# Posts by t

Total # Posts: 414

**MATH**

7 hrs

**chemistry**

How many moles of water, H2O, are present in 75.0 g H2O?

**science**

please help me unscramble oaoptvaien,aionitnrptsa rawdoungete & ntsiocnndeoa

**sociology**

I second that Stine.. I'll give you guys a hint, it has partiality to do with Conflict Theory.

**Math**

Donna and Rod bought a new van at an end of year sale for dealer cost plus 5%. If they paid $17,325.00 what was the dealer cost in dollars?

**6th grade**

wow. i learned something new! thank you both!

**6th grade**

i'm a little shy on X values sorry, but does that help?

**6th grade**

Exuse my ignorance, i'm in algebra 1 honors, but is the 7.50 represented by X? meaning 7.50x1/5?

**6th grade**

1/6

**math**

what is the question? isolate the X?

**Algebra**

can i get a formula?

**Algebra**

Terence wants to estimate the height of a tree. He places a mirror on level ground, as shown in the picture below, and stands so that he can see the top of the tree in the mirror. Since light bounces off the mirror at the same angle at which it strikes the mirror, angle 1 ...

**6th grade science**

magnetite will attract this

**science**

magnetite will attract this

**Physics( Checking answer)**

The first bullet has 2.4 Joules of energy, and the second has 9.6 Joules of energy. The equation is 1/2*m*v^2: You forgot that the mass is given in grams instead of kilograms, so you need to convert to kg (grams/1000, so .003 kg). You also didn't square the velocities. The...

**Chemisty**

A 5M solution is diluted 1/10 and again 1/5. What is the concentration of each dilution?

**PreCalc**

what is the cot of theta if the cos of theta = 4/9 and theta lies in quadrant IV

**chemistry**

The beaker with with 300ml of water contains more heat.

**calc**

Average daily temp,y, is y=45-23cos(2pi(x-32)/365), where x is time in days, x=1, corresponds to Jan 1 and y is temp in degrees F. Determine the period of the function. Determine critical numbers, over one period. Determine relative extrema, what does relative extrema represents

**Math**

Depreciation of an office machine. Data regarding the value of a particular color copier is represented in the following graph. At what rate is the value changing?

**college**

The value of a mint state 63 uncalculated 1950 Jefferson nickel minted at Denver is 8/7 the value of a 1945 nickel in similar condition minted at Philadelphia. Together the total value of the two coins is 15.00 what is the value of each coin?

**Math (Very Easy Math)**

Simplified-down to lowest terms;cannot be reduced any more. I hope this helped,this is my own definition.

**CHEMISTRY (WEBWORK)**

^^ that's right. i just got it.

**Physics**

While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?

**Algebra**

Amy paid $67.15 for a pair of running shoes during a 15% off sale. What was the regular price?

**Geometry 10th grade**

Find the perimeter or given triangle. KLM if JHG~KLM, KM=6, HJ=3, JG= 4, and GH=6. The biggest triangle is FHL. KLM is part of right corner of the big triangle and JHG is the left corner of the big triangle.

**math**

Math:How could the following information be represented as a ration? Of fifty people interview, none had ever eaten sushi. is it 50:0

**geometry**

a rectangle field is 130 m by 420 m. a rectangle barn 19 m is built in the field. how area is left ove?

**human services**

What are some health hazards employees may encounter in human services?

**chem-redox**

write down Oxidation equation, Reduction equation and Overall equation theres 3 equations *H2O2 + H2SO4 + KMnO4 *H2O2 + KMnO4 *and *Ethanol + H2O2 + K2Cr2O7

**Algebra 2 with trigonometry**

2sin2xcos2x cos^4x-sin^4x (sinx+cosx)^2-sin2x 2sinxcos^3x+2sin^3xcosx

**Algebra 2 with trigonometry**

2sin2xcos2x cos^4x-sin^4x (sinx+cosx)^2-sin2x 2sinxcos^3x+2sin^3xcosx

**Algebra 2 with trigonometry**

A baseball diamond is a square 90 feet on a side. The pitcher's mound is 60.5 feet from home. How far does the pitcher have to run to cover first? (we are using the LAW OF SINES AND COSINES)

**chemisty**

how many grams of precipitate are produced when 0.300 M K2CrO4(aq) (50.0mL) are added to excess BaCl2(aq)?

**science**

CO2 binds with water to make carbonic acid (H2CO3)

**critical thinking**

Premise- Since most all disease can be effectively prevented by a healthy lifestyle. Conclusion-Animal activist sometimes contend that medical research is unneccessary. Is this a valid/sound argument or is this an ivalid/unsound argument?

**chem - pressure**

i did p1/t1 =p2/t2 converted celsius to kelvin i get 935.5 mmHg for a then 333.2 for b i don't get c

**chem - pressure**

A closed vessel with volume of 226.9mL initially contained air at 680.8mmHg at 16.5 degrees celcius. A sample of an organic liquid of mass 0.113g was injected into the flask which was then warmed to 124.9 degrees celcus causing all the organic liquid to vaporise. The final ...

**chemistry**

A closed vessel with volume of 226.9mL initially contained air at 680.8mmHg at 16.5 degrees celcius. A sample of an organic liquid of mass 0.113g was injected into the flask which was then warmed to 124.9 degrees celcus causing all the organic liquid to vaporise. The final ...

**chemistry**

the answer in the book was 4.3 grams but if you do that you get 169.8731/0.988 which is 171.94 g i don't get it

**chemistry**

it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?

**chemistry**

it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?

**MANAGEMENT ACCOUNTING**

The representation for fixed cost per unit of activity is:

**marketing-**

Factors Alex should consider include external influences (i.e., culture, subculture, demographics, social status, reference groups, family, and marketing influences) and internal influences (i.e., perception, learning, memory, motives, personality, emotions, and attitudes). ...

**Accountingt**

ert

**Chemistry**

The pressure inside a hydrogen-filled container was 2.10 at 21 . What would the pressure be if the container was heated to 96?

**calculus**

Let F(s)=5s2+1s+4. Find a value of d greater than 0 such that the average rate of change of F(s)from 0 to d equals the instantaneous rate of change of F(s)at s=1.

**chemistry**

Okay, I guess I should rephrase my question. I know how to go from moles to grams. My REAL question is the dilution part. When I do M1V1 = M2V2, I do (0.562 M)(0.001 L) = (x)(0.05 L), but that doesn't seem right, because the answer is 0.01124 mol and when I convert that to...

**chemistry**

Mass of Aspirin tablet: 0.357 g 10 mL of 1 M NaOH was added to the aspirin tablet in a 125 mL Erlenmeyer flask and heated to a boil. The solution was transferred to a 100 mL volumetric flask and the flask was filled to the mark with DI water. 1 mL of the solution was pipetted ...

**math**

never mind got it... Thanks

**math**

what are the subsets of S?

**math**

WHAT IS A 100-GON

**Physics**

So, V^2=g*L V=sqrt 9.8 * 2.17

**AP Physics B (Heat Engines)**

Do not multiply the percentages you calculated by .65, because you already multiplied it to get 17% and 14.6% :)

**math**

A pair of dice are rolled and the sum on their upturned faces is recorded. What is the probability that the sum showing is 8, given that one die is showing a 5?

**algebra**

y-9>-16 the solutions is y> i don't get this?

**Chemistry**

What volume of 0.178 solution is necessary to completely react with 92.3 of 0.106?

**3rd gr social studie**

He know how to do the work it just when the teacher is explaning the lesson is the problem.

**3rd grade**

my need help with 3rd grde social studies

**Algebra 1**

y=-2x + 4

**Economics**

The statement, “A manager should never hire another worker if the new person causes diminishing returns.” is false. A manger should hire what is needed as long as the point of negative marginal product is not reached. Going beyond the point of diminishing returns is...

**statistics**

The sum of the residuals is __________. Is it 0?

**AP Chemistry**

I need help with figuring out an appropriate way to do this sort of lab: how to determine an unknown compound. With this one however, the teacher just gave us a white powdered compound - and asks us to figure out how to identify it using ANY lab procedures. He gave hints that ...

**data management (gr.12)**

2^n-1=2^4-1=15 2 is always the base (you either pick it or you don't) and 4 because there are 4 options and subtract one because you exclude the empty or null set.

**Stats**

In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for...

**ART**

HENRY MOORE

**statistics**

In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for...

**Chemistry**

hi i was just wondering what the solution would be to: AgNO3 + Na2S2O3 + sunlight (light enegy) ?

**science**

how much water is there in a can of coke

**science**

are the ingrdients in coke soluble or unsoluble

**science**

why does warm coke go flat

**science**

why do bubbles form in coke when poured into glass

**science**

when a coke can is frozen it explodes, why

**science**

why do coke cans get moisture on the outside when they are taken out of the fridge

**math**

a plane with an airspeed of 192mi/h is headed on a bearing of 121 degrees. a north wind is blowing (from north to south) at 15.9 mi/h . find the ground speed and the actual bearing of plane.

**MATH**

a traingle has an area 48 square cm and its shorter sides have lengths 9cm and 12cm. find the lagest angle of the traingle.

**MATH**

The Captain of a freighter 8km fromthe nearer of two unloading docks on the shore finds that the angle between the lines of sight to the docks is 35 degrees. if the docks are 10km apart, how far is the tanker from the farther dock? The Captain of a freighter 8km fromthe nearer...

**MATH**

Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h The angle between their flight paths is 75 degrees after three hours, how fart apart are they? answer: so it would be c^2=a^2+b^2-2ab cos C 900^2+1260^2-2(900)(1260)(cos75) c^2=33542.9 c=...

**excel 2007**

I need an excel formula that averages students test scores, dropping the lowest score if all 5 tests are taken

**excel 2007**

I have to average students test scores but if they have taken all five tests, I need to drop the lowest score before averaging

**chemistry**

Opps. That must have been a mistake made by the teacher when typing because I just looked back at an extra i had of the worksheet and it is printed exactly as i typed it. no worries. i did my best.

**chemistry**

I have more more problem i need some help figuring out. I really do not know how to even approach this problem; there is so much information. - A newspaper article about the danger of global warming from the accumulation of greenhouse gases such as carbon dioxide states that &...

**Chemistry**

i figured out my question, haha. will post if i need more help. thanks again! this website is amazing!

**Chemistry**

youre right. we were taught to use dimenstional analysis as opposed to a formula. i'm a bit confused at this point now. 3a. convert mols (CN)2 to mols CF4. I'm not sure how to set it up. Do i put the mols of (CN)2 I found (which is 2.67 by my caluculations) over 2CF4? ...

**Chemistry**

When you say in step 2a to convert you mols by using grams/molar mass, you do mean to just put 80/the molar mass of (CN)2 correct? because i have been taught to do it differently.

**Chemistry**

THANKS SO MUCH. i actually typed number two exactly as written. maybe that's why it is so confusing to me too - it really does not contain all the infomation needed, at least i do not think it does.

**Chemistry**

I have a few questions, if anyone can help me at all it would be amazing. i need this done by TOMORROW (03/03/2008) 1. Cyanogen has been observed in the atmopshere of Titan, Saturn's largest Moon, and in the gases of the interstellular nebulas. On Earth, it is used as a ...

**Chem**

I have a few questions, if anyone can help me at all it would be amazing. i need this done by TOMORROW (03/03/2008) 1. Cyanogen has been observed in the atmopshere of Titan, Saturn's largest Moon, and in the gases of the interstellular nebulas. On Earth, it is used as a ...

**algebra or math**

Explain in words how to write an equation that is part one: parallel and then also part two: perpendicular to the equation y=2/3x-4 passing through the point (-2,-5). Write your answer in standard form.

**math**

try this (89+76+65+x)/4 ≥ 70

**math**

.25x=60 solve for x. (your number)

**Chemistry**

duh, that makes sense. Thanks

**Chemistry**

What volume of O2 is required to react with excess CS2 to produce 4.0L of CO2 Assume all gases at STP. Not sure what I am doing wrong, but the answer I am getting is not one of the answers. 4L/X mole=22.4 L/1 mole ===>.1786 mols Balanced equation: O2 + CS2 --> CO2 + S2 ....

**science**

can anybody give me an explanation of the kinetic theory. My science is due on friday 16th november. please help!

**science**

cam anybody give me an explanation of the kinetic theory. My science is due on friday 16th november. please help!

**chem**

how would you make a 4% percent paraformaldehyde solution? Work: starting from 20% (diluted with PBS) V1C1=V2C2 (100)(20)=(x)(4) x=500 so add 496 ml of PBS (accounting for 4% paraformaldehyde) or would you add 500ml of PBS Thank you

**Algebra**

8(a-b)2+14(a-b)-15 Is 8(a-b)2 supposed to mean 8(a-b)^2? If so, what you have written can be factored into [2(a-b)+ 5][4(a-b)-3] = (2a -2b +5)(4a -4b -3)

**Human Resources Management**

Recommending to a company's board of directors that affirmative action policies be implemented.? Include points supporting the recommendation and clearly address points that may be used agaisnt this recomendation. How affirmative action policy will relate to compliance ...

**Human Resource Management**

how to address the board of directors that affirmative action should be implemented Tell the board that it's the law that affirmative action must be addressed. Do your research to cite the specifics.

**Algebra**

Adult tickets for a play cost $9 and child tickets cost $8. If there were 23 people at a performance and the theater collected $193 from ticket sales, how many children attended the play? A = number of adults C = number of children Set up two equations. A + C = 23 9A + 8C = ...