# Posts by ANON

Total # Posts: 2,830

**Chemistry**

2.422 mols is wrong.

**NEED HELP ASAP!**

Kc = 1.2^2/3.8=0.379 The container volume is doubled A(s)<------>B(g)+C(g) (3.8/2)-----x----x--- 0.379 = (x^2)/(1.9 - x) x^2 + 0.379x - 0.7201 = 0 x=0.679 M A = 1.9 - 0.679 = 1.22 M But I got it wrong.

**NEED HELP**

I got it wrong. X doesn't equal .189. I really need help on solving this problem.

**NEED HELP!**

Is x=0.189? I used the quadratic equation to solve for x from Kc = 0.514 = (0.6+x)(0.6+x)/(1.4-x). How do you find the moles of A?

**NEED HELP ASAP**

How do I find x and the moles?

**Chemistry Help**

For the first Kc I got .514 For the second Kc I got .129. How do I find the mols afterwards?

**Chemistry**

4.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.20 M, where it remained constant. A(s) <-------> B(g)+C(g) Then, the container volume was doubled and ...

**Chemistry HELP**

It is wrong. It said Incorrect. You need to compare Qc to Kc, not Kp.

**Grammar (Last one :) )**

Thank you :)

**Grammar (Last one :) )**

Except for Ronnie and _____, everyone was on time. him(my answer) he Between you and _____, I know the answer to the mystery. I me(my answer) Leave your message with Ms. Horioka and _____. me(my answer) I It was Geraldine Ferraro _______ ran for vice president in 1984. who(my ...

**English-Grammar**

Thanks :)

**English-Grammar**

So the third one is "predicate nominative"?

**English-Grammar**

Decide if the underlined (in parentheses) pronoun in the sentences below is used as a subject, a predicate nominative, or an appositive. Both Ben and (he) will graduate at the same time. (my answer)subject predicate nominative appositive The driver of that station was (she). ...

**English-Grammar**

Thank you :)

**English-Grammar**

Identify how the underlined pronoun in each sentence is being used. 18. Someone sent Ed and (me) a text from an unknown phone. direct object (my answer)indirect object 19. Mr. Simons saw Owen and (us) at the registry. (my answer)direct object indirect object 20. Show Edie and...

**Geography**

What is absolute location? A.a precise measure of where a location falls in terms of longitude and latitude using units such as minutes and seconds B.a precise measure of distance around the equator C.a more precise measure of where a location falls in terms of longitude and ...

**physics**

ive been sick so i missed a few classes and im not sure whats going on in my class these are my homework problems im trying to keep up

**physics**

In a water pistol, a piston drives water through a larger tube of radius 1.00 cm into a smaller tube of radius 1.00 mm. (a) If the pistol is fired horizontally at a height of 1.5m, use ballistics (2-D projectile motion) to determine the time it takes water to travel from the ...

**physics**

The British Sovereign coin is an alloy of gold and copper having a total mass of 7.988 g and is 22-karat gold. (a) Find the mass of gold in kg using that # of karats = 24 x (mass of gold)/(total mass). (b) Calculate the volumes of gold and copper used to manufacture the coin...

**English**

Thanks :)

**English**

Which word correctly completes the sentence? To (blank) did you write the card? A. Who B. Whom I thnk the answer is B. Whom. Which meaning of the vocabulary word steep is used in the sentence below? The steep rise in gas prices angered the population. A. Vertical B. Sudden C. ...

**physics**

A light bulb is placed 17.1 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, the bulb's image moves 6.60 cm closer to the mirror. Calculate the focal length of the concave mirror.

**S.S**

BonjoviRocker isn't being mean at all. Hes just telling him to just use his own knowledge and think a little harder next time. that's all hes saying lmao

**Chemistry**

At –11.0 °C (a common temperature for household freezers), what is the maximum mass of aspartame (C14H18N2O5) you can add to 1.50 kg of pure water and still have the solution freeze? Assume that aspartame is a molecular solid and does not ionize when it dissolves in ...

**NEED HELP!**

Can someone help me?

**Chemistry**

Classify these mixtures as colloids, suspensions, or true solutions. fog, milk of magnesia, mayonnaise, blood, table salt in water, dust-free air I got fog, milk of magnesia, mayonnaise for colloids. Blood for suspensions. Table salt in water and dust-free air for true ...

**Chemistry**

Is the freezing point 372 degree C? Kb = 0.512 Kf = 1.86

**Chemistry**

The boiling point of an aqueous solution is 102.48 °C. What is the freezing point? I know that formula for freezing point is delta Tf = Kf*m but what do I plug in for each?

**Chemistry**

If M = 0.498 do I times that by 475 mL converted to L to find out the mols and then times that answer by 4.65g to find the molar mass?

**Chemistry**

When 4.65 g of a nonelectrolyte solute is dissolved in 475 mL of water at 27 °C, the resulting solution exerts an osmotic pressure of 931 torr. What is the molar concentration of the solution? How many moles of solute are in the solution? What is the molar mass of the ...

**Grammar**

Which of the following words does NOT share the same etymology as the vocabulary word symmetry? A.synthesize B.symbol C.symphony D.sympathetic I think the answer is B. symbol. Thanks for the help :)

**ACCOUNTING (Advance Sales)**

Hi: I am unsure of how to adjust Advance Sales. For Year End, DEC 31, 2011. If my Unadjusted Balance for advance sales is $324,000 and I am told the following: 75% of the balance in Advance Sales is for garments to be made and delivered in 2012; the remaining 25% is from sales...

**ELA 10**

t r i g g e r e d

**Geography**

It was right :)

**Geography**

Thanks :)

**Geography**

So I should make "all of the above" the answer?

**Geography**

So, they are all the right answer? I know any of these maps could be used to describe a city, but I don't know if they are all the answer. Wish the question was regular multple choice...

**Geography**

What kind of map could you use to show information about a city? -a relief map -a population density map -a political boundary map -a vegitation map -All of the above You can pick as many as you want, but the question is only worth one point. I think the answers are political ...

**English-Grammar**

Thanks :)

**English-Grammar**

Decide if the underlined pronoun (I put what was underlined in parentheses) in the sentences below is being used as a subject, a predicate nominative, or an appositive. (He) and Bev are using the new computer. subject (my answer)predicate nominative appositive The dancers on ...

**Chemistry**

You need to dissolve CaCl2 in water to make a mixture that is 31.5% calcium chloride by mass. If the total mass of the mixture is 254.6 g, what masses of CaCl2 and water should be used?

**Chemistry**

Sort each of the following events based on whether the solubility of the indicated gas will increase, decrease, or stay the same. Each phrase specifies the gas involved and the change in its environment. 1. The temperature is increased 2.the partial pressure of an anesthetic ...

**Physics**

When a 1.53-kilogram mass is placed on a spring with a spring constant of 30.0 newtons per meter, the spring is compressed 0.500 meter. How much energy is stored in the spring?

**PHYSICS**

When a 1.53-kilogram mass is placed on a spring with a spring constant of 30.0 newtons per meter, the spring is compressed 0.500 meter. How much energy is stored in the spring?

**Physics**

When a 1.53-kilogram mass is placed on a spring with a spring constant of 30.0 newtons per meter, the spring is compressed 0.500 meter. How much energy is stored in the spring?

**physics**

T=(f)(d) torque=force x distance T=40NM D=30cm=0.3m F=? T=(f)(d)...F=T/D F=40NM/0.3m =133.3N

**AP Calc**

For the function find the derivative of its inverse given a point on the original function: y = 3x+1 point (0,11) What am i supposed to do with the point?

**AP Chem**

Be and B are the huge ones on breaking the octet rule. But, for that question they gave BeH2 so, I guess reasoning is that they are the exceptions? It's multiple choice. but I still want to understand it.

**AP Chem**

Is it because it only has four electrons to begin with with only two valence electrons? There's no way it can possible even make an octet?

**AP Chem**

A valid Lewis structure of __________ cannot be drawn without violating the octet rule. Answer: BeH2 Why would BeH2 break the octet?

**AP Chemistry**

Thank you sir.

**AP Chemistry**

The Lewis structure of PF3 shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs. Is the answer 1, 3 Is it 1 because it asked for PAIRS- so there are two electrons not bonded- so one pair?

**chemistry**

1.4169*10^16

**chemistry**

They are BOTH wrong.

**Math**

Kamman VanMarko Plumbing equipment sales Commission rate: 9 1/2% Annual base salary: $17,496 Month's sales: $2,460 What is the monthly pay?

**Differential Equation**

is it from 0 to 21? or 0 to 4.7??

**Differential Equation**

for 0<=t<=21 the rate of change of the number of black flies on a coastal island at time t days is modeled by R(t)=3sqrt(t)cos(t/3) flies per day. There are 500 flies on the island at the time t=0. To the nearest whole #, what is the max # of flies for 0<=t<=21? ...

**calculus**

wait...dont u have to integrate it from 0 to 21 or something?? n how would you integrate this equation?

**calculus**

for 0<=t<=21 the rate of change of the number of black flies on a coastal island at time t days is modeled by R(t)=3sqrt(t)cos(t/3) flies per day. There are 500 flies on the island at the time t=0. To the nearest whole #, what is the max # of flies for 0<=t<=21?

**calculus**

wait..so how would you integrate that equation..im hving trouble with tht..

**calculus**

wait..dont u hve to integrate it?

**calculus**

for 0<=t<=21 the rate of change of the number of blakc flies on a coastal island at time t days is modeled by R(t)=3sqrt(t)cos(t/3) flies per day. There are 500 flies on the island at the time t=0. To the nearest whole #, what is the max # of flies for 0<=t<=21?

**calculus**

A. The cost of the timber lost = 1000 h The cost to have x firemen is x(25 h +20) The time to stop the fire is t= 3600/x C= 1000 h + x(25h + 20) B. Set h = t H = 3600/x C. Substitute for x in cost equation C= 1000 h + x(25h + 20) = 1000*3600/x + x(25*3600/x +20) = 3.6*10^6/x...

**calculus**

a) C=1000h+20x+25xh b) h=3600/x c) C=1000(3600/x)+20x+25x(3600/x) C=3600000/x+20x+90000 dc/dx=-3600000x^-2+20 -3600000x^-2+20=0 3600000x^-2=20 20x^2=3600000 x^2=180000 x=180000^1/2 (approx. 424.26) to justify it do d2c/dx^2 d2y/dx^2=7200000x^-3 sub in your answer 7200000*(...

**calculus**

Ok. Just do it the brute-force way. Initially, the area is 1/2 x 5 x 10 = 25 After one minute, the area is 1/2 x 6 x 7.5 = 22.5 After two minutes, the area is 1/2 x 7 x 5 = 17.5 You can see that the area is decreasing. In terms of derivatives, the rate of change is exactly ...

**Forensics**

A sample of light brown powder found in the kitchen of an alleged drug house gives a blue precipitate with cobalt thiocyanate. What is it? Is there enough evidence to prosecute?

**Math-trig**

The question in the textbook misses key information

**Grammar**

Thank you so much!! :D

**Grammar**

Am I using "into" properly in this sentence? Enrolling into college with an undecided major... I don't if I should use "to" or "into". Thanks :)

**Grammar**

Thanks :)

**Grammar**

Is this the right form of "to" in this sentence? I believe an education at XX College would give me the opportunity to hone my abilities and turn them into skills that can be translated to a successful career.

**Chemistry**

So it is a combination reaction, then?

**Chemistry**

What type of reaction occurs between zinc and Acetic acid? I think it is double replacement but I am not sure. Thank for the help :)

**Grammar**

Thank you :)

**Grammar**

I am writing an essay and for this sentence, I don't know if I have used the right tenses of "can" and "give". Please check to see if they are right :) "Using the insight gained from her road of life, she has given me the best life she can while ...

**Chemistry**

Go to back to H4P2

**Chemistry**

The data for everyone of us is different as you noticed formula is required

**Chemistry**

What is 4

**Chemistry**

He has got a point, though he did it a bit too aggressively. What he wants to know is, what are the formulas for working out these two questions? After all, a similar question could pop up in the final exam! To tell you the truth, i kinda miss how it was at the beginning of ...

**math**

9/20 7/10 4/5

**Biology**

bye boy. No one asked you to comment. I obviously could not find the answers to these question hence me posting them.

**Biology**

1. Two species live in the same area but breed in different parts of their habitat. These species are A) geographically isolated. B) ecologically isolated. C) artificially isolated. D) likely to produce hybrids. 2. A large population of animals is split in two by a physical ...

**7th gade math Ms. Sue please**

I used " nothing poeple " and " the girl that has no friends" answers and got a 100%. Thank you!

**Grammar-clauses**

I put the underlined parts of the sentences in parentheses. William Faulkner’s The Sound and the Fury is a novel (that uses the technique of stream of consciousness). independent clause adverbial clause adjectival clause (my answer) noun clause It takes effort to imagine...

**English-Grammar**

So the second one is a compound sentence?

**English-Grammar**

Although he was born in Scotland, he became a hero of the American Revolution. simple sentence compound sentence complex sentence (my answer) compound complex sentence His ship was badly managed, but Jones refused to give up. simple sentence (my answer) compound sentence ...

**English-Grammar**

thanks :)

**English-Grammar**

After the war, American shipping became vulnerable to attacks by pirates. simple sentence (my answer) compound sentence complex sentence compound complex sentence

**English-Grammar**

John Paul Jones moved to America to avoid a trial that involved his handling of a mutiny. simple sentence compound sentence complex sentence (my answer) compound complex sentence

**Chemistry**

No, the solubility of PbCl2 would remain roughly unchanged.

**Chemistry**

if you want that question answered, post it separately.

**physics**

water is moving at a velocity of 2m/s through a hose with an internal diameter:1.60cm. What is the flow rate in liters per second?

**math/algebra**

A kicker punts a football from 3 feet above the ground with an initial velocity of 47 feet per second. Write an equation that gives the height (in feet) of the football as a function of the time (in seconds) since it was punted. Find the height (in feet) of the football 2 ...

**Calculus**

Let f be a continuous function on the interval [0,2] which satisfies integral of f(x)dx=5 when b is 2 and a is 0. Give this information compute the definite integral f(2y)dy when b is 1 and a is 0. Solve this

**Calc-Derivative**

Find the derivative of x^(1/x). Can someone show me steps for this problem...I go round in circles

**Chemistry**

The figure below is a heat curve for an unknown outerspace substance discovered by the Mars rover. By understanding the heat curve, scientists can make inferences about the composition of the planet. What is the temperature of fusion, Tfusion, and vaporization, Tvapor, for ...

**Chemistry**

What is true for water? A) In a phase diagram the solid-liquid coexistance line has a negative slope. B) In a phase diagram the solid-liquid coexistance line has a positive slope. C) The solid is more dense than the liquid. D) The solid is less dense than the liquid. E) The ...

**English-Grammar**

Thanks :)

**English-Grammar**

Which of the following is an example of an adverbial clause fragment? A.wherever there is a chance for a fabulous meal B.who described the book as a compelling masterpiece C.that the poet choose words carefully to convey a particular tone I think the answer is A, but I am not ...

**Chemistry**

Enthalpy of fusion 333.6 J/g 6010. J/mol Specific heat of solid H2O (ice) 2.087 J/(g·°C) 37.60 J/(mol·°C) Specific heat of liquid H2O (water) 4.184 J/(g·°C) 75.37 J/(mol·°C) Specific heat of gaseous H2O (steam) 2.000 J/(g·°...