Sunday

April 20, 2014

April 20, 2014

Total # Posts: 1,800

**College Chemistry**

How do acids and bases react?

**US History**

What was the Gasden Purchase?

**CRT 205**

I AM HAVING TROUBLE WITH FINAL PROJECT ON GUN CONTROLL

**organic chemistry**

Lab was: PREPARATION OF A SYNTHETIC PLANT HORMONE

**organic chemistry**

Lab was: PREPARATION OF A SYNTHETIC PLANT HORMONE

**PHYSICS PLS HELP**

Internal resistance problem. Suppose that in Figure 3.3, Vo=13V, R1=250kphm, R2=375kohm, and Ri=1.9Mohm. Initially, the voltmeter is disconnected. EXAMPLES: What is the voltage across R2? [Answer: 7.8 V.] What is the voltage across R2 with the meter connected? [Answer: 7.2292...

**Physics**

With speed 75m/s and period 5.42ms, calculate the wavelength.

**chemistry**

what is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20 degrees C?

**chemistry**

once i have the amount of mols of sucrose present how do i convert that to sucrose? and to kj and grams? lets say i have 0.03110 mols of sucrose

**chemistry**

if 32kj of energy results in an average weight gain of 1 g of body mass, then how much weight could a person gain after eating 1 cookie. use dimensional analysis mass of 15.21g of a cookie.

**chemistry**

does not at all say. thats all that is provided. it just sais use dimensional analysis to solve this question. i have a 95% average in this class so far and iam completely puzzled. this is a bonus question on a lab.

**chemistry**

if 32kj of energy results in an average weight gain of 1 g of body mass, then how much weight could a person gain after eating 1 cookie. mass of 15.21g of a cookie.

**Algebra**

No worries, Thank you

**Algebra**

it's f to the power of -1, then i think it's called composite f. Like you know when you get the problems fog of gof? it's like that except fof and the first f is raise to -1 power. Thanks

**Algebra**

using f(x)=4x-5, find f^-1 o f

**Inorganic Chemistry**

In the molecular compound [Co(NH3)3(DMF)](NO3)3 what is the mode of bonding in which DMF is preferred?

**Inorganic Chemistry**

In the molecular compound [Co(NH3)3(DMF)](NO3)3 what is the mode in which DMF is preferred?

**College Chemistry**

Would i take the n into consideration?? This has to do with quantom numbers by the way.

**College Chemistry**

How many orbitals have the following quantum numbers: n=6, l=2, ml=-2?? a. 0, b. 5, c. 7, d. 10, e.6 Since only one can include n=6 in its equation would it make it just one orbital having those numbers? im also thinking that there might be other orbitals that have these numbe...

**XECO 212**

I would for you to point me in the direction.

**Business**

How did U.S. manufacturers become vulnerable to offshore outsourcing? What are some of the operations management practices that can help bring manufacturing back to the U.S? How can a focus on quality improve manufacturing? How can lean manufacturing and near-sourcing help a c...

**physics**

how do i solve this, i tried dividing the mass by the height, but its wrong A 407-kg pile driver is raised 15 m above ground. (a) How much work must be done to raise the pile driver?__kj (b) How much work does gravity do on the driver as it is raised?__kj (c) The driver is now...

**College Chemistry**

Thank you i appreciate it.

**College Chemistry**

Part a: What mass of solid CuCL2 is required to prepare 450.0mL of 0.125M CuCl2 solution?? Part B: What are the concentrations of Cu +2 ions and Cl- ions in the above solutions. I understand part a, and got the right answer. i need help understanding part b.

**calc-kinematics**

if a particle moves along a line so that at time t where t [0,pi] its position is given by s(t)=-4cost-t^2/2+10 what is the velocity of the particle when its acceleration is zero? so i found v(t) = 4sint-t a(t)=4cost-1 = 0 solved for t plugged it into v(t) and i got the wrong ...

**calc-related rates**

"The volume of a cone of radius r and height h is given by V=1/2(pi)(r^2)(h)If the radius and the height both increase at a constant rate of .5 cm per second at WHAT RATE in cubic cm per second, is the volume increasing when the height is 9 cm and the radus is 6 cm" ...

**Chemistry**

When solving using the quadratic equation, I get two possible values. Which one do I use? Both are positive.

**Chemistry**

What is the pH of a 0.0054 molar solution of Oxalic Acid. K1= 6.5E-2, K2= 6.1E-5? Here's what I have so far for K1: 6.5E-2 = (x)(x)/ (x-0.0054) x= 0.0059 pH = -log(0.0059) = 2.23 K2 is pretty much the same, but I have to work it out. 6.1E-5 = (x)(x + 0.0059)/ (x-0.0059) x ...

**calc**

how to find the integral of this function x^2 * root(x^3+1)

**calc**

how do i find the derivative of........ (sinx) ^2-(cosx) ^2 i put it into my t-89 and got -4sinxcosx butthats not a multiple choice. can someone tel me how to do this by hand?

**chemistry**

Choose all of the following statements about the equilibrium constant K that are true: (a) If the K value for a reaction is > 1 then Go must be negative for this reaction (b) A large value for K implies there is a strong driver for the reaction to proceed in the forward dir...

**Math**

What is 563 divided by 4 show you work

**grammar**

preschool ivite pablo on thursdays.

**Chemistry**

I'm not real sure about the K1 expressions. Is this correct? C2H2O4 --> H+ + C2O4H- K1 = (x + 0.0054)(x + 0.0054)/ (0.0054-x) Solve for x then repeat for K2

**Chemistry**

What is the pH of a 0.0054 molal solution of C2H2O4. First ionization constant K1= 6.5 x 10-2, second K2= 6.1 x 10-5.

**Chemistry**

Is the answer 0.211 mg/L PbF2?

**Chemistry**

If PbF2 is poured into a solution of 0.012 molar F-, how much will dissolve at equilibrium?

**physics**

wait but kqq/r2 is the equation for a force not an energy

**physics**

An alpha particle approaches a uranium nucleus as 1e6 m/s what is the closest this particle will get to the nucleus how do you set this problem up? thanks!

**Chemistry**

when dissolved in an aqeous solution, which of the following salts will yield an acidic solution? NH4Cl, NaClO4, Na2S, MgBr2, Ba(CH3CO2)2

**English**

I have no idea, I cannot think clearly at all today. I wouldn't even know where to start, even though I know what an analogy is.

**PHYSICS PLEASE HELP!**

Suppose an electron is released from rest in a uniform electric field whose magnitude is 4.70 103 N/C. (a)How much work is done by the field in moving the electron through a distance of 7 cm? J (b) Through what potential difference will it have passed after moving through this...

**PHYSICS PLEASE HELP!**

(a)How much work is done by the field in moving the electron through a distance of 7 cm? J (b) Through what potential difference will it have passed after moving through this distance? V (c) How fast will the electron be moving after it has traveled this distance? m/s

**chemistry**

Thank you!

**chemistry**

So how would I put AgNO3 in the equation? That part kind of confuses me.

**chemistry**

The traditional method of analyzing the amount of chloride ion present in a sample was to dissolve the sample in water and then slowly add a solution of silver nitrate. Silver chloride is very insoluble in water, and by adding a slight excess of silver nitrate, it is possible ...

**Chemistry**

There was a typo on the problem. and cobalt was never meant to be used. It should have read copper which went along with previous questions. Hence, everyone's confusion. Thanks

**Chemistry**

Determine the moles of ammonia in the following cobalt ammine complex: A sample of .1500 g of the cobalt ammine complex is places in a flask and 25.00mL of .200M HCL is added. a few drops of bromocresol green is added and the titration with .100M to NaOH required 16.42mL. I fi...

**7th grade**

Transmission

**college Psychology**

I am having trouble describing the interaction (How does effect of one Independent variable depend on level of other independent variable and why?) My 1st independent variable is Type of Stimulus: with 2 levels pictures and words. My 2nd independent variable is Type of Content...

**french**

how would you say a 'model village'?

**french**

how would you say 'a minster' not a minister

**french**

thankyou

**french**

how would you say 'it's a market town'?

**Investments Analysis**

Can anyone help with ANY of these? Any good starting points would be great! Alpha (STI) 0.90 2008 Return(STI) 15% Beta(STI) 1.20 2008 Return(INX) 10% R_squared 36% Risk Free Rate 4% Variance(STI) .1296 b. What is the relative volatility (variability) of STI returns to INX retu...

**arithmetic**

what is 11/4,4/7 and 10/21 in the simplest form i tried adding divide not coming with the right answer

**math**

how to simplify 15/60 in a fraction

**spanish**

Islam ich bien im

**spanish**

Que mama sorté quou

**Chemistry**

For the equilibrium below at 400 K, Kc = 7.0. Br2(g) + Cl2(g) reverse reaction arrow 2 BrCl(g) If 0.90 mol of Br2 and 0.90 mol Cl2 are introduced into a 1.0 L container at 400. K, what will be the equilibrium concentration of BrCl?

**chemistry**

HCl + Zn --> Predict the products and decide if it occurs. I have the activity series, but there's only H2 on there, not H.

**maths **

what is 8% p.a on $11000 over 3 years compounding anually

**Chemistry**

In one experiment, 50.0ml of 0.10M CH3NH2, is mixed with 20.00ml of 0.10 M CH3NH3Cl. The kb of CH3NH2 is 3.70*10^-4. a) write the chemical reaction for the equilibrium which becomes established, using H2O as a reactant. b)Write the net-ionic equation that occurs when Ba(OH)2 i...

**earths core**

what are a few (1 or two) reasons why the core cant be of lonestones?

**science**

was their any changes to the ocean since 10 million years ago?

**Social Studies**

What were the conditions of the mines during the Industrial Reolution? Why did so many women want to work in the mines without clothing and have heavy belts around their waists and chains between their legs?

**us history**

Write an Essay about the different perspectives that a chinese native and a christian missionary might have had on the Boxers rebellion

**pre-calc**

Find a vector perpendicular to the plane containing the given points. (0,-2,2), (1,2,-3), and (4,0,-1) My teacher was unable to finish the lesson, but I'd like to know how to solve this problem.

**Physics**

NOt rude at all. Just wants to see some effort from the poster. Although, if it's their first time posting they may not know that. The person who posted should just repost saying, "I tried this," or "I'm not sure what this means, but does it have to do w...

**lotions **

what kind of moisturizers will melt faster overtime ?

**Global History**

How did transportation improved during the Industrial Revolution?

**how to..**

how to answer this question ? describe how someone could improve the following areas of fitness in the pool. 1.cardio cascular, 2.muscle strength, 3.muscular endurance. what does this mean ? how do i answer this?

**Science**

125 mL of water at 10 C is poured onto a 500 g block of ice at -35 C. Assuming it is a perfectly insulated container, what will be the final temperature of the mixture?

**business studies**

how does the sale of fixed assets and retained earnings help in raisihg business finance

**physics**

A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.10 m/s and her body makes an angle of 77.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude an...

**physics**

An airplane is flying with a velocity of 224 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When the altitude of the plane is 2.1 km, a flare is released from the plane. The flare hits the target on the ground. What is the angle?

**Calc**

let f be the function whose graph goes through the point (3,6) whose derivatie is given by f'(x) =(1+e^x)/(x^2) 1. write an equation of a line tangent to the graph at x=3 and use it to approximate f(3.1) --- I GOT : y= (1+e^3)/(9) (.1) +6 i dont know if it is right i dont ...

**college**

A 14-year zero-coupon bond was issued with a $1000 par value to yield 12%. What is the approximate market value of the bond?

**Hydraulics**

A cylinder with a 3" bore and a stroke of 16" receives 18 gpm. What is the piston rod velocity?

**Mays Middle**

Math-The low temperature for 6 consecutive days in Montana city were 9, 3, 4, 16, 11, and 5 degrees. What would the low temperature have to be on the seventh day to have a meanh low temperature of 9 degrees for the week?

**microeconomics**

Suppose a production possibilities frontier can be expressed as + = 9. The opportunity cost of going from 0 units of X to 1 unit of X is

**College Physics 1**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens

**College Physics 1**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens

**Physics **

If a pronghorn antelope accelerates from rest in a straight line with a constant acceleration of 1.4m/s^2, how long does it take for the antelope to reach a speed of 23m/s? ____s

**Physics**

A particle experiences a constant acceleration that is north at 100m/s^2. At t=0, its velocity vector is 70m/s east. At what time will the magnitude of the velocity be 100m/s? ____s

**Physics**

An engine pulls a train of 20 frieght cars each having a mass of 5.0*10^4 kg with a constant force. The cars move from rest to a speed of 4.5 m/s in 19.7s on a straight track. Neglecting friction, the force with which the tenth car pulls the eleventh one (at the middle ofthe t...

**Physics**

A man lifts a 1.0 kg stone vertically with his hand at a constant upward acceleration of 1.8m/2^2. what is the magnitude of the total force of the stone on teh man's hand? In Newtons downward?

**holocaust**

How were Jews viewed in the United States in the pre-WWII era?

**math**

A hill is inclined at 18 degrees to the horizontal. If the base of the hill is at sea level, find my height above sea level if i walk 1.2 km up the hill

**physics**

In the Millikan oil drop experiment, an atomizer (a sprayer with a fine nozzle) is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates. Some of the droplets pick up one or more excess electrons. The charge on the plates is adjusted ...

**10th grade english**

A __________ sets up one's argument and provides a basis from which one will build his or her essay.

**world issues**

Canada has developed in many ways since Wrold War 1. From that time to the present, what do u think are the three greatest accomplishments achievements or improvments Canada has seen? why? give specific reasons for your choices. I need this help because i dont know what to wri...

**dante's inferno**

seriously?

**dante's inferno**

What does Dante say will heal all light which was dim?

**statistics**

The weights of pineapples grown are approximately normally distributed with a standard deviation of 2.5 and mean of 31 ounces. Suppose a single pineapple is selected at random. a. If a single pineapple is selected at random, what is the approximate probability that it weighs m...

**6 grade math**

Two dice are rolled. Find the odds in favor of a sum of 6.

**algebra**

6-5*8+2^3

**math**

Lines 1 and 2 are parallel. If 5 = 116°, what is the measure of 4?

**Pre-Cal**

Solve 5sinx=-4cosx for 0 less than or equal to x <2pi answers to nearest hunderth of a radian

**Pre-Cal**

Nancy and Harry are lifting a stone statue and moving it to a new location in their garden. Nancy is pushing the statue with a force of 120 newtons(N) at a 60 degree angle with the horizontal while Harry is pulling the statue with a force of 180 newtons at a 40 degree andgle w...

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