Friday
April 18, 2014

Posts by Jessica


Total # Posts: 2,569

math
Nancy made the following statement: The range of f(x) = ax + b is the set of all real numbers given that a and b are real numbers. Which produces a counter example to her statement? b = 0 a = 0 b < 0 a < 0 i think its a=0 please help

chemistry
consider the following reaction at 298K 4Al(s)+3O2(g) yields 2Al2O3(s) delta H= -3351.4 Kj find delta S sys find delta S surr find delta S unvi

Chemistry
A student ran the following reaction in the laboratory at 650 K: H2(g) + I2(g) 2 HI(g) When she introduced 0.204 moles of H2(g) and 0.229 moles of I2(g) into a 1.00 Liter container, she found the equilibrium concentration of I2(g) to be 5.77E-2 M. Calculate the equilibrium con...

Chemistry
A student ran the following reaction in the laboratory at 327 K: CH4(g) + CCl4(g) 2 CH2Cl2(g) When she introduced 4.07E-2 moles of CH4(g) and 7.57E-2 moles of CCl4(g) into a 1.00 Liter container, she found the equilibrium concentration of CH2Cl2(g) to be 1.21E-2 M. Calculate t...

Chemistry
A student ran the following reaction in the laboratory at 651 K: 2 NH3(g) N2(g) + 3 H2(g) When she introduced 8.75E-2 moles of NH3(g) into a 1.00 Liter container, she found the equilibrium concentration of H2(g) to be 0.119 M. Calculate the equilibrium constant, Kc, she obtain...

Physics
A rifle shoots 50.0 gram bullet with a muzzle a velocity of 350 m/s. How fast would a 80.0 kg person have to run in order to have the same amount of kinetic energy as the bullet in flight? If the bullet is shot vertically, what is the the maximum height about the gun barrel re...

Physics
A 1000 kg car is going 8.90 m/s has a minimum braking distance of 6.0 meters. Find the average braking force exerted on the car during the stopping process.

english-project
Hi!I am doing project, its about making the world a better place for humans. I have to join organizations online and subscribe t email lists to get action updates-issues like anti-war/peace, social justice and environments, animals, food water and democracy. Please tell me exa...

chemistry
MASS (GRAMS) Nac1- 0.9992 C12H22O11- 0.9822 NH4C1- 0.9510 C6H5OH- 0.9723 C9H20- 1.0038 *Find the Molar Mass (g/mol) for each * *Find the Moles of each element for each * *Find the Atoms of each element for each * - if possible show work and or equation set up to find answers

Psychology
Please Help

Psychology
Which of the following variables are independent and dependent? 1. Personality and Gender 2. Happiness 3. Scores

Math/Infinity
Explain why the union of two countably infinite sets with nothing in common is also countably infinite. I said that it was because the two sets are in one-to-one correspondence with each other. Is this right?

Thomas Nelson
Check out definr (dot) com just type in chromatin and see what comes up

english
What literary work is this from? You will need to post the lines in order for people to understand your question.

physics
A projectile launched straight upward at 141 m/s. How fast is it moving at the top of its trajectory? Suppose it is launched upward at 45° above the horizontal plane. How fast is it moving at the top of its curved trajectory?

Math/Infinity
Split the natural numbers into three sets A, B, and C so that the sets have nothing in common, they each are countably infinite, and A U B U C = the set of natural numbers. So here's what I got A: 2,4,6,8,10... B:1,3,5,7,9... C: ? I don't know what to do for C because ...

Chemistry
When the stopper of the Erlenmeyer flask is loosened before weighing, why doesn't the carbon dioxide escape? Why isn't the mass of air displaced by the water taken into account when the the mass of water is determined?

program planning
Please respond to the following questions either by writing the design name or by describing the design using standard notation (X= program, O=Observation, R=random assignment. For each design, please discuss all threats to internal validity. 1. Design: Single group post-test ...

Science
Trini adds 10g of baking soda to 100g of vinegar. The mixture begins to bubble. When the bubbling stops, trini finds the mass of the resulting mixture. She determines its mass is 105g. Why has the mass changed? A. A gas has formed and left the mixture B. Vinegar evaporated dur...

Math (Algebra 1)
use the cylinder formula and 3.14 time 4 times 4 times 6 then the answer to that is the answer to your problem

Science
I think it is A

Science
Which of the following is an example of how economics can affect science? A. Limited funding may lead scientists to research one topic instead of another. B. Legislators may create new laws about the use of natural resources based on the recommendations of scientists. C. A hea...

history
I haven't found anything besides how women went into the armed forces and helped the country.

history
how is America's involvement in WW2 relevant to today?

Dividing by1- Digit Divisors
How can you tell before you divide 387 by 4 that the first digit of the quotient is in the tens place?

(History)
What specific challenges did the South Vietnamese face as they tried to flee Vietnam in 1975?

Math
I thought Huong had to spend $3.42 because I multiplied $.03x9 and got $.27 and then I multiplied $.03x3 and got $.09. I also multiplied $.03x7 and got $.21, then I added them and got $.57. Finally I multiplied $.57x6 (by the number of sides of the box) and got $3.42. However,...

Reading
64.8% Of students went to the football game are the other half was busy . Can you multiply to get the answer

Math
4600

geography
i learned that mexico city was founded by a group of aztecs.

geography
this doesn't really answer my question...

geography
what does mexico's city site on top of the aztec city suggest about the location?

Geography (Ms. Sue)
These countries are located in the western part of the continent.

Health
What is intensity?

chemistry
What is the major difference between the two-dimensional and three- dimensional models of ethane and methane? When might you choose to use a two-dimensional model rather than a three-dimensional model when representing one of the molecules?

Finance
You take out a 30 year $100000 mortgage loan with an apr of 6% and monthly payments. In 12 years you decide to sell your house and pay off the mortgage. What is the principle balance on the loan?

social studies
in 1777 who commanded the American soldiers who captured 5,800 british soldiers under general burguyne at Saratoga?

chemistry
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 4.00-g sample is burned, and 3.30 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?

Math
The population of New York doubles during the workday. At the end of the workday, the population decreases by half. If the population in New York City is roughly 4,000,000 people before rush hour, and the morning rush hour lasts 3 hours, what would be the population if the rus...

business math
You are the buyer for the shoe outlet. You are looking for a livie of mes shoes to retail for $49.95 if your objective is a 55% markup based on selling price, what is th most that you can pay for the shoes and still get the desired markup?

business math
Carousel Toys has ramper buckaroo wooden rocking horse for toodlers on a 30% markdown sale for 72.09 each what was the original price before they were markdown?

business math
The flour power bakery makes 200 cherry cheese cakes at a cost of 2.45 each. If a spoilage rate of 5% is anticipated at what price should the cakes be sold to achieve a 40% markup based on cost?

business math
Epicure market prpares fresh gourmet entrees each day. On wednesday, 80 baked chicken dinner were made at a cost of 3.50 each

business math
Whawas the orginal selling price of a trendmill curently on sale for 2,484 after a 25% markdown?

BUSINESS MATH
You are shopping for an executive desk chair at the furniture Gallery. You see two you like on sale Chair A was originally $119.99 now on sale for $ 79.99 and chairB

Business Math
Bloomingdales purchases imported perfume for $24.30 per ounce. If the store policy's to mark up all merchadise in that department 39% based on selling price, what is the retail selling price of the perfume?

business math
What is the percent markup based on selling price for the Western Wear shirts?

business math
Wyatt's western wear purchases shirts for $49.50 each. A $34.00 markup is added to the shirt. What is the selling price?

math
jim paddle from one shore of a lake three miles wide at 4 mph, and john paddles from the opposite shore at 5 mph. how long will they travel before they meet?

advance icd-9
This 35-year-old female patient has carcinoma of the upper-outer left breast. She had a lumpectomy performed and a sentinel lymph node biopsy of the axillary lymph node. The pathology report for the lymph node states no pathological change.

Science
what is a device that does work in a electrical current? A. load B. turbine C. charge D. Magnet

business math
Arturo Muina is the captain o a charter fishing boat. He is paid a salary of $140 per day. He also averages tips amounting to 12% of a $475 daily charter rate. Last month during a fishing tournament, Arturo worked 22 days. What wre his total gross earnings for the month?

business math
Spencer Morris works in the telemarketing division for a company that pays a salary of $735 per month plus a commission of 3 1/2 of all sales greater than $15,500. If he sold $4,900 last month, what was his total gross pay?

business math
Foremost fish market pays a straight commission of 18% on gross sales, divided equally among the three employees working the counter. If foremost sole $22,350 in seafood last week, how much was each counter employee's total gross pay from this?

math
Mitch Anderson is a security guard. He earns $7.45 per hour for regular time up to 40 hours time and a half for overtime and double time f or the midnight shift. If mitch worked 56 hours last week, including 4 hours on the midnight shift, how much were his gross earnings?

Math
I'm pretty sure it goes something like: 3/5 = 3➗5 (sorry if that's a box, it's supposed to be a division sign) = 0.6 50*0.6= 30 5th grade students ________________________________________ Another way to think about it is if the denominator is the same as the...

Math
Thanks so much!!!!!! That was the only problem I had trouble on.

Math
This is Translating Problems into Equations: (a) Ms. Dixon had a 25ft ribbon that was cut into two peices. (b) One piece is 6ft longer than the other. Ms. Dixon --> Ribbon/Pieces --> Equation -->

6th grade math
They are all correct great job for not getting LCM and GCF mixed up! I used to get them mixed up all the time when I was in 6th grade.

Math
I'm not sure so maybe the numbers on the question are wrong but thanks for the help anyway.

Math
Nia and Trey both had a sore throat so their mom told them o gargle with warm salt water. -Nia mixed 12 teaspoon salt with 3 cups of water. -Trey mixed 12 teaspoons salt with 112 cups of water. Nia tasted Trey's salt water.She said," I added more salt so I expected th...

physics
a car travels 40 miles at an average speed of 80 mph and then travels 40 miles at an average speed of 40 mph. The average speed of the car for this 80 mile trip is: A) 80 mph B) 72.5 mph C) 60 mph D) 53.3 mph E) 40 mph

physics
which of the following situations are impossible : A) velocity negative, acceleration positive B) velocity positive , acceleration negative C) velocity increasing, acceleration negative D) velocity decreasing , acceleration zero E) velocity negative , acceleration negative

College chemistry math ratio problem
Earlier you determined that the proper ratio of packages of buns, packages of patties, and jars of pickles is 3:2:4. If you want to feed at least 540 people, but also maintain the proper ratio, what minimum number of packages of buns, packages of patties, and jars of pickles d...

science
wildlife

business math
Castle Mountain furniture sells desks for $346.00. If the desk cost $216.66, what is the amount of the markup?

business math
The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1390 will be returned because they are damaaged. The terms of sales are 2/10, n30 ROG. The shipment arrives on May 26 and Empire ...

Business Math
Nature Garden Center buys lawn mowers that list for 679.95 less a 30% trade discount. What is the dollar amount of the trade discount?

History
What were the differences in kingship between France and England in the thirteenth century?

math
if there are 28 students in a class and there are 13 girls, what percentage of the class is girls?

Chemistry
Can you explain why?

Chemistry
The phrase “the heat absorbed or released by a system undergoing a physical or chemical change at constant pressure” is a. the change in enthalpy of the system. b. the change in internal energy of the system. c. the definition of a state function. d. the temperature ...

Chemistry
If 25.0 mLs of 0.150M nitric acid was used, how many grams of barium carbonate would be required for complete reaction?

Chemistry
Which of the following statements is incorrect concerning the thermochemical equation below? 2SO3(g)  2SO2(g) + O2(g); H° = 198 kJ a. The enthalpy of the reactants exceeds that of the products. b. The reaction is endothermic. c. For the reaction 2SO2(g) + O...

Chemistry
If 0.5000grams of barium carbonate was reacted with 25.0mLs of 0.15M nitric acid and the gas then collected in 100mL flask at 77°C, what is the gas pressure in the flask?

Chemistry
Calculate the change in enthalpy when 52.0 g of solid chromium at 25°C and 1 atm pressure is oxidized. (H°f for Cr2O3(s) is –1135 kJ/mol.) 4Cr(s) + 3O2(g)  2Cr2O3(s) a. –1135 kJ b. –284 kJ c. –568 kJ d. +1135 kJ e. +568 kJ

physics
A man is standing on a platform that is connected to a pulley arrangement, as the drawing shows. By pulling upward on the rope with a force the man can raise the platform and himself. The total mass of the man plus the platform is 94.7 kg. What pulling force should the man app...

Chemistry
Two 20.0-g ice cubes at –20.0 °C are placed into 295 g of water at 25.0 °C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts. Heat capacity of H2O(s)=37.7J Heat capacity of H2O(l)=7...

Math
Which of the following classes has the largest ratio of boys to girls?

Chemistry
What is the change in enthalpy when 4.00 mol of sulfer trixoide decomposes to sulfer dioxide and oxygen gas? 2SO2 + O2 ---> 2SO3 delta H = 198kJ

Chemistry
What is the heat of combustion of ethane, C2H6, in kilojoules per mole of ethane?

Chemistry
Determine the enthalpy of the following reaction. 2M(s) + 3Cl2(g) ---> 2MCl3(s)

Chemistry
At constant volume, the heat of combustion of a particular compound is –3547.0 kJ/mol. When 1.239 g of this compound (molar mass = 196.58 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 8.539 °C. What is the...

Chemistry
Cr2O72-(aq) + I-(aq) -->Cr3+(aq) + IO3-(aq) What is the oxidizing species and the reducing species?

Chemistry
Using your 0.0100M oxalate solution and only the equipment and supplies listed below, describe how to prepare a 0.00025M solution of oxalate. Note, you are not allowed to add volumes with pipettes. (example, if you want 20mLs, you can not use a 10mL + 10mL addition as this add...

Chemistry
How many milliliters of 2.00 M HCl(aq) are required to react with 7.55 g of an ore containing 36.0% Zn(s) by mass?

Chemistry
Describe how to prepare a 0.0100M Solution of oxalate using solid sodium oxalate and a 500mL volumetric flask and water.

Chemistry
0.125g of sodium dichromate is to be reacted wtih 0.025M potassium iodide. How many mLs of the potassium iodide solution will be needed.

chemistry
200 ml of oxygen is collected over water at 18 degree Celsius and standard pressure, what will the volume of the dry oxygen be at STP?

Intermediate Algebra 137
Can't figure out equation x/2+x/3=3/4 can you help me step by step.

Chemistry
A 3.000gram sample of a hydrate compound containing Co, C2O4, and H2O was combusted to give 1.316g of Co3O4. What is the percentage of Cobalt in the original sample?

algebra
how do I solve this and show the work: a motorboat went upstream at 15 miles per hour and returned downstream at 20 miles per hour. How far did the boat travel one way if the round trip took 3.5 hours?

English
For homework I have to answer the following questions regarding Puerto Rican obituary by Pedro pietri but I am horrible at interpreting poems if someone can please help thank you "Puerto Rican Obituary", by Pedro Pietri: What has the American dream turned for the Pue...

Stats
The census figures show that the average income for a family in a rural region is approximately $34,860 per year. A random sample has a mean income of $33,566 per year, with a standard deviation of $1,245. At a sig. level of .0.01 is there enough evidence to reject the claim? ...

Spanish 2
Thanks!! This really helps me!!

Spanish 2
Thanks!

Spanish 2
All the verbs that have not been conjugated need to be either in preterite or imperfect form. My spanish teacher hasnt really explained it that well and I am confused on how to know whether its imperfect or preterite.Now we have a test on it tomorrow. Can someone please help m...

college agebra
(3xsquared-2x-1)(xsquared+x+5)

Trigonometry
I need help proving trigonometric identities. Most of my difficulty lies in actually factoring the equation. For example, one of the problems is (cos t - sin t)^2 + (cos t + sin t)^2 = 2. I have to prove that the left side is equal to 2. How do I do that?

rivera middle school
pablo made bread and muffins. he used 3/4 cups of flower for bread and 5/8 cups of flower for muffins. how much flower did he use in all.

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