Posts by Michelle

Total # Posts: 2,038

Chemistry
What is delta H for NaOH(s)+1/4O2(g) yielding 1/2Na2O2(s)+1/2H2O(l) ?

physics
In 2.0 minutes, a ski lift raises 4 skiers at constant speed to a height of 170 m. The average mass of each skier is 65 kg. What is the average power provided by the tension in the cable pulling the lift?

Religions of the world
What events and figures have shaped the development of Islam in the United States?

us history
So far, the only thing I can come up with was that he did it for the good of the country, to keep states united.

us history
I'm doing a mock trial defending Andrew Jackson being impeached. He is being indicted for violating states' rights in his dealings with South Carolina in the nullification crisis. I'm finding it extremely hard to find any info to form reasons to defend him.

UMMMMMM not helping!

chemistry
A 50.00ml sample of 0.200M hydroflouric acid (HF) is titrated with 0.200M NaOH. The Pka of HF is 3.452. a) calculate the pH of the HF solution before titration b) calculate the pH after the addition of 20.00ml of NaOH

chemistry
1) the value of Kb after the decomposition of sulfur trioxide (S03). 2SO3 (g)--2SO2 (g) +O2 (g) is 1.79 x10^-5 at 350 degree celcius. if SO3 initially at 0.200 atm pressure comes to equilibrium in an otherwise empty tank at 350 degree celcius, determine the partial pressure of...

com/170
between four types of of writing summary, analysis, synthesis,and evalution

Physical Science
49 y pr 49.2

Religions of the world
What is the nature of God in Confucianism?

Physics
A proton and an electron have the same kinetic energy upon entering a region of constant magnetic field. What is the ratio of the radii of their circular path?

physics question
A 278-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.870, and the log has an acceleration of 0....

math
Friday.

science
state the chemical reagent that is used to demonstrate that expired air contains carbon dioxide

9th
The electricity costs of a business increased from \$18,000 one year to \$19,000 the next. To the nearest whole percent, what was the rate of increase?

i help on page 31 god

i help on page 31

Phychology
expectation plays an importand role in?

physics
16. How much work is done on a bookshelf being pulled 4.00 m at an angle of 35.0„a from the horizontal? The magnitude of the component of the force that does the work is 87.0 N

physics
a satelitee breaks in half while in circular orbit about the earth

algebra
also I don't know how to figure this out either, 5|x+7|+14=8

algebra
I'm working with absolute values, and for some reason I'm just really stumped by this problem. 7=|3x+9|+7 I don't see how I can get any number that will make the equation equal 7?

College Organic Chemistry
Why are fractionating towers in a refinery always tall?

College Organic Chemistry
Suggest what would be the result if we heated a mixture of dichloromethane and naphthalene to 60 degrees Celcius, collected distillate until no further material distilled, and then cooled the flask back to room temperature.

College Physics
A coil has a horizontal axis. Its current goes North on top. What is the direction of the magnetic field inside this coil?

Thermochemistry
When 1 mol of a gas burns at constant pressure, it produces 2426 J of heat and does 6 kJ of work. What is Delta H, q, and w?

chemistry
Based on the mass of O2 produced can you calculate the gram molecular weight? Chem lab on oxygen production 10g KClO3 reacts with heat to produce 2KCl(s)+3O2.What is the mass produced? 10g/122.6=0.0816 mole of KClO3 0.00816x3moleO2/2moleKClO3=0.1224 moleO2 0.1224 molex32g O2/...

writing
I need to write several sentences describing a interaction with a friend or family member about personal finance or credit cards, using five different pronouns in the sentences. Can you please give me some understanding or examples?

Thermochemistry
A total of 2.00 mol of a compound is allowed to react in a foam coffee cup that contains 167 g of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7 degrees C. What is the enthalpy?

Thermochemistry
It takes 45.0 J to raise the temperature of an 9.70 g piece of unknown metal from 13.0 degrees C to 24.5 degreesC. What is the specific heat for the metal?

Math
1. Look at the two monomials below. 9u3v2w4 15u4v4w3 What is the least common multiple (LCM) of the monomials shown above? 3u3v2w3 45u4v4w4 45u3v2w3 3u4v4w4

DERIVATIVE!!!
9(x-5)^2/3

Math-Calc AB
e^(-x/2) + xe^(-x/2) = 0 solve for x

math
Distribute: 2b-6+5=3b-3 Isolate b: -b=-2 b=2

Thank you Reiny
Thanks I think I somewhat get it-Thanks again for the explanations

Could you check these two problems? 3sqrt (y+2) = 3 is y = 25 Answers were: true or false I said true because I did it like this Square both sides=y + 2 = 3^3 y+2 = 27 y = 25 and sqrt (2y-6) = 3-y for y answes are: no solution 5 3,5 3 I said 3 because I did it like this: 8y -...

Thank you

Hi, I'm totally stuck! Problem: sqrt(x-3) = sqrt (2) -sqrt(x) I know I square them to get them out of square roots but after that I'm stuck- answers: -25/8 25/8 no solution 1/8 Please show me how its done Thank you

Chemistry
A gas mixture contains 1.16 g N2 and 0.89 g O2 in a 1.49 L container at 16 degrees C. What is partial pressure of N2 & O2? *I already know the mole fraction for N2 is 0.60, and 0.40 for O2. I just don't know where to go from here.

Chemistry
Imagine that you have a 5.50 L gas tank and a 3.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 atm, to what pressure should you fill ...

thanks very much

It is true that every author has some bias? I would say true, but then I am not sure if this means in general or if you are able to tell in there writing true or false

false?

Inductive arguments leave no room for doubt as to the truth of their conclusions. true or false

Thank you so much for your help, I was having a hard time with my questions, this site is great. thanks again!

so outlining the content is that meaning the whole paper? I was confused

As a critical reader, before you begin an evaluation you should be able to a)highlight and underline interesting facts. b) outline the content. c)locate the author's conclusion

false

Critical readers would not ask the same questions of themselves that they ask of the writer's work. true or false thanks!

thx!!

Making inferences is an abstract critical thinking skill that involves the active and blended use of several sources of information, including a.)the application of the basiic method of problem solving b)using background knowledge,personal experience, and clues/facts of the ...

math-algebra
I got 422.08 but it says that is still wrong can you help

math-algebra
A launched rocket has an altitude, in meters, given by the polynomial h = vt -4.9t^2, where h is the height, in meters, from which the launch occurs, at velocity v in meters per second, and t is the number of seconds for which the rocket is airborne. If a rocket is launched ...

A price (in dollars) and demand for a product are related by 2x^2-5xp+50p^2=21200 If the price is increasing at a rate of 2 dollars per month when the price is 20 dollars, find the rate of change of the demand. Rate of change of demand =

CALCULUS!!!
A price (in dollars) and demand for a product are related by If the price is increasing at a rate of 2 dollars per month when the price is 20 dollars, find the rate of change of the demand. Rate of change of demand =

bus stats
60% of households have internet, what is the probability that 3 randomly selected households will have internet?

A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to the ground, what is...

physics!!
A skateboarder, starting from rest, rolls down a 14.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.40 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant. (b) If the ramp is inclined at 20.5° with respect to the ground, what is...

write in order from least to greatest the six numbers whose digits are 2, 8, and 9

physics
A block of weight w = 25.0 N sits on a frictionless inclined plane, which makes an angle = 25.0 with respect to the horizontal, as shown in the figure. A force of magnitude F= 10.6 N , applied parallel to the incline, is just sufficient to pull the block up the plane at ...

Physics
yes, he will be able to make it to the other roof.

Medical
Select an accreditation agency and name an area of records management that is affected by its guidelines? How does accreditation affect the practical activities of record management in hospitals?

PHYSIC help!
a cart is pushed uphill on a ramp, goes up and momentarily stops, and then goes back down. predict the position vs. time, velocity vs. time, and the acceleration vs. time for this. IDK how to do this! i tried on the first one. on the graph, i have it looking like an upside-...

social studies
litigants?

what does the constitution define treaty as?

math
The diameters of a wooden dowel produced by a new machine are normally distributed with a mean of 0.55 inches and a standard deviation of 0.01 inches. What percent of the dowels will have a diameter less than 0.57?

childcare
1 A check text book 2. is correct 3. is D 4. is A Everything else looks good

childcare
I would love to help, what is the name of the book. I remember taking this test...

My son is in the first grade and he got this same exact math sheet. Guess our chidlren go to the same school Lol or we all in the same curricullum no mattter the school or teacher they all have the same lesson plan go figure. Well I just let my son write the math problem bout ...

accounting
What is the adjusting entry to this problem on Dec 31st? On October 15, the school agreed to teach a four-month class (beginning immediately) for an individual for \$3,100 tuition per month payable at the end of the class. The services are being provided as agreed, and no ...

math
In a local college, 60% of the math majors are women. Fifteen math majors are chosen at random.

math
mary has 22 ribbons some of the ribbons are first place what expression shows how many of mary ribbons are not for first place

math
The theater group performed on Friday and Saturday night. Three hundred and twenty four attended on Friday, and 33 more attended on Saturday. How many people saw the show?

math
I have been asked to identify the "situation" in a story problem. What does that mean?

Using four different digits, what is the least sun you can get when you add two 2-digit numbers? Write your problem.

Calculus
f(x)= x^3; f(x)= (x+DELTAx)-f(x)/ x^3

Cultural Diversity
What are the linguistics of Puerto Rican Americans

Cultural Diversity
What does familial conventions or statuses mean? Thank You

Environmental Science
What is a few terrestrial resource issues? I have to pick one to do a powerpoint and I need some ideas. Thank You

com155
In the passage below bold the adverbs and underline the adjectives. NYPD Detectives Christopher Danson and P.K. Highsmith (Dwayne Johnson and Samuel L. Jackson) are the baddest and most beloved cops in New York City. They don’t get tattoos – other men get tattoos of ...

Environmental Science
what are the health and environmental effects of sulfuric acid (H2SO4)?

Environmental Science
What are the sources of sulfuric acid (H2SO4)?

Cultural Diversity
what are two to three characteristics of Orientalism? How may Orientalism and prejudice contribute to hate crimes against Muslim and Arabic groups?

math Help
(-infinity, -2), (-2,0), (0,2), and (2, infinity)

Chemistry
What concentration of aqueous CaCl2 solution freezes at -10.2ºC? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m. A. 5.48 m B. 11.0 m C. 1.83 m D. 6.12 m E. 2.74 m

Cultural Diversity
What years did Sojourner Truth help free slaves and become visible in the fight against slavery through her speeches and publications?

Cultural Diversity
what year did Harriet Tubman help develope the Underground RailRoad?

Algebra
-2x+y+3z=7 x+2y+z=4 2x-3y-2z=-10 How do you solve this?

statistics
The ages of students at a university are normally distributed with a mean of 21. What percentage of the student body is at least 21 years old?

Cultural Diversity
Through out history have the Colonized English been effected by any of the following forms of discrimination, or did they participate in any of the following forms of discrimination? Dual labor market, environmental justice issues, affirmative action, redlining, double ...

Cultural Diversity
What does "glass ceiling, glass walls, or glass escalator mean"?

Algebra
Commuting students. At a well-known university, 1/4 of the undergraduate students commute, and 1/3 of the graduate students commute. One-tenth of the undergraduate students drive more than 40 miles daily, and 1/6 of the graduate students drive more than 40 miles daily. If ...

reimbursement methods
what formula do i follow for reimbursement the hospital receives from medicare

college chemistry
When solutions of AgNO3 and NaOH react, the balanced molecular equation is 2AgNO3(aq) + 2NaOH(aq) Ag2O(s) + 2NaNO3(aq) + H2O(l) How much Ag2O is produced when 0.200 g of AgNO3 and 0.200 g of NaOH react?

math
rewrite the statement using percent notation out of every100 eligible people 87 voted in a recent election

math
2/3/10=1.8/r

Algebra
Volume of a container? A cubic shipping container had a volume of a^3 cubic meters. The height was decreased by a whole number of meters and the width was increased by a whole number of meters so that the volume of the container is now a^3+2a^2  3a cubic meters. By how ...