Thursday

April 17, 2014

April 17, 2014

Total # Posts: 651

**Chemistry**

how many ions and moles does 113 mL of .490 M aluminum chloride have?

**Chemistry**

Is C12H22O11 soluble in water and is it ionic or a acid?

**Chemistry**

a mixture of .0285g of H and .0141 mol of oxygen in a closed container is sparked to initiate a reaction. How many grams of H2O can form?Which reactant is in excess and how many grams remain?

**Math**

Ramon planted 3 rows of seeds. He put 8 seeds in each row. Each row of seeds was 42 inches long. How far apart did Ramon plant the seeds?

**Business Communication**

I think the answer might be d.

**math **

jill has four of her five game scores: 8 6 6 3 her average score for the five games is 6 points. what is the fifth game score? write an equation to help solve the problem.

**algebra**

what is the exponent of 289

**Math**

Everyone in Mrs. Bowman's art class has 8 jars of paint ecept Jerome, who has 10. There are 74 jars of paint in the room. How many students are there in Mrs. Bowman's art class?

**Physics**

A pitcher throws a baseball horizontally from the mound to home plate. The ball falls 0.995 m (3.26 ft) by the time it reaches home plate 18.3 m (60 ft) away. How fast was the pitcher's pitch?

**Physics**

A pitcher throws a baseball horizontally from the mound to home plate. The ball falls 0.995 m (3.26 ft) by the time it reaches home plate 18.3 m (60 ft) away. How fast was the pitcher's pitch?

**Math**

You have a 4inch by 6inch notecard and you intend to make a triangle out of the notecard by using one long side (call it AB) as the base of your triangle and by then placing the third vertex (point E) somewhere on the opposite side (call it CD). Where should you place point E ...

**Chem 151**

A solution of ammonia and water contains 3.50×10^25 water molecules and 5.00×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?

**statistics**

write a data set that fits the following description. there are 7 numbers in the data set the minimum is 17 the range is 45 the median is 32 the mode is 41

**math**

The city is planning to install streetlights and wants five lights along a walkway of 60 yards. If there is a light at the beginning and at the end of the walkway and the lights are evenly spaced, what is the distance between each light

**Chemistry**

Dinitrogen tetroxide decomposes to nitrogen dioxide: N2O4 (g) ---> 2NO2 (g) Delta H rxn: 55.3 kJ At 298 K a reaction vessel initially containing .100 atm of N2O4. When equilibrium is reached, 58% of the N2O4 has decomposed to NO2. -What percentage of N2O4 decomposes at 350 ...

**Chemistry**

Consider the rxn during the Haber Process: N2 + 3H2 ---> 2NH3 The equilibrium constant is 3.9 x 10^(5) at 300 K and 1.2 x 10^(-1) at 500 K. Find Delta H reaction and Delta S for reaction

**Chemistry**

How many grams of Ba(OH)2 must be added to 2.37L of water to make a saturated solution? I got 2.03 grams. Is this correct?

**chemistry**

Ok, I set up the ICE table and found that Ksp of Ni(OH)2 is 5.48x10E-16. 5.48x10E-16=4S3 S=5.16x10E-6 Molar Now when you said convert this to grams I'm confused because the problem gives to the amount of grams used. I appreciate the help.

**chemistry**

A student adds .137 grams of nickel(II) hydroxide powder to 10.0 L of distilled water at 25C with vigorous stirring. Did all of the powder dissolve? If not, how much powder remains undissolved? If so, how much more powder can be dissolved before a saturated solution is reached...

**science**

which of the following absorbs hear from the surroundings as it proceeds to completion? 1. CO(g)+1/2 O2 (g)=CO2 (g) 2.AL2O3(s)=2 Al(s) + 3/2 O2 (g) 3.SO3 (g) + 99.2kJ=S (s)+3/2 O2 (g) Hrxn = -283.0 kj (endothermic)

**math**

Determine the equation of joint variation. Then solve for the missing value. x varies directly with y and z. x = 400 when y = 8 and z = 10. Find x when y = 10 and z = 12.

**physics**

What amount of energy is used if 800 C of charge passing through a load with a potential difference of 120 v? answer is 9.6e+4

**Chemistry**

126

**physics **

I think it was a joke man.. throwing a "physics book off a cliff" because its physics.. aha..ha..?

**arithmetic**

Write the nth term of the following sequence in terms of the first term of the sequence. 10, 20, 40, . . .

**Chemistry**

Thanks Dr Bob! You da man!

**Chemistry**

Thanks Dr. Bob! Along those same lines. Which of the following compounds have more than one isomer? PtCl5NH3, Co(NH3)4Cl2, Pt(CO)2Cl2, Rb3[Cr(CN)6] Thanks!

**Chemistry**

Two isomers have the same formula but different structures: Co(H2O)5SCN, CO(H2O)5NCS. The 5's mean 5-H20's. Draw each of these structures and explain the difference between the two? I don't even know where to begin. I appreciate any kind of help at this point. Thanks!

**Chemistry**

What is the total energy transfer(in KJ) when 10.00 pounds of water vapor at 110 degrees C becomes ice at 253K? Assume that the specific gravity of water = 1.00. The answer I got was around 12,000 KJ. Is this correct?

**math**

I always thought it was funny how when your younger, they prohibit the use of calculators, only to make it so when you get into Algebra 2 and higher, you HAVE to have a calculator. Aha, just think thats amusing.

**Chemistry**

Also shouldn't there be another phase involving the Cs of ice where the ice is cooled down to the 253k?

**Chemistry**

In q1, did you mean to say (110-100)? I did it assuming that and after I added all the q values I got 13,759.78 KJ as my answer. Is that correct?

**Chemistry**

What is the total energy transfer(in KJ) when 10.00 pounds of water vapor at 110 degrees C becomes ice at 253K? Assume that the specific gravity of water = 1.00.

**Chemistry**

Yeah thats the same setup I have but I'm not sure once I divide 30800/8.314 if I take that number and multiply by the other side of the equation or if I'm supposed to FOIL it out with the temps in parenthesis? Thanks!

**Chemistry**

Thanks Dr. B, I know to use that equation but the math is the part that I'm stuck on.

**Chemistry**

The normal boiling point of benzene is 80 degree C and its heat of vaporizations is 30.8 kj/mol. What is its boiling point at the top of Pikes Peak where P=260 mmHg?

**science**

b. mountains

**Geometry**

The scale factor for two similar triangles is 4 : 3. The perimeter of the smaller triangle is 12. What is the perimeter of the larger triangle?

**physical Science**

Explain why a ceramic bowl will keep oatmeal hot longer than a stainless steel bowl?

**trig.**

69

**Sociology**

What do you think they are?

**Sociology**

Oh I am sorry!! I think It goes but I am not sure! 1. D 2. D 3. A 4. C 5. D

**Sociology**

I need help with these homework questions!! 1. if a young person aspiring to a career in environmental issues joins professional society he or she should be engaging in: a. primary group behavior b. cliques c. anticipatory socialization d. none of the above 2. the variable of ...

**Math**

What is the volume of a rectangular solid that measures 16 ft by 14 ft by 20 ft?

**Chemistry**

NF3 and PF5 are stable molecules. Write the electron-dot formulas for these molecules. On the basis of structural and bonding considerations, account for the fact that NF3 and PF5 are stable molecules but NF5 does not exist

**Algebra**

why is 5^0=1 Not understanding it. also can you explain when (-3)^n is positive and when it is negative.

**chem 1**

Using equation: 2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2O Question: How many molecules of H2O can be made from 9.21 x 10^22 molecules of H2SO4?

**high school chem 1**

Equation: 4NH3(g) + 5O2(g) -> 4NO(g) + 6H2O(g) question: What volume of NH3 is needed to react with 71.6 liters of oxygen?

**High School chem 1**

2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2) Question: How many molecules of H2O can be made from 9.21 x 10^22 molecules of H2SO4?

**High school chem 1**

Hi I put the wrong equation up should read 4NH3(g) + 5O2(g) -> 4NO(g) + 6H2O(g) Question then is what mass of H2O is produced from 350 liters of NH3?

**High school chem 1**

4NH3(g) + 5O2(g) -> 4NO(g) + 6H20(g) what mass of H2O can be produced from 350 liters of NH3?

**high school chem 1 **

The above equation has the wrong question attached it should read: How many molecules of H2O is made from 9.21 x 10 (to 22nd power) molecules of H2SO4?

**high school chem 1 **

2Fe(OH)3 + 3H2SO4 -> Fe2(SO4) + 6H2) How many molecules of H2O can be produced from 350 liters of NH3?

**math**

an experiment consists of rolling a fair die until it lands on two. What is the probability that it will land on at least two is

**geometry**

the angle of depression from d to f measures 10 degrees. if df equals 300m, find df. round to the nearest tenth.

**Lit/chem**

What is a acrostic for the element cesium

**physics!**

A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum and collect at the b...

**math**

how do I work the problem d=3.5t

**Science**

A block of ice of mass M is pulled horizontally with a steady force P against a force of friction F I have to write an equation for the acceleration of the block.

**calculus**

Consider the function below. f(x) = 4x2 - 5x (a) Find f '(2). (b) Use the answer in part (a) to find an equation of the tangent line to the parabola y = 4x2 - 5x at the point (2, 6). y =

**English**

So basically one can interpret it as early understand/hint while the inklings can be interpreted as ink relating to writing pen and ink?

**English**

Early Inklings Short Essay by John Updike. The title, â€œEarly Inklingsâ€ is an example of a pun (a witty play on words that suggest a double meaning) . Explain the pun and the meaning of the title. I don't even know where to start... Also,...

**MAth**

Find the critical numbers, increasing intervals, x-values where f has an inflection point, and where the graph is concave down from the equation f(x)=2x^4-3x^3-10x^2+20

**math - algebra**

Fran, Dan, and Stan have a total of 194 cards. Fran has 24 more than Dan, but 35 less than Stan. How many do each of them have? I don't know how to set this up. Thanks.

**MATH**

Dan, Fran, and Stan have 194 cards. Dan has 24 less than Fran, and Stan has 35 more than Fran. How many do each of them have?

**Math**

Yeah probably, I also dont remember if it was 20435 or 20425 exactly, but it was approximately that.

**Math**

okay, good, I think i did it right then (it was actually a question on my exam that I just completed, it was the only question I was unsure about)

**Math**

A university is doing a study to record the growth of mosquitos. There is originally 25 mosquitoes. The growth of the mosquitos is 0.03% every 7 days. How many days until there are 20 435 mosquitos? What I did was use the growth formula A=25(1+0.03)^t to figure out how many mo...

**MATH**

The sides should be proportional if they are similar, thus, since AB corresponds with wx, and Ab is 24 while wx is 16, 24/16=1.5 . So ABCD is 1.5 times bigger than wxyz. the other side is 30, CD, is 1.5x bigger than yz, so find that and get the area by multiplying. or u can do...

**Chemistry**

Could someone help me with this question? A vinegar sample was analyzed and found to be 5.88% acetic acid by volume. The density of pure acetic acid is 1.409g/ml. What volume of 0.200 M NaOH would be required to titrate a 2 ml aliquot of this vinegar.

**Math/Trig**

Is the answer y = 21.15sin(pi/6 t + 3)+66.25?

**us history**

I know i'm a year late but you can talk about how the government subsidized loans and granted land to companies

**MATH**

yes thank you

**MATH**

If angle a =22.17 and angle b = 136.5 what is the measure of angle c? Can someone show me how to go about this

**math**

The oldest brother gets half a candy bar extra.

**math**

3 darts, 25+19+6=50

**math**

ABC=495. 495+459=954

**math**

Gina,thank You For your help. I'll Show my work next time. Thanks for your quick feedback.

**math**

Gina,thank You For your help. I'll Show my work next time. Thanks for your quick feedback.

**math**

Gina,thank You For your help. I'll Show my work next time. Thanks for your quick feedback.

**math**

Gina,thank You For your help. I'll Show my work next time. Thanks for your quick feedback.

**math**

I'm a different Tyler WATever

**math**

make up a list of data with the following landmarks: mode:15 minimum:5 median:10 Maximum:20 use at least 10 numbers describe a situation in which these data might actually occur

**science**

how much energy is required to obtain superheated steam at 115 degrees celcius from 25 grams of water at 10 degrees celcius?

**free enter**

true or false the assembly line uses a division of labor

**algebra**

Compute: 7!/6! x 3!2!/(8-1)! express answer as acommon fraction.

**algebra**

how many cubic feet are in the volume of a round swimming pool which is 16 feet in diameter and 4 feet deep throughout? express answer in terms of pi.

**algebra**

six people are going to be seated in a row of 8 chairs. how many different ways may they be seated?

**Algebra**

Four circles with centers A,B,C,and D are mutually tangent. The areas of circles A,B,C, and D are 25pi, 100pi, 16pi, and 225pi respectively. How many units are in the perimeter of quadrilateral ABCD?

**Algebra**

What is the largest perfect square that divides 64,800?

**Algebra**

Find the value of x such that the four-digit number x15x is divisible by 18.

**Grade 11 Physics**

Two kids are on a beach pulling an inner tube. One is pulling at a force of 45N[N] and the other one pulling at 60N[SW]. What is the net force? (I tried to do it by taking the 60N and making a right angled triangle with it, i got 42.43N north and west, then I tried to combine ...

**Chemistry**

Well definately the more levels you have, the bigger the radius will be. However, also, the more electrons you have in that level, the smaller the radius will become. This is because the force of attraction will become greater between the electrons and the protons. Thus, if yo...

**physics**

F=qvB(sinθ) but sinθ=1 so we can ignore it. We have B =1.5T q=1.6x10^-19 We just need v from our Ke. Ke=1/2mv^2 v^2=2Ke/m Punch in 8.0x10^13J and look up the mass of a proton (1.672x10^27) and solve for v, which turns out to be 3.09x10^7. F=(1.6x10^-19)(3.09x10^7)(1....

**PHYSICS PLEASE HELP!!!**

Thank you Bob, but even after reading the article, I still don't understand how to obtain the parallel force acting on the block (question b). Can you expand perhaps?

**PHYSICS PLEASE HELP!!!**

Please someone have mercy this is a test grade and I have no idea what to do ! A force of 200 N is being exerted on a blocki, which has a mass of 10 kg and is on 30 degrees inclined plane. The force is acting up the plane and parallel to it. The coefficient of friction between...

**english**

in the miracle worker what does it mean when helen touches her own cheeks

**physics**

if a 700-kg piano us lifted 4.0 meters in 14 seconds, how much power is developed

**physics**

if a 700-kg piano us lifted 4.0 meters in 14 seconds, how much power is developed

**English**

I wrote a paper on Beloved, now I am required to do a MLA Documented Research Paper on this topic. I am stuck on how to begin with a Thesis Statement (subject and predicate)

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