 191.6 J K^1 mol^1 Sº(H2)(g) = 130.6 J K^1 mol^1 Sº(NH3)(g) = 193.3 J K^1 mol^1
asked by John 
math
find the montly payment needed to amortize principal and interest for a 130000 fixed rate mortgage with a 10.5% rate and a 30 year term
asked by kuku 
Algebra
The weights of boxes of candies produced in a factory are normally distributed with a mean weight of 16 oz and a standard deviation of 1 oz. What is the weight of a box of candies with a zscore of 2? 16 oz 18 oz 20 oz 22 oz
asked by Junior 
Algebra
combine the like terms 9x  13x = 12x
asked by sharon 
Math
In the tradition of their Native American ancestors, Decorah Custom Canoes specializes in creating handcrafted canoes using the finest natural materials. Whether they are from birch bark or cedar, all canoes are custombuilt from native wood. Each piece is
asked by Peg 
History
Why should Uncle Toms Cabin be a part of the US History curriculum? Please explain!
asked by Natalie 
stats
what is the probability that a 6 digit phone number contains at least one 8?
asked by michelle 
Algebra
identify the terms in each expression 4  3 + 2xy
asked by sharon 
English
Can anyone tell me where I can find an example of verbal irony in 'Don Quixote' chapter 8. I've reread the passage several times and just can not pinpoint it. The closest example I can find to irony in that passage is "with it I propose to do such
asked by Eri 
statistics
Construct a 95% prediction interval for the number of hours of sleep for an adult who is 45 years old
asked by Terry 
momentum
322n
asked by Anonymous 
Physics
If mass A is 1.0 kg, mass B is 5.0 kg, and the frictionless pulley has a mass of 0.5 kg and a radius of 0.15 m, what is the velocity of A and B at 0.5 seconds?
asked by Rye 
Grammar
was incarnate or was incarnated
asked by Anonymous 
Accounting
If the net income is $50000, and the cost of goods sold is $450000. the company's gross profit rate is 40% what are the net sales??
asked by Bree