Friday

April 18, 2014

April 18, 2014

Total # Posts: 91

**Chemistry**

How exactly do you get pH from Ka?

**Chemistry**

The following questions refer to the following acids and bases. A) Hydrazoic acid HN3 Ka = 1.9 x 10^-5 B) Hydrofluoric acid HF Ka = 6.8 x 10 ^-4 C) Nitrous Acid HNO2 Ka = 4.5 x 10^-4 D) Phenol C6H5OH Ka = 1.3 x 10^-10 E) Aniline C6H5NH2 Ka = 4.3 x 10^-10 1) which compound is b...

**Strayer**

Which of the following units could be associated with a vector quantity

**Social Studies (History)**

When searching for evidence to support a claim, what are important things to remember? Please explain your response.

**physics**

A certain LCD projector contains a single thin lens. An object 23.5 mm high is to be projected so that its image fills a screen 1.87 m high. The object-to-screen distance is 3.05 m. (a) Determine the focal length of the projection lens. mm (b) How far from the object should th...

**urgent urgent algebra / precalculas**

1. Given a function,H(x)explain how to find the components f(X)AND g(x) such that f(g(x)) = H(x) 2. let H(x)=(2x+5)^4 find the function f and , so that f(g(X))=H(x)

**urgent urgent algebra / precalculas**

For # 1, im getting stuck on this problem i dont understand this 1.4 = e ^ (0.03k) Now take the natural logarithm of both sides to solve for , ln 1.4 = ln e ^ (0.03k) ln 1.4 = 0.03k * ln e Recall that ln e = 1. ln 1.4 = 0.03 k Solve for k. Then try part b. For # 2, y = 3 + e ^...

**urgent urgent algebra / precalculas**

rewrite each in exponential expression as a logarithmic expression log, x=4 log 5=2 log b=x

**urgent urgent algebra**

rewrite each in exponential expression as a logarithmic expression a)log,x=4 b)log 5=2 c)log ,8=x

**algebra URGENT HELP**

cohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the bloodstream...

**urgent urgent algebra / precalculas**

lcohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the bloodstrea...

**urgent urgent algebra / precalculas**

Alcohol and Driving The concentration of alcohol in a person’s bloodstream is measurable. Suppose that the relative risk R of having an accident while driving a car can be modeled by the equation R = e kx where x is the percent of concentration of alcohol in the bloodstre...

**urgent urgent algebra**

find the composite function fog f(X) = 1/X-5,g(x)-6/x question 2 find inverse, domain range and asymatotes of each function f(x)=3+e^4-x can some one help me please been stuck on these for 2 days need help solving thank you

**algebra URGENT HELP**

7x-6 greater than or equal to -3x^2 reduced and written in interval notation

**algebra URGENT HELP**

x+14/x-8 ≥ 1 solve and write solution in interval notation

**algebra URGENT HELP**

analyze the graph of the following function solve R(x)=x(x-16)^2 /(x+11) solve the following inequality write solution in interval notation x+14/x-8 less than or equal to 1

**algebra URGENT HELP**

form a polynomial whose degree and zeros are given. dont expand a) degree 3,zeros,-2,0,4 b)degree 4,zeros, -2 multiplicity 3,1 multiplicity 1 solutions a)p(x)= x(x+2)(x-4) B)p(x) =(x+2)^3(x-1)

**algebra URGENT HELP**

A)p(x)= x(x+2)(x-4) b)p(x)=(x+2)^3(x-1)

**algebra**

p(X)= X(X+2)(X-4) P(X)=(X+2)^3(X-1)

**algebra**

solve A)p(x)= x(x+2)(x-4) b)p(x)=(x+2)^3(x-1)

**college algebra**

given the following polynomial find the zero and multiply of each were the graph touches the x axis number of turning points fx =(x-4)(x^2-25)

**college algebra**

y=x^2+2x+8

** college algebra**

Given the following quadratic equation, find;? a. the vertex b. the axis of symmetry c. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function. y= -x^2+2x+8

**help college algebra**

given the following piecewise function f(x) = -x+1 for x<0 -1 for 0<x<3 -2x for x>3 find the domain find the range find the intercept d) is f continuous on it domain if not sate where f is dicontinous

**college algebra**

given the function fx=x^3+x a) find the rate of change between the two stated values for x: 1 to 2 B)find the equation of a secant line containing the given points (1,f(1))and (2,f(2)

**algebra**

what are the intercepts of y=2x+2

**math**

solve for x 75=13^x

**Math**

Rearrange this equation to isolate c. a=b((1/c)-(1-d))

**college chem**

Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?

**urgent urgent urgent**

what is the chemical make up of actin and myocin

**urgent urgent urgent**

A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. •Explain the chemical process that occurred ...

**urgent urgent urgent**

A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his thighs and pain in his biceps. explain the process the muscle go through

**chemstry**

the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement

**chemistry urgent urgent**

... the hiv virus that causes aids destroys the immune system in the body. classify the hiv virus and explain the statement.

**Math**

Emily wants to make a rectangular model with a height of one connecting cube. She wants to make the model in exactly 2 different ways. How many connecting cubes could Emily use to make the model in only two ways

**chemstry**

Classify six kinds of amino acids according to the functions that they serve in the human body, stating an example for each class.

**chemistry urgent urgent**

thank you

**chemistry urgent urgent**

Discuss, in detail, the role played by DNA and RNA in genetic diseases. What are the breakthroughs, if any, in the treatment/management of genetic diseases?

**chemistry urgent urgent**

the managing director of a company on wall street thrives on a diet of fruit jam,bread,pasta,and coffee.she exercises intermittently.one day she desides to go to her primary healthcare provider for a check up the provider recommends that she takes the benedicts test assume tha...

**chemistry**

A freshman is currently enjoying the Arts Studio program she is pursuing at a well-known university. In her free time, she likes to skate, take salsa dance lessons, and cook. She particularly enjoys pickling and decides to pickle olives over a leisurely weekend. According to t...

**chemistry urgent urgent**

do compare the differentes

**chemistry urgent urgent**

Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?

**Chemistry: Dr. Bob, can you check my work?**

The first one was correct! I just used the incorrect number of sig figs. Thank you so much!

**Chemistry: Dr. Bob, can you check my work?**

Okay. I'll try both. 825mL - 712= 113. You have to convert mL to L in order to use the PV = nRT correct? if so,113mL=.113L P(.1130) = 1.47 moles CO2 * .0821 * 303 K .1130P=36.57 P = 323.6 atm -OR- 825-85.4 = 739.6 mL = .7396L .7369P=1.47(.0821)(303) .7369P=36.57 P=49.6atm

**Chemistry: Dr. Bob, can you check my work?**

In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a to...

**Chemistry**

I'm still not sure which volume to use though. would it be 825 mL, 825mL - 85.4 mL, or 712 mL?

**Chemistry**

Sorry, I made a mistake. 85.4 mL = .0854 L. .0854 L * .79 g/cm3 = .0675g. .0675/46(MM of C2H5OH) = .0147 moles ethanol. .0147 moles ethanol = .0147 moles CO2.

**Chemistry**

I found the moles of CO2 and I got 1.47. 85.4 L ethanol * .79 g/cm3 = 67.5g ethanol. 67.5/(12+12+5+16+1)= 1.47 moles ethanol. 1.47 moles C2H5OH *(2 moles C2H5OH/ 2 moles CO2) = 1.47 moles CO2. What do I use for the volume? do I use the volume of the bottle, the volume of the b...

**Chemistry**

In the "Methode Champenoise," grape juice is fermented in a wine bottle to produce sparkling wine. The reaction is given below. C6H12O6(aq) 2 C2H5OH(aq) + 2 CO2(g) Fermentation of 712 mL grape juice (density = 1.0 g/cm3) is allowed to take place in a bottle with a to...

**History**

Can you give me an idea of what to write for a veteran card

**History**

Write a thank you veteran card

**college algebra**

given the following rational, find the horizontal asympotes the vertical asymptotes if any and the oblique asymptotes if any f(x)=x^2-x-2 over 2x^2-x-10

**college algebra**

given the folowing quadratic equations find the vertex the axis of symmetry the intercept the domain the range the interval where the function is increasing andthe interval where the function is decreasing graph the function y=X^2+4x

**college algebra**

given function f(X)=X^3+3x findthe rate of change between the two stated values for x:1 to 2 find the equation of a secant line (1,f(1)and(2,f(2))

**college algebra**

graph the following function using transformations, be sure to graph all of the stages on one grph, state the domain and range y= x^2 +12x

**college algebra**

given the function f(x)= x^3+3x find the rate of chnge between the two values x:1 to 2 find the equation of a secant line containing the given points (1,f(1) and (2,f(2))

**college algebra**

graph the following function using transformations, be sure to graph all of the stages one graph, state the domain and the range y=x^2+12x

**college algebra**

given the functionf(x)=x^3+3x find the rateof change between the two stated values for x:1 to 2 find the equation of a secant line containig the given points (1,f(1))and (2,f(2))

**college algebra**

write the equation of the circle in standard form find the center radius, intercept and graph circle x^2 +y^2+8x+2y+8=0

**college algebra**

for the given equation list the intercepts and test for symmetry y = x^3 -512

**Chemistry**

In the second half of the experiment 3mL of hydrochloric acid and 30mL of barium chloride were reacted with a 0.7g sample of alum to get barium sulfate. The question says based on the mass of barium sulfate (0.46g), calculate the mass of sulfate in your sample of alum.

**Chemistry **

Based on the mass of barium sulfate (0.46g), calculate the mass of sulfate in a 0.7g sample of alum. I think I did this right but i'm not sure. 0.46g BaSO4/233.37g BaSO4=0.002mol BaSO4 0.002mol BaSO4 x 1mol SO4/1molBaSO4=0.002molSO4

**Chemistry**

Do I have to add q of the caloriemeter to that?

** Chemistry **

How would I find the limiting reagent in the chemical equation...CuSO4*5H2O+2K2C2O4*H2O-->K2[Cu(C2O4)2]*2H2O+K2SO4+5H2O I got that K2C2O4 was the limiting reagent but I dont know if that is correct.

**Math**

Jenifer works in a flower shop. On Saturday she started work at 8:45 a.m. She finsihed at 4:15 p.m. How many hours did Jenifer work after noon?

**algebra**

The week before the big concert, five friends Alan, Ben, Cameron, Derryck, and Garrett, stood in line to buy tickets. There were other people there, but the five friends were in the line in the order listed above. The line was really long, and they were pretty bored. Cameron n...

**algebra**

The week before the big concert, five friends Alan, Ben, Cameron, Derryck, and Garrett, stood in line to buy tickets. There were other people there, but the five friends were in the line in the order listed above. The line was really long, and they were pretty bored. Cameron n...

**Math**

what is scale

**english**

Cookies and doughnuts were displayed in the bakery window. What is the compuund subject and verb in this sentence?

**Math**

Round 5,024 to the nearest thousands

**Algebra 2**

What is the vertex of the graph of y = |x + 3|?

**Computer**

What general term describes the physical equipment of a computer system, suchn as its video screen,keyboard, and storage devices?

**software**

Software programs that allow you to legally copy files and give them away are called what?

**Algebra **

what is the greatest common monomial factor of 6x^2y^3z^4-4x^3y^3z^3+10xy^3z^4

**Math**

I dont know

**Physics**

a superhero flies 272m from the top of a tall building at an angle of 32 below the horizontal. what is the vertical component of the superhero's displacment?

**geometry**

dsds

**geometry**

dsds

**geometry**

dsds

**Algebra 1**

What is the Advantage of Buying a Magnetic Bullein Board

**Foreign Languages**

Can someone tell me what Melodifestivalen is?

**Foreign Languages**

How do you say "I love you,my love,when I hear the voice I love you,my life is never without you I live my life for you,It's the universe for me I love you,my love,when I her the voice" in French

**6th grade**

I'm a special ed kid and I need help to unscramble these science words ,itvbarnoeso, lncsuoicno and ecrfenine

**math**

i cant figure out the distributive property of 2a+4b I

**quadratic**

what is -x^2+4=(3x-1)^2 in the form ax^2+bx+c=0

**kinematics**

these are two similar kinematics maths question which i dont know. Please help! 1)A particle moves in a straight line so that its distance, s metres, from a fixed point O is given by s = 2t^3 - 3t^2 - 12t + 6, where t is the time in seconds after passing O. Find the minimum sp...

**math**

20?

**social studies**

what was william penn's four promises for others to come to philadephia

**algebra**

of ten boxes, five contain pencils, four contain pens, and two contain both pencils and pens. How many boxes are empty??

**Chemistry**

Calculate the molar mass of a compound that raises the boiling point of water to 100.15oC when 40.5 g of the compound is dissovled in 500 g of water. and A mass of 41 g of an unknown nonelectrolyte is dissolved in 429 g naphthalene. The nonelectrolyte lowers naphthalene's ...

**Chemistry**

In an experiment 0.5300 g of ferric oxide is reacted with 0.3701 g of carbon monoxide gas according to the equation: Fe2O3 + CO ==> Fe + CO2. A. What is the limiting reactant? B. What mass of the other reactant is in exess? C. What mass of iron is produced?

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