Thursday

July 24, 2014

July 24, 2014

Total # Posts: 98

**Math**

Simplify M^3 n^6 / m^4 n^4 p^-2

**Chemistry**

How many grams of sodium acetate, NaC2H3O2, would have to be added to 5.00 L of 0.65 M acetic acid (pKa 4.74) to make the solution a buffer for pH 4.00? I did this but it's not the right answer: 4 =4.74 + log(A/.65) 0.74=log(A/0.65) 10^-0.74= A/0.65 0.182 = A/0.65 0.118= A...

**chemistry**

(0.930atm*0.393L)/(0.0821*298)= 0.0149mol 0.0149mol/0.393L= 0.038 -log(0.038)= 1.42 what did I do wrong?

**social studies (check answers)--Mrs.Sue**

Sorry, i meant number 2 on the last one

**social studies (check answers)--Mrs.Sue**

Number 3 is C:redirection of oil wealth to provide social services.

**social studies (check answers)--Mrs.Sue**

Number 3 is D: the search for fossil fuels.

**Math**

When I did it I got y=3/4x+9 1/2... Did u get that also ?

**Math**

Write an equation in slope intercept form of the line that is perpendicular to the given line and that passes through the given point 3x-4y=8 ; (-6,5)

**Math**

For f(x)=3x+2. Find f(4)

**Math**

A model plane flies 18 ft per 2 seconds. What is the planes speed in miles per hour? Round to the nearest tenth.

**math..help again**

Got it.... Thanks so much!!!

**math..help again**

A photo lab manager graphed the cost of having photos developed as a function of the number of photos in the order. The graph is a line with a slope of 1/10th that passes through (10,6). Write an equation in slope-intercept form that describes the cost to have photos developed.

**math**

So if slope intercept form is y=mx+b what would this equation look like for this word problem? Thanks

**math**

A photo lab manager graphed the cost of having photos developed as a function of the number of photos in the order. The graph is a line with a slope of 1/10 that passes through (10,6). Write an equation in slope-intercept form that describes the cost to have photos developed. ...

**math**

solve for A B=3/8(A-10)

**math**

yes. the equation is c = 6u^2v...solve for v sorry...thanks

**math**

Solve for v: C=6u2v

**Math - please help**

Ling is three times as heavy as her packed suitcase. Her suitcase is 20 pounds heavier than her knapsack. The weights of Ling, her suitcase, and her knapsack total 170 pounds. How much does each weigh? Identify a variable, set up an equation, and solve. Thanks so much

**Math **

Ling is three times as heavy as her packed suitcase. Her suitcase is 20 pounds heavier than her knapsack. The weights of Ling, her suitcase, and her knapsack total 170 pounds. How much does each weigh? Identify a variable, set up an equation, and solve. Thanks so much

**Chemistry Urgent**

Assuming that kerosene is C11H24, calculate the standard enthalpy change when 1 mole of kerosene burns completely in oxygen, using the data below: ΔH of formation of C11H24(l) = -327 kJ mol ΔH of formation of CO2(g)= -394 kJ mol ΔH of formation of H2O (l)= -286 ...

**math **

In new Your a taxi costs 72 cents for the first 1/10th of a mile and 15 cents for every additional 1/10th mile. How much does it cost to drive 6 miles? Set up and solve? I do not understand how you got this answer...can you explain? .72+ .15(6-.1).1 = $9.57 When I work the pro...

**math**

In New York a taxi costs 72 cents for the first 1/10th of a mile and 15 cents for every additional 1/10 mile. How much does it cost to drive 6 miles? Set up and solve? Thanks

**Math**

Julia and Kevin are playing games at the arcade. Julia started with $15, and the machine she is playing cost $.75 per game. Kevin started with $13, and his machine costs $.50 per game. After how many games will these two kids have the same amount of money remaining? Set up an ...

**Chemistry - DrBob222**

It did help. Thank you very much :-)

**Chemistry - DrBob222**

C6H14 + Cl2 in UV light Below are 5 products, say which one cannot be a product, prove this by showing how each of the other products were formed from the equation above. 1-chlorohexane 2-chlorohexane 2,2-dichlorohexane dodecane hex-1-ene

**Chemistry urgent**

C6H14 + Cl2 in UV light Below are 5 products, say which one cannot be a product, prove this by showing how each of the other products were formed from the equation above. 1-chlorohexane 2-chlorohexane 2,2-dichlorohexane dodecane hex-1-ene

**Chemistry Urgent**

1) 30cm3 of methane and ethane mixed with 100cm3 of O2 at RTP. Explosion occurs, on cooling 61.5cm3 remained. Find the percentage by volume of each gas in the mixture 2)32cm3 of a mix of CO2, CH4 and H2 mix with 50cm3 of O2 and exploded after cooling to RTP, volume noted is re...

**teas test**

a population decreases from 404 million to 288 million. what is the percent decrease of the population?

**algebra**

An oil painting is 16 years older than a watercolor by the same artist. The oil painting is also three times older than the watercolor. How old is each? Identify a variable, set up an equation, and solve.

**math**

An oil painting is 16 years older than a watercolor by the same artist. The oil painting is also three times older than the watercolor. How old is each? Identify a variable, set up an equation and solve. thanks

**math**

What is Bobby's number? It is between 15 & 25. If you subtract the tens digit from the ones digit, the difference is 8.

**math**

Robert has three boxes of letters: The first box contains the six letters in the word "bubble" the second box has the three letters in the word "zoo" and the third contains the four letters in the word "taxi". If he randomly selects one letter fro...

**math**

a school's chorus bought 30 tickets to a play. total cost of tickets $98. if student tickets cost $3 and each adult tickets cost $5, how many adults are going with the chorus? thanks

**math**

a CD player currently sells for $80. The owner of the store suggests a 9% increase in the price. What will be the new price of the player?

**social studies**

Which 5 American men are competing in the Skelton event of the 2014 Winter Olympics

**math**

three sisters run a business. they charge $260 for each job. If the oldest sister earns 50% more than the middle sister and if the youngest sister earns 50% less than the oldest sister, how much does each sister earn per job? hint: Identify the variable and then write each sis...

**into computers**

Your boss is considering a BYOD program for your company. He asks you if there are any negatives to such a program. What do you tell him? A. It limits the freedom of the user to access websites and applications. B. It introduces security and control problems. C. It requires mu...

**math**

Jim is putting up fence posts around a rectangular garden. He used 50 posts and placed them 2 feet apart. The length of the garden is 30 feet. What is the perimeter of the garden? What is the area of the garden? thanks

**math**

In a random sample of 150 students, 60 ride the bus to school, 54 ride in carpools and 36 walk. It is predicted there will be 800 students in school next year. How many will need bus transportation?

**math**

Lisa and her father stand next to each other on a sunny day. Lisa is 130 centimeters tall and her father is 200 centimeters tall. Lisa's shadow is 100 centimeters. How long is lisa's father's shadow to the nearest centimeter?

**algebra**

end of season sale for summer clothes advertises 30% to 45% off the original price. What was the highest original price of a swimsuit that is now on sale for $12.99? What was the lowest original price?

**chemistry**

Iron reacts with chlorine to form iron(iii)chloride. A)How many chlorines react with 1.86g of iron? B)What mass of iron(iii)chloride is produced?

**Chemistry- DrBob222**

I completed this question like you told me to. Are the answers correct? Is my method for finding the molecular formula correct? 2.4g of a compound of carbon, hydrogen and oxygen gave on combustion, 3.52g of CO2 and 1.44g of H2O. The relative molecular mass of the compound was ...

**CHEMISTRY**

25cm^3 of a solution of NaOH required 28cm^3 of 1.0 mol dm^-3 H2SO4 to neutralise it. a)Write an equation for the reaction. b)How many moles of H2SO4 were needed? c)How many moles of NaOH were thus neutralised? d)How many moles of NaOH are there in 25cm^3 of solution?

**Math**

Whats the answer for 0.15 divided into 0.1845

**english**

It is A, I just did that one on my quick check

**Grammer**

It is a metaphor I just did that quick check :D

**Science**

Please check my answers? My textbook won't load, so i've had to use google and guess. 1. Scientists hypothesize that the sun formed ____. (1 point) less than a billion years ago **from a cloud of gas and dust less than a million years ago from a chunk of Jupiter 2. Two...

**Science**

. You and your friend are walking along a beach in Maine on January 15, at 8:00 am. 2. You notice a thermometer on a nearby building that reads -1 degrees C. 3. You also notice that there is snow on the roof of the building and icicles hanging from the roof. 4. You further not...

**Science**

Ms. Sue this is Ava will you please check my science answers that i posted

**science**

Ms. Sue the answer to the previous question are # 5 problem #7 hypothesis # 8 experiment and #6 data

**science**

#5 states a problem #7 states hypothesis #8 describes an experiment #6 contains data information

**science**

Analyzing Elements of a Scientific Method Read the following statements and then answer each question below. 1. You and your friend are walking along a beach in Maine on January 15, at 8:00 am. 2. You notice a thermometer on a nearby building that reads -1 degrees C. 3. You al...

**Science**

Sponge Bob notices that his pal Gary is suffering from slimotosis, which occurs when the shell develops a nasty slime and gives off a horrible odor. His friend Patrick tells him that rubbing seaweed on the shell is the perfect cure, while Sandy says that drinking Dr. Kelp will...

**physics**

A balloon of total mass 840 kg is rising vertically with constant speed. As a result of releasing some ballast, the balloon immediately accelerates at 0.5 m/s². Calculate the mass of the ballast released.

**pre algebra**

Application of percent Alice earns a monthly salary of $315 plus a commission on her total sales. Last month her total sales were $9640, and she earned a total of $1182.60.What is her commission rate?

**fractions**

ShayLea said that if you multiply the numerator and denominator of a fraction by the same number,you get an equivalent fraction. Is this true? Why or why not? Me and my dad do not know. Please send answer tonight!!!

**Math**

What is the median: 25, 23, 23, 22, 19, 18, 16, 16, 15, 10, 9?

**College English**

Can someone explain to me the second and third stanzas? She rose to His Requirement By Emily Dickenson She rose to His Requirement, dropt The playthings of her life To take the honorable work Of woman, and of wife. If ought she missed in her new day Of amplitude, or awe, Or fi...

**4th grade science**

In classifying living things, what is the smallest group that has only one type of organism?

**human services**

how do human service workers use mediation

**Algebra 2**

Can someone please help me? Use the rational exponents to simplify. 5 sqrt x^20 would the answer be 5?

**Algebra**

Can someone please help me with this problem? I can not figure it out. Thank you. solve 4x + x(x-1)=0, find the x-intercepts of f(x)=4x+x(x-1)

**Albegra**

I need to know if my answer is correct for the following two problems. 3 squared 189 divided by 3 squared 7 = 27 problem #2... 9 3 squared 3 - 2 3squared 3 = 5 Please let me know if these are correct. thanks for all your help.

**Albegra**

I need to know if my answer is correct for the following two problems. 3 squared 189 divided by 3 squared 7 = 27 problem #2... 9 3 squared 3 - 2 3squared 3 = 5 Please let me know if these are correct. thanks for all your help.

**Albegra**

I need to know if my answer is correct for the following two problems. 3 squared 189 divided by 3 squared 7 = 27 problem #2... 9 3 squared 3 - 2 3squared 3 = 5 Please let me know if these are correct. thanks for all your help.

**Exponents**

I need to know if i answered this right. Use the laws of exponents to simplify. 3^3/4 * 3^1/8= 81/32

**Radical exponents**

Use rational exponents to write 4suare root 5 * 2 sqaure root 8 Please help.. I can't find the square root button

**Physics**

Mammals that depend on being able to run fast have slender lower legs with flesh and muscle concentrated high, close to the body. On the basis of rotational dynamics, explain why this distribution of mass is advantageous.

**algebra**

write an equation in slope-intercept form for the line that satisfies the following condition. Pass through (11, -15) & (16, 5)

**critical thinking**

Categorize each fallacy statement by copying fallacy type from the list below into the Fallacy Type ext box adjacent the fallacy statement. Provide an explanation as to why you think it is that fallacy type in the Why it is this fallacy type text box adjacent the fallacy state...

**medical**

Thanks. What are online activities that I can do when I'm at home for medical. And can you please give me some websites?

**medical**

Thanks. What are online activities that I can do when I'm at home for medical. And can you please give me some websites?

**medical**

Thanks. What are online activities that I can do when I'm at home for medical. And can you please give me some websites?

**medical**

Thanks. What are online activities that I can do when I'm at home. Rather than going outside. And can you please give me some websites?

**medical**

Hi my name is Ava and I'm in 6th grade. I want to go in the field of medical can you please tell me some pepration methods Ican use in this age? please=]

**English **

I need help paraphrasing this poem? If thou wilt mighty be, flee from the rage Of cruel will, and see thou keep thee free From the foul yoke of sensual bondage; For though thy Empire stretch to Indian sea And for thy fear trembleth the farthest Thylee, If thy desire have over ...

**calculus**

The curve below is called a witch of Maria Agnesi. Find an equation of the tangent line to this curve at the point (-2, 1/5). y=1/(1+x^2)

**Calculus**

nevermind i got it

**Calculus**

a)(pi)n, where n is any integer b)(pi)/2 + (pi)n, where n is any integer c)0 d)n(pi)/2, where n is any integer

**Calculus**

Locate the discontinuities of the function. y = ln(tan(x)2) a)(pi)n, where n is any integer b)(pi)/2 + ðn, where n is any integer c)0 d)n(pi)/2, where n is any integer

**Chemistry**

My profesor says that b and e are true but c is also true. The reaction will shift toward the right with a temperature increase because it is endothermic. I did type in bce before but because the computer said it was incorrect I changed my answer. :( It is too late to fix it n...

**Chemistry**

My profesor says that b and e are true but c is also true. The reaction will shift toward the right with a temperature increase because it is endothermic. I did type in bce before but because the computer said it was incorrect I changed my answer. :( It is too late to fix it n...

**Chemistry**

Haha yes he probably will. I will let you know.

**Chemistry**

no I've entered b and e several times before into the computer (and now again) for the correct question so now I am going to email my instructor, thank you

**Chemistry**

I just fixed the equation above but here it is again 2NOBr <-> 2NO + Br2 (delta)H = +61.1 kJ I thought b and e are true however the computer keeps saying that answer is wrong.

**Chemistry**

oops the reaction should be 2NOBr <-> 2NO + Br2 (delta)H = +61.1 kJ

**Chemistry**

. For the gas reaction at low pressure 2NOBr ¡ê 2NO + Br2 ¥ÄH = +61.1 kJ which of the following statements are true? a) Adding more Br2 shifts reaction to the right b) Removing some NOBr shifts reaction to the left c) Increasing temperature shifts reaction...

**chemistry**

. For the gas reaction at low pressure 2NOBr ↔ 2NO + Br2 ΔH = +61.1 kJ which of the following statements are true? a) Adding more Br2 shifts reaction to the right b) Removing some NOBr shifts reaction to the left c) Increasing temperature shifts reaction to the righ...

**Chemistry**

thanks! yes it is I figured it out, it's (1/11000)^3

**Chemistry**

In the gas phase reaction CH4 + H2O → CO + 3 H2 At T = 1500 K , Kp = 11000 Calculate Kp, T = 1500 K , for the following reaction 3 CO + 9 H2 → 3 CH4 + 3 H2O .

**Chemistry**

The first two columns are initial concentrations of [CH3COOH(g)]and [C2H5OH(g)]and the third is equilibrium concentration of [CH3COOC2H5(g)]. Each row is a different experiment so that's why there are 3 sets of values.

**Chemistry**

The following table contains data for the equilibrium reaction CH3COOH(g)+ C2H5OH(g)↔ CH3COOC2H5(g)+ H2O(g) T = 100oC. Each row in the table represents a different experiment (diffferent intial concentrations). Initial concentration Equilibrium concentration ------------...

**acc math Ripley Elementary School **

420x2= and estimate by rounding to the largest place:4587 -2695

**math**

how does the lower quartile of the data compare to the least value of the set? #s=97,88,59,68,57,38,34,25,29,28 i dont understand the questionn help is needed. thanks!

**Physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 38.0 above the horizontal. You can ignore air resistance. Calculate the horizontal distance from the base of the building to the point where the rock strikes th...

**physics**

I did it the way that you said: Vx=17.8 Vy=16.1^2 + 2(-9.8)(10m) Vy=63.21 Vf=316.84+3994.24=65.65 but i still got the answer wrong

**physics**

A man stands on the roof of a 10.0 -tall building and throws a rock with a velocity of magnitude 24.0 at an angle of 42.0 above the horizontal. You can ignore air resistance. Calculate the magnitude of the velocity of the rock just before it strikes the ground.

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