Thursday

July 31, 2014

July 31, 2014

Total # Posts: 108

**Chem **

For a particular reaction H = -32 kJ and S = -98 J/K. a.At what temp will the reaction be at equilibrium? b.If the temperature is increased from the equilibrium temperature what will happen?

**Statistics**

A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number who exercise regularl...

**math**

.15

**Trigonometry**

An observer (0) spots a plane flying at a 55 degree angle to his horizontal line of sight.If the plane is flying at an altitude of 21,000 ft., what is the distance (x) from the plane (P) to the observer (0)

**math**

a jar contains 26 fluid ounces of spaguetti sauce. How many cups of spaguetti sauce do 4 jars contain?

**Math**

(4k+5)(k+1)=0

**Math**

My answer, that I got, was 225.

**Chemistry**

How many grams of NaCl are present in a 300 grams salt solution containing 9% NaCl ?

**algebra**

Beatriz is creating graphs for her city’s Parks Department. Beatriz is trying to persuade the Parks Department to put in more gazebos for shade. For a local park, Beatriz wants to demonstrate the attendance as it changes every week. She also wants to show the temperature ...

**physics**

The amount of energy needed to power a 0.10-kW bulb for one minute would be just sufficient to lift a 1.0-kg object through a vertical distance of

**chemistry**

N2(g) + 3H2(g) → 2NH3(g)+ 22,000 cal equals how much ΔH

**Calculus**

Find constants a and b in the function f(x)=axe^(bx)such that f(1/7)=1 and the function has a local maximum at x=1/7. a = b =

**Science**

The rms(root-mean-square) value of a periodic signal s(t) is defined to be rms [s]=(1/T Ss^2t dt)^1/2 where T is defined to be the signal's period: the smallest positive number such that s(t)=s(t+T). What is the rms value of the sinusoid s(t)=Asin(2πf0t)? (Again, writ...

**Science**

What is the period of the sinusoid s(t)=Asin(2πf0t)

**College Algebra**

I am using Hawkes Learning System (8.7 Nonlinear Systems of Equations)and my problem is x^2+y^2=13 and y+7=x^2. The answers I came up with are 2 square root of 3 and 3 for my x's. And I received (5,-4) as the y-coordinates. Is this correct?

**social studies**

why did the gap between the rich and poor weaken the shang

**7th grade math help asap plz**

i'm in the 6th grade and i know the answere to that!!

**Math**

which fractions are less than 5/6? 2/5 1/12 25/40 10/20 8/9 how do i know which is greater or less?

**Math**

which fractions are less than 5/6? 2/5 1/12 25/40 10/20 8/9 how do i know which is greater or less?

**literature **

What does the poet find ironic about her situation? In the poem In memory of M.B by Anna Akhmatova.

**Geometry**

Two straight lengths of wire are placed on the ground, forming vertical angles. If the measure of one of the angles formed is 72°, what are the measures of the other three angles? Explain your answer

**Physics**

A car starts from rest and travels for 7.0 s with a uniform acceleration of +2.1 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s2. If the brakes are applied for 1.0 s, determine each of the following. 12.6 m/s at braking period. How far has...

**math**

62 more than the quotient of 18 and 3

**chemistry**

Describe in detail, the steps a student needs to carry out to accurately obtain a 500 ml solution of .100 M HNO3 from a solution of 1M HNO3

**physics - help !!!!!!!!**

The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above. Thank you

**government**

C New judge is appointed

**physics**

The National Transportation Safety Board is testing the crashworthiness of a new car. The 1.87 103 kg vehicle, moving at 11.3 m/s, is allowed to collide with a bridge abutment, being brought to rest in a time of 0.463 s. What force, assumed constant, acted on the car during im...

**chemistry**

What is the volume of CO2 at 25 degrees C and 1.3atm if 10.0g of Cburns at STP?

**Science**

The rest stops the driver made are included in the calculations because that is hoe the problem is defined. However, suppose the bus driver's manager wants to know the average speed at which the driver was actually driving the bus that day while he was on the road. In this...

**punctuation and grammer**

My garden is full of water,because of yesterday's rain. Is this correct?

**Anatomy**

what is the white matter tracts in the ventral portion of the midbrain?

**Math**

Thank you I understand know

**Math**

Write the word form of the number that is 10,000,000 greater than 6,021,849.

**Reading **

Thank you so much I clearly understand now

**Reading **

Mary Olivers poem the journey explain the decision that the "you" in the poem made, and whether or not you think it was the right decision. I don't understand what their trying to say

**Math**

B.it has 4 right angles

**economics**

why was the federal reserve established ?

**Language Arts**

Pronuniation

**11th grade**

I need help interpreting a quote...." in this world goodness is destined to be defeated ".

**Performing and Visual Arts**

Why do humans create and perform?

**U.s Gov**

The fourth amendment was written in part to ensure the government did not allow ?

**math**

Help me with this please. I need statements and resons.

**math**

Given: line nm is congruent to qr; angle m and angle r are right angles; line mp is congruent to ro. Prove: triangle nmo is congruent to triangle qrp and angle n is congruent to angle q

**math**

inverse of y=-√(9-x^2 )

**math**

Find the inverse for graphing y=f(x)=3^-x

**English 101**

b,a,b,b,a,c,a,b,c,a,a,b

**math**

(x-1)(x+5) for x^2+4x-5

**Chemistry**

A popular brand of automobile radiator antifreeze advertises that their product (ethylene glycol; C2H6O2) provides engine protection from temperatures of -64C to 135C when mixed with water in a 50%/50% mix. What is the boiling point elevation and freezing point depression prov...

**answer please!!!!! Math**

I'm having trouble with these 2 problems. (-7+p)(8+p) & (p-7)(p+8)

**math, answer please!**

I don't understand how you do these 2 problems. (p-7)(p+8) & (-7+p)(8+p)

**help please, math.**

(-7+p)(8+p) I don't understand this at all.

**Math**

(p-7)(p+8)

**Language**

friendliness, candied or candies, handiness, envied or envies it may help to use a dictionary if you are unsure of a word. They provide suffixes. :)

**Latin prefix**

don

**Biology**

What is the process of cellular respiration and why is it so important? Thank you.

**Biology**

What is the process of cellular respiration and why is it so important? Thank you.

**Chemistry --really need help!**

nevermind i think I get it now... thanks for your help

**Chemistry --really need help!**

Can you explain why (3*.3*.05) for H2 is subtracted from .2?

**Chemistry --really need help!**

I am really struggling with these problems!! A reaction mixture that consisted of 0.20 mol N2 and 0.20 mol H2 was introduced into a 25.0 L reactor and heated. At equilibrium, 5.0% of the nitrogen gas has reacted. What is the value of the equilibrium constant Kc for the reactio...

**Chemistry**

The initial pressure of BrCl(g) in a reaction vessel is 1.6 mbar. If the vessel is heated to 500 K, what is the equilibrium composition of the mixture? See this table for data on the reaction. P Br2 ? mbar PCl2 ? mbar P BrCl ? mbar

**Chemistry**

This might seem silly but in the rxn O^2- + H2O --> 2OH-, can OH- behave as both the conjugate acid and the base?? Or is it one or the other?

**Chemistry **

Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules were added to the ...

**Chemistry **

But if I cross multiply wouldnt it be .309/100 Torr since the pressure was 100 Torr when moles were .309. Once I solve for n, that is the amount of solute of Benzen--but I need the amount of solute molecules added. So to find that would I just find the difference in the moles ...

**Chemistry **

Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules were added to the...

**Chemistry **

That is what I tried using...I solved for m for when P= 100 Torr, then used that to set up an equation when P=60 Torr to find the difference, but my answer is consistently incorrect. I am setting up the algebra incorrectly but am not sure what I am missing

**Chemistry **

Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules were added to the ...

**Math**

Factor completely. Always begin by factoring the GCF. ax(squared)p-8pa-2axp

**science**

what isthe sun main thing on earth

**5th grade math**

what is the greatest common factor of this number pair? 24,28 -the answer is 4 what is the least common multiple of this number pair? 27,36 -the answer is 3

**biology**

hey does prokaryotes cells have cell walls

**biology**

and the cell is the most basic unit of life

**biology**

yes the cell theroy states the all liveing things contain cells a cell comes from another living cell and hold snd ill get back to you

**biology **

but also what puts it back to the amosphere

**biology**

what removes crbon from the amosphere

**biology**

what substance enters the food chain through photosynthessis

**biology**

sorry but what is the sequece of cellular respiration what you gave me is right just not what i needed

**history**

may i ask what grde are you in and i may be able to help you

**9th grade**

what is the cellular respiration formula

**colloids example**

what are the examples of suspension

**Health Care**

especially if you have braces on

**Health Care**

how do you use baking soda and salt to whiten your teeth. if you can then please do list some directions, thanks

**Health Care**

is dazzlewhite a good thing to use to whiten your teeth?

**English**

I love this poem, I couldn't have done better myself

**Math**

mathmate you are a really smart person

**english 8**

how am i supposed to know

**english 8**

I need a metaphor for Happiness, I can't think of one. please help;-)

**english 8**

could someone give me a metaphor which descrbes happiness

**english/poetry**

thanx

**english/poetry**

What poet/songwriter wrote these words? Like a bird on the wire Like a drunk in a midnight choir I have tried in my way to be free Like a worm on a hook Like a knight from some old-fashioned book I have saved all my ribbons for thee If I have been unkind I hope that you can ju...

**Science**

What is a cell wall or cell membrane?

**2nd grade math**

Danielle has 18 marbles. All the marbles are either black or gold. There are 4 more gold marbles than black. How many black marbles are there.

**8th grade physical sience**

Well obviously if you are referring to the carbonate ion its ionic compound is CO3^2- so it would be gaining two electrons in the outermost shell. Therefore making the overall charge of negative two.

**MATH**

I AM A NUMBER. ROUNDING TO THE NEAREST THOUSAND MAKES ME 1,000. ALL MY DIGITS ARE EVEN, THEIR SUM IS 12, THEY ARE IN ORDER FROM GREATEST TO LEAST, AND NO DIGIT IS REPEATED. WHAT NUMBER AM I?

**S.S 8 grade**

Why do you think King George III refused to consider the colonist' Declaration of Rights?

**Algabra**

What is 3 x -2=

**social studies**

Name the middle colonies. Where were they located

**Geometry**

Which statement is true? Select one of the options below as your answer: A. Two angles can be complementary and equal. B. Two angles cannot be equal if they are complementary. C. An angle can be complementary only if it is 90°. D. Only three angles can be supplementary.

**American History**

so, go back to the actual question,how did isolationist beliefs affect immigration policy during 1920s? Please give me some ideas!THANKS!

**American History**

How did isolationist beliefs affect immigration policy during 1920s? Is nativism similar to isolationism? I only know how the nativist sentiment affected the immigration policy, but I don't know about the isolationist beliefs. Please explain. THANKS A LOT!

**Math**

Please respond quick