Wednesday
April 16, 2014

Posts by blair


Total # Posts: 120

Chemistry
A mixture of nitrogen gas and hydrogen gas reacts in a closed container to form ammonia gas. The reaction ceases before either reactant is completely consumed. At this stage the container has 3.0 mol each of all three gases; nitrogen, hydrogen and ammonia. How many moles of hy...

MATH- Algebra 2
x^2-6>-5x 6x^2-5x+1<0 Solve (using any method), write your answer in interval notation and graph the solution set.

MATH- Algebra 2
Solve each quadratic in form equation. 1. 4y^4+9=13y^2 2. x-3x^1/2+2=0 3. (x-5)^2+2(x-5)-35=0 4. (x-2)^2-3x-2)+2=0 5. 2(x^2-5)^2-13(x^2-5)+20=0 6. 2x^2/3+5x^1/3-6=0 7. 6x^2/3-5x^1/3-6=0 8. x^-2+4x^-1=12 9. x^4-8x^2+7=0 10. x^4-2x^2-35=0 can someone please help?

MATH- Algebra 2
Solve the Given Equations 1. 5/2y+6+1/y-2=3/y+3 2. 5/a-5-1=a/a-5 3. 2/x^2+x-12-6/x+4=2/x-3 4. 65-n/n=4+5/n 5. a/a-2+2/3=2/a-2 6. x-1/3+x+2/4=1/6 7. 5/3x-1/9=1/x 8. 3/3x-2=4/2x+1 9. 3/x+3-1/x-2=5/2x+6

Math
Solve each quadratic in form equation. 1. 4y^4+9=13y^2 2. x-3x^1/22=0 3. (x-5)^2+2(x-5)-35=0 4. (x-2)^2-3x-2)+2=0 5. 2(x^2-5)^2-13(x^2-5)+20=0 6. 2x^2/3+5x^1/3-6=0 7. 6x^2/3-5x^1/3-6=0 8. x^-2+4x^-1=12 9. x^4-8x^2+7=0 10. x^4-2x^2-35=0

chemistry
A photon interacts with a ground state electron in a hydrogen atom and is absorbed. The electron is ejected from the atom and exhibits a de Broglie wavelength of 5.908×10−10 m. Determine the frequency (in hz) of the interacting photon.

to ms.sue
ok.thankyou soooooo much

to ms.sue
can you give me ideas. not websites

pleeeeeeeeeese
im writing a speech about hoola hooping can you help me and give me 5 ideas. and if u want give me more.

english
THANK U SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO MUCH FOR THE INFORMATION MS.SUE

english
i am writing a speach . and i need your help to give me 15 ideas .the speach is if i ruled the world . (tell me your ideas)

Religion
yes

english
how many musicians in a quartet?(5, 6,or 7)

life oriantation
plant trees.smoke free. instead of using a car u could use bikes or scooters.

english
i need help finding jokes for my talent show

english
is their any such things as a sklekion bird that talks.

URGENT!! Chemistry HELP!!
Use standard enthalpies to calculate Triangle H for: 2C2H5OH (I) + O2 (g) -> 2CH3CHO (g) + 2H2O (I)

chemistry
mols HCl= molsNaOH?

chemistry
how do you determine the L NaOH?

chemistry
72.33 mL of 0.137 M HCl was added to an Erlenmeyer flask and is titrated with 0.165 M NaOH. Calculate the pH when 5mL of NaOH is added after the equivalence point has been reached.

chemistry
A 3.555 g sample of a monoprotic acid was dissolved in water. It took 23.32 mL of a 0.875 M NaOH to neutralize the acid. Calculate the molar mass of the acid.

chemistry
it doesn't say. That's all that is asked.

chemistry
Calculate the pH when 75.20 mL of 0.114 M HCl is titrated with 0 ml of 0.108 M NaOH

chemistry
Calculate the pH when 75.20 mL of 0.114 M HCl is titrated with 0 ml of 0.108 M NaOH

chemistry
A 3.555 g sample of a monoprotic acid was dissolved in water. It took 23.32 mL of a 0.875 M NaOH to neutralize the acid. Calculate the molar mass of the acid.

chemistry
72.33 mL of 0.137 M HCl was added to an Erlenmeyer flask and is titrated with 0.165 M NaOH. Calculate the pH when 5mL of NaOH is added after the equivalence point has been reached.

social studies - 2nd grade
i have a test tomorow . so can you help me ? thank you.

social studies - 2nd grade
how do people change the environment? How do people change my community? i have a project on this can you please help me? thank you

Trigonometry
tan^2(x)=-3/2sec(x)

Trigonometry
When I solved this out I got x=-32/12 and x=1/4. Is this right?

Trigonometry
4+29sin=12cos^2 How do you determine this

Physics
When the dried up seed pod of a scotch broom plant bursts open, it shoots out a seed with an initial velocity of 2.2 m/s at an angle of 60.0° above the horizontal. If the seed pod is 0.8 m above the ground, how long does it take for the seed to land? (Neglect air resistanc...

chemistry
First of all, the density makes no sense without units. Secondly, you should only specify the amount of something present in one way. The questions gives two: (1) a molarity and a volume. (2) a percentage (by volume or by mass?) and a density. So you can't solve such a que...

US History
Hello! I have an assignment where I have to rewrite the Bill of Rights in modern english. I've been able to do most of them, but I'm stumped on the 9th amendment. "The enumeration in the Constitution of certain rights shall not be construed to deny or disparage ot...

Chemistry
the initial pressure of phosgene gas (COCl2), was 1.31 atm. it was heated, and at equilibrium the pressure of CO was found to be .547 atm. what are the equilibrium pressures of Cl2 and COCl2? CO +Cl2=COCl2 i've done it twice and keep getting the wrong answer

physics
A 0.25 kg ball is thrown straight up into the air with an initial speed of 20 m/s. Find the momentum of the ball at the following locations.

physics
An 8.00 g bullet is fired into a 160 g block that is initially at rest at the edge of a table of 1.00 m height. The bullet remains in the block, and after the impact the block lands d = 2.1 m from the bottom of the table. Determine the initial speed of the bullet.

Chemistry
how to determine the change in the number of moles of gas in the reaction 2H2 g + O2 g= 2H2Ol i thought it was 2 because the product is a liquid but that isn't correct

physics
A beam of microwaves with = 0.7 mm is incident upon a 12 cm slit. At a distance of 2 m from the slit, what is the approximate width of the slit's image?

Chemistry
How many moles of solute particles are present in 1 L of aqueous 0.08 M ethanol (C2H5OH)?

physics
While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 245 m east, 210 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.

Maths
almudena has cut three quarters of a rope to 3 m in length and daniel has cut 3 / 5 of another of 4 m. ? which of the two pieces are longer

Economics
What types of resources do you believe would be inelastic within the construction industry? Explain. Would you consider the elasticity of demand for oil to be elastic or inelastic?

math
evaluate the expression (-7)-8

language
sorry Ms. Sue, i couldn't find my glasses. living room and knicknacks, i'm not sure about this one. vacuumed /verb dusted / verb piano . noun?

language
thank you Ms. Sue, my new sentence is Leanna, vacuumed the living room and dusted the knicknaks on the piano. Please diagram the adjective modifiers. Thank you.

6th grade language
please help.diagram the adjective modifier in this sentence. The red tuplis and yellow daffodils are pretty. thanks

math
no, actually I'm wrong

math
31.275lb

Social Studies
Individuals elected by the people to represent them.

Social Studies
Did Rome start as a city on the Italian Peninsula?

Social Studies
What is one freedom that American democracy has today that was clearly not recognized in the Roman Empire?

Social Studies
Why do you suppose some of Rome's citizens wanted absolute rulers instead of elected senators?

Math
Kalvin wants to eat Coco blast but his mom doesn't want him to because it's to sugary.So, Kalvin decides to flip a penny. Every time he gets a head he eats coco blast, and every time he gets tails he doesn't. Later on he found out it did not help b/c it was a 50% c...

correct punctuation
One thing that happened over the summer, I grew. Grim takes a look at me one day and he goes, "all that walking you do, it must be stretching your legs, and carrying poor Kevin around that seems to be putting real muscle on you." He's not that heavy, and anyhow i...

grammar
One thing happened over the summer, I grew even more. Grim takes a look at me one day and he goes, "all that walking you do, it must be stretching out your legs, and carrying poor Kevin around that seems to be putting real muscle on you. He's not that heavy, and anyho...

grammar
punctuation of passage. one thing that happened over the summer i grew even more grim takes a look at me one day and he goes all that walking you do it must be stetching out your legs and carrying poor kevin around that seems to be putting real muscle on you

physics
A 2.00 kg aluminum block and a 5.20 kg copper block are connected by a light string over a frictionless pulley. They sit on a steel surface, where θ = 28.0°. Determine the sum of the magnitudes of the forces of friction acting on the blocks.____________...

physics
A 1.30 kg toaster is not plugged in. The coefficient of static friction between the toaster and a horizontal countertop is 0.400. To make the toaster start moving you carelessly pull on its electric cord. (a) For the cord tension to be as small as possible, you should pull at ...

Biology
Which is the most common complex carbohydrate on earth? A. Starch B. Glycogen C. Cellulose D. Hemicellulose E. Chitin

Biology
Which monosaccharide requires the most steps to proceed through glycolysis? A. Glucose B. Galactose C. Fructose

Biology
Anaerobic fermentation in yeast produces (include all of the final products). A. Lactic acid, NAD and CO2 B. Lactic acid and NADH C. Lactic acid, NADH and CO2 D. Lactic acid and NAD E. Ethanol and CO2 F. Ethanol, NADH and CO2 G. Ethanol, NAD and CO2 H. Acetaldehyde and NADH

physics
In an Atwood machine m1 = 2.00 kg and m2 = 6.50 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that sets it into motion at vi = 2.20 m/s d...

physics
A block is given an initial velocity of 1.00 m/s up a frictionless 25.0° incline. How far up the incline does the block slide before coming (momentarily) to rest? Please help! Thanks!

Biology
The reason you might see fewer colonies on your LB/Amp/Arabinose + plate (compared to the number of colonies..? The reason you might see fewer colonies on your LB/Amp/Arabinose + plate (compared to the number of colonies that you see on your LB/Amp + plate) is because? a. UV l...

physics
Vroom-vroom! As soon as a traffic light turns green, a car speeds up from rest to 50.0 mi/h with a constant acceleration of 8.40 mi/h·s. In the adjoining bike lane, a cyclist speeds up from rest to 20.0 mi/h with a constant acceleration of 11.5 mi/h·s. Each vehic...

physics
A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.8 m/s at ground level. Its engines then fire and it accelerates upward at 3.90 m/s2 until it reaches an altitude of 920 m. At that point its engines fail, and the rocket goes into ...

physics
1st car =8.6/2.05 m/s =4.195m/s 2nd car = 8.6/1.73 m/s =4.971 m/s 4.971-4.195= 0.776m/s a= delta V /delta T (0.776m/s ) /0.32s= 2.44 m/(s^2) That answer isn't correct. This is what I did initially and I'm stumped on this question. Please let me know if there's anot...

physics
Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 m long. The first moves past her in 2.05 s and the second in 1.73 s. Find the constant acceleration of the train. _____m/(s^2) Please explain this...

physics
A student throws a set of keys vertically upward to her sorority sister, who is in a window 4.30 m above. The keys are caught 1.30 s later by the sister's outstretched hand. (a) With what initial velocity were the keys thrown? _____________ m/s upward (b) What was the velo...

Organic Chemistry
What is the name of the product made from acetone and 4-methylbenzaldehyde in an aldol condensation?

biology
What is the role of Frc-2,6 bis phosphate in Glycolysis and Gluconeogenesis?

biology
What is the role of Frc-2,6 bis phosphate in Glycolysis and Gluconeogenesis?

Organic Chemistry
What product is expected from the reactino of fumaric acid (trans-2-butenedioic acid) with 1,3-butadiene?

Organic Chemistry
Benzene is often produced as a by-product during the synthesis of phenylmagnesium bromide. how can its formation be explained? Write a balanced chemical equation for the formation of benzene.

organic chemistry
If, by mistake, a chemist used 100% ethanol rather than diethyl ether as the reaction solvent, would the Grignard synthesis still proceed as expected?

Organic Chemistry
Write an equation for the reaction that occurs in the gas trap between SO2 and NaOH.

Organic Chemistry
List the following compouns from highest to lowest frequency. Cyclohexanone, 2-cyclohexenone, cyclohexanecarbaldehyde

Organic Chemistry
The reaction of (Z)-butenedioic acid with 1,3-cyclopentadiene gives only one product. Why?

Organic Chemistry
How could you distinguish between cyclohexane and cyclohexene using Infrared Spectroscopy only? How could you distinguish between 1-hexene and 1-hexyne using IR only?

Chemistry!! Please Help!
THANKS! I know what I was doing wrong! I didn't find the pOH I just did 10^-9.65 trying to find x! I understand now! Thanks so much! -B

Chemistry!! Please Help!
A 0.285 M solution of the sodium salt, NaA, of the weak monoprotic acid, HA, has a pH of 9.65. Calculate Ka for the acid HA. I think I am having issues with the equation and then the math part. I figured out what 'x' was from the pH, which I believe is 2.2x10^-10, but ...

Ochemistry
Suggest an appropriate reducing reagent for the following substrates and predict the product of the reactions : (a) 2-hexanone (b) ethyl 4-nitrobenzoate (reduction of the nitro group) (c) hexanal Would NaBH4 work for all of them ? Please help !

Ochemistry
4-chlorophenol is insoluble in water. Explain why 4-chlorophenol dissolves in 2.5M aqueous NaOH solution. -Besides NaOH being a strong base and a great nucleophile is there any other reason ?

chemistry-help
Why does an organic mixture being distilled using steam distillation never rise above 100 degrees Celsius?

chemistry
Oh it is, but same idea.

chemistry
An optical rotation study gives result of +140 degrees. Suggest a dilution experiment to test whether the results is indeed +140 degrees, not-200 degrees. THANK YOU!

chemistry HELP PLEASE !
Thank you!

chemistry HELP PLEASE !
A solution consisting of isobutyl bromide and isobutyl chloride is found to have a refractive index of 1.3931 at 20oC. The refractive indices at 20oC of isobutyl bromide and isobutyl chloride are 1.4368 and 1.3785, respectively. Determine the molar composition (in percent) of ...

Humatn Resource
Does "Pay for performance" fall under the category of "Compensation and Benefits"?

Human Resources
I asked this question before, I asked what are some good "Compensation and Benefits" discussion topics? And people gave me a lot of ideas: Higher wages Flexible hours Work at home Increased health care benefits Benefits for same-sex partners Benefits for opposite-sex...

Human Resource
What are some good "Compensation and Benefits" (from a HR point of view) discussion topics? It doesn't have to be a broad topic, it could be a specific one. Thank you in advance!

chem
In the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water, the oxidizing agent is____. Is it hydrogen peroxide?

Chemistry
The standard solution of FeSCN2 (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.550. If a trial's absorbance is measured to be 0.350 and its initial concentration of SCN– was 0.0010 M, the equilibrium concentration...

Chemistry
The solubility of borax is directly proportional to temperature. Therefore, the sign of H is A. negative B. positive

chemistry
lol webwork.

Chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. B. dependent on the mass of solute present. C. independent of the chemical i...

Chemistry
The molarity and the molality of a solution prepared by dissolving 2.00 g of ethanol C2H5OH with 99.0 g of water to give a final volume 101 mL are ______Molarity and _______molality. How do I do this?

Chemistry- HWK CHECK
1. A solution in which no more solid can be dissoved is referred to as ____. Answer: saturated 2.At constant pressure, heat can be referred to as (entropy, enthalpy, or free energy). Answer: enthalpy The measure of disorder or randomness of a system is(entropy, enthalpy, or fr...

Chemistry
The freezing point of a solution is A. lower than the freezing point of the solvent alone because higher temperature is required to accelerate solvent molecular motion enough to overcome obstructon by solute particles.. B. lower than the freezing point of the solvent alone be...

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