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December 21, 2014

Search: Chem--PLEASE HELP 911

Number of results: 54,322

Math
solve equation in interval. sec x = -3 - x < the answer is x = -1.911 and 1.911 could someone please write the steps to solving this
September 4, 2011 by Amy

Chem--PLEASE HELP 911
Balance the following redox reaction and identify the oxidizing and reducing agents A- Fe2+(aq) + Cr2072-(aq) -->Fe3+(aq) + Cr3+(aq) (acidic) B- N2H4(g) + ClO3-(aq) -->NO2(g) + Cl- (basic)
April 25, 2013 by JO

English
1. Call 911. 2. Call at 911. 3. Dial 911. 4. Dial at 911. 5. Call me at 123-4567. 6. Dial me at 123-4567. (Which expressions are right?)
March 2, 2011 by rfvv

P.E. help please
Call 911 for A. Hypothermia B. A muscle strain C. A muscle sprain D. Frostbite I'm confused because my book says to call 911 for A and D but it says to call immediatly on A Is it A?
December 3, 2014 by callie

Chem--PLEASE HELP 911
A compound of carbon, hydrogen, and oxygen was burned in oxygen, and 2.00 g of the compound produced 2.868 g CO2 and 1.567 g H2O. In another experiment 0.1107g of the compound was dissolved in 25.0 g of water. This solution had a freezing point of -0.0894 degrees C. What is ...
December 13, 2012 by MSJO

u.s. history
The changes that took place in the U.S. during WW1 and the changes that took place in the U.S. following the attacks of September 11, 2001 ww1: *moved form agricultural to manufacturing society *women started to move into the industry, fighting for the right to vote, and ...
May 22, 2014 by yasminb

Chem
Water is added to 25 ml of a .911 M KNO3 solution until the volume of solution is exactly 500ml. What is the concentration of the final solution.
October 10, 2010 by Jen

P.E. help please
It is important to(blank) thr victim before calling 911 A. Call B. Care C. Check D. Catch Is the answer C?
December 3, 2014 by callie

Chemistry(Thank you for your help!)
The following info was obtained: [HI], M 0.535 0.268 0.134 6.70E-2 seconds 0 520 781 911 What is the average rate of disappearance of HI from t = 0 s to t = 520 s The answer is 5.13E-4 M s-1 but I do not understand how to get this!!!Could someone please explain!! Thank you!!
March 9, 2012 by Hannah

Math Help 911
Which of the following is greater than 4.310^9. A.2.110^9 B.3.210^9 C.5.310^9 D.7.410^8 Is the answer C?
October 9, 2014 by peach

french
Hi I will be traveling to Quebec and I want to know how do you call 911 there? Is it the same number?
June 17, 2008 by Coralia

math
order the numbers form greatest to least 291;911;439;747
August 27, 2012 by shion

chemistry
can you please give me some practical applications of qualitative chem and quantitative chem...
November 26, 2014 by Kara

INB
13. Healthy Foods, Inc. sells 50-pound bags of grapes to the military for $10 a bag. The fixed costs of this operation are $80,000, while the variable costs of the Grapes are $.10 per pound. a. What is the break-even point in bags? $80,000 = $80,000 = 80,808 units $10.00 - $0....
August 1, 2009 by scooby9132002

fin. am I correct?
13. Healthy Foods, Inc. sells 50-pound bags of grapes to the military for $10 a bag. The fixed costs of this operation are $80,000, while the variable costs of the Grapes are $.10 per pound. a. What is the break-even point in bags? $80,000 = $80,000 = 80,808 units $10.00 - $0....
July 31, 2009 by scooby9132002

math
what is 93,042-54,878: what is 153,911-68,099; what is 49,499*5; what is 61,711-30,490; what is 29,038*72; what is 22,675*30
December 9, 2010 by sarah smith

sociology ethnicity
What are the changes in American Policies since 911 towards Muslims and Arabs and the treatment of them?
May 9, 2011 by steve

Physics
Calculate the current in the 240-Ώ filament of a bulb connected to a 120-V line. Power = IV
August 16, 2013 by Tracee

writing
since 911, what are some changes the united states has made to policy concerning arabs and muslims treatment
April 15, 2010 by cam

chemistry
Consider the equation 2kclo3(s) -> 2kcl(s)-1302(g). 3.00-g sample kclo2 is decomposed and the oxygen at 24.0 and 0.982 its either, 911, 304, or 608
June 10, 2014 by kaitlin

chem- drbob222 please help
my original question was: how do i figure this out?? How much heat does your body lose when 2.46 g of sweat evaporates from your skin at 25C? chem - DrBob222, Tuesday, February 22, 2011 at 10:52pm q = mass water x delta Hvaporization. chem - Rebekah, Wednesday, February 23, ...
February 23, 2011 by Rebekah

science Help 911!!
Carbon dioxide is obtained from the air and changed into carbohydrates and oxygen during the process of A. Fossilization B. Respiration C. Digestion D. Photosynthesis Is the answer D? Thanks
November 7, 2014 by Charm

science Help 911!!
Which of the following would likely be part of an ionic bond? Choose two that would apply. A.K+1 B.Cl2 C.F-1 D.Ne Are the answers B,D?
November 14, 2014 by blue

Chemistry
Find the mass of each of the following: (a) 5.52 L O2 at 1.89 atm and 250.0 K (b) 3.43 L NH3 at 0.911 atm and 27C (c) 117 mL SO2 at 0.823 atm and -53C
November 2, 2014 by Sara

math
Im just not sure of this I keep getting confused? (1) Round the following number to the indicated place. 5,911 the nearest thousand. (A)6,000 (B) 5,910 (C) 6,010 (D) 5,900 (2) How do I find the perimeter of a figure
September 24, 2008 by PJ

AP CHEM
A secondary alcohol results from the attachment of a hydroxy group to which carbon atom? C | <---GIVEN STRUCTURE C1-C2-C3-C4 A) C1 B) C2 C)C3 D)C4 Answer is C! I have to explain why, but the teacher never taught us anything about organic chem. So please explain!
April 5, 2013 by Anonymous

science Help 911!!
If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current? A. atomic theory B. atomic model C. atomic number D. carbon cycle Is the answer A?
November 14, 2014 by blue

human biology
A 56 year old obese male is rushed to the ER via ambulance. The EMS team reports he was found non- responsive and in shock. Additionally, they note he has a stiff rigid abdomen and can feel a large lump near the midline. Upon questioning, his wife explained that her husband ...
July 16, 2012 by Michelle

chem
What is another name for cardamist? Please write the formula and a link to its structure. See http://antoine.frostburg.edu/chem/senese/101/consumer/faq/what-is-cardamist.shtml
September 4, 2005 by Nisar

chem help
im doing a graph for chem lab with excel. my classmate created a graph with these coordinates: X: 3.50 X10^-3 3.14X10^-3 3.28X10^-3 Y: -11.7 -8.96 -9.75 They got R2=0.998 but i got y = -3074.9x R = 0.6291 why is it wrong. im desperate please help! screen shot of my graph: ...
October 23, 2010 by ben

math 1 question!!!!!!
Which is the best display for the set of the number of daily 911 calls made during a month, if you want to be able to identify the mode? A. Histogram with intervals of 5<----- B. Histogram with intervals of 3 C. Line plot D. Line graph
June 2, 2014 by Anonymous

chem/science
Please predict what will happen. Im not very good in chem. Iron metal and pb(NO3) Lead metal and Mg(9NO3)2 Copper metal and AL(NO3)3 Lead metal and AgNO3
April 18, 2013 by jim

physics
An object of mass M = 911 g is pushed at a constant speed up a frictionless inclined surface which forms an angle θ = 50o with the horizontal as shown in the figure below. What is the magnitude of the force that is exerted by the inclined surface on the object?
October 14, 2010 by sara

physics
In a rescue scene during the 911 crisis, a helicopter of mass 6000 kg accelerates upwards at the rate of 0.50 m/s2 while lifting a 2500 kg piece of concrete. What is the upward force exerted by the rotors of the helicopter? What is the tension in the cable attaching the ...
June 3, 2014 by grey

Physics
In a rescue scene during the 911 crisis, a helicopter of mass 6000 kg accelerates upwards at the rate of 0.50 m/s2 while lifting a 2500 kg piece of concrete. What is the upward force exerted by the rotors of the helicopter? What is the tension in the cable attaching the ...
June 10, 2014 by Corey Brown

chem -repost for bobpursley
i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...
April 17, 2011 by please, help me

science Help 911!!
In a water molecule, two atoms of hydrogen and one atom of oxygen share electrons. A bond is found in a water molecule. A. ionic bond B. Covalent bond C. chemical bond D. isotope Is the answer B?
November 14, 2014 by blue

Chem
Are: Ba(NO3)2, Ti)2, MgI2, and Ca(CH3COO)2 soluble or insoluble in H2O @ 25degrees C? Here is a site that lists the solubility rules. You should know this table; eventually you will want to know it so well that it is memorized. If you still have questions after viewing this ...
October 20, 2006 by K

algebra
The table below gives the value of a car over two years. Using an exponential best-fit model, after how many years is the car valued at 25% of the original value? Year 0 0.5 1.0 1.5 2.0 Value ($) 15,500.00 14,560.00 13,911.20 12,969.66 12,204.09
July 29, 2014 by clara

chemistry
The valve between a 5 liter tank in which the gas pressure is 911.925 kPa and a 10 liter tank containing gas at 4560 torr is turned open and equilibrium is established at constant temperature. What is the final pressure in the two tanks in atmospheres?
December 5, 2011 by laura

Chem Check Please!!!
Using standard thermodynamic data from Appendix L of your text, calculate the equilibrium constant at 298 K for the following chemical reaction: CO(g) + H2O(l) CO2(g) + H2(g). Show work please! Thank you!!!
March 16, 2014 by Layla

chem
i don't get this at all can you please show me how to do this problem: a sample of oxygen occupies 10.0 L under a pressure of 105 kPa. at what pressure will it occupy 13.4 L if the temperature does not change. please help me set it up
May 14, 2009 by melissa

chem
what are the other practical applications of Analytcal chem on being a medical technologist?
November 26, 2014 by Arielle

math
The deepest part of the Pacific Ocean is Marianas Trenchwith a depth of 10,911 meters,The deepest part od the Alantic Ocean is the Puerto Rico Trench with a depth of 8,648 meters Whatn is the difference in elevation of the two trenches?
May 22, 2013 by kelly

chemistry
When 0.911 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 374C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not round ...
February 25, 2008 by jenivy

chem can u check answer please
the solubility of silver sulfate in water is 0.223%(w/v) at 35 degrees celsius.calculate the solubility product of this salt at this temp. I got 1.46 X 10^-6 M is this right please thanks Andy
May 23, 2010 by Andy

chem
Please help me balance this equation: I just can't get it right. Do you have any strategy you use to solve such equation balancing if so please help me. Ba(ClO3)2(aq)+ Na3PO4(aq)-> Ba3(PO4)2(s)+NaClO3(aq) Thanks alot!!:)
March 18, 2013 by katlyn

chem
Dr Bob please answer below
January 5, 2009 by lyne

Statistics
It's a simple question I am just so confused with this discrete probability distribution. The question is: In the New Jersey Pick 3 game, you pay $.50 to select a sequence of three digits, such as 911. If you play this game once every day, find the probability of winning ...
March 24, 2011 by Norilyn

science Help 911!!
Sodium chloride is formed when atoms lose and gain electrons. Carbon monoxide is formed when atoms share electrons. In both substances, atoms are held together by? A. Ionic bond B. chemical bond C. atomic mass D. proton Is the answer D? Your grandson can wait. Lol
November 14, 2014 by blue

chem
for 2Al2O3----> 4Al(s) + 3O2 the question is what is the heat change for the formation of 1 mol of aluminum oxide from its elements? Al2O3:-1676.0 O2:0.0 Can someone please explain how to complete this problem step by step please??
January 22, 2013 by sara

O-CHEM
Do you expect acetaminophen to be soluble in water? why or why not? please help... thanks
February 3, 2009 by Nina

O-CHEM
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not? please help... thanks
February 3, 2009 by Nina

chem. AP
Please help? How would you convert 300 torr to mm hg?
February 15, 2010 by Cindy

chem
how many atoms of C are in 2 moles of sucrose C12H22O11? please help
March 17, 2010 by suzie

Chem
cr(s)--->Cr^3(aq)+3e- and Pb2+(aq)+2e---->Pb(s) write a balanced equation Please help thanks
May 5, 2013 by Jess

science Help 911!!
You are creating a carbon cycle poster. Which object could you add to the image as another example of combustion of fossil fuels? A. the sun B.a buzzard eating a dead animal C.a person driving a car D.a scientists digging up fossils The picture shows a tree a bunny and fox ...
November 14, 2014 by blue

chem
Ionic bonds and covalent bonds, which one is the stronger. My present teacher said that covalent bond is the strongest one. I learned ionic interaction is the strongest and many chem. books say so. Now i am confused. Is my present teacher right. Please explain this for me, and...
October 5, 2010 by bun

Chem
The experiment is about titration of vinegar with NaOH. Before I start titration, I need to calculate how much of vinegar I will want to be using. I think I might use 50ml of distilled water to mix vinegar and I am gonna drop 3drops of phenolphthalein as indicator. Please help...
October 10, 2010 by Kim

Chem Urgent!
I need help in balancing equation for NO2 + O2 -> NO + O3 Please help...
March 15, 2008 by Lily

college chem
PLEASE..Determine [OH-]of a solution that is 0.270 M in HCO3-...thanks
April 9, 2010 by susy

chem
convert 8.00in^3 to ml please tell me how to solve this what are the steps ,
September 14, 2011 by Anonymous

chem
calculate the PH of [OH-] = 4.510−3 M Please show how you work this problem.
January 18, 2012 by john

chem please help
Find the number of moles of H2 in 1660mL H2 gas.
July 17, 2013 by Anonymous

chem please help drbob222
When is there a need to determine G? A. When H > 0 and S = 0 B. When H > 0 and S > 0 C. When H = 0 and S < 0 D. When H > 0 and S < 0 P.S. there are triangles before the G, H, and S.
November 25, 2014 by Morgan

Career Explorations - Please Check My Answer
Please help me with the following questions: Nichole has been a police dispatcher who answers 911 calls. After working in this position in the police department for a while, she decides that she wants to become a police officer. Nichole would like to change her A. job pathway...
September 4, 2014 by Brady

chem HELP PLEASE
how do i calculate a concentration ratio of oxidised to reduced cytochrome c Fe2+ to Fe3+ given at 25 C and pH7 E(mV) as 100 and absorbance at 550nm as 1.5 E is relative to standard hydrogen electrode i dont know how im supposed to calculate it from this data please help!!!
February 18, 2010 by lu

chem please help
how do i calculate a concentration ratio of oxidised to reduced cytochrome c Fe2+ to Fe3+ given at 25 C and pH7 E(mV) as 100 and absorbance at 550nm as 1.5 E is relative to standard hydrogen electrode i dont know how im supposed to calculate it from this data please help!
February 18, 2010 by lu

chem HELP PLEASE its physics side of chem
given E, = l^2 h^2 / 2 m r^2 calculate energies for an electron localised to a circle of radius 2 x 10^-9 m for l = 0,1,2, draw pictures of three levels and calculate the relative populations of these levels at 300K i did the first bit but came out with, 0, 6.0249 x 10-6 J mol...
October 27, 2009 by poppy

Math/Statistics
According to the U.S. census bureau, the total 2008 U.S. population was 303,824,640. The chart below summarizes the 2008 population for five U.S. States: Missouri 5,911,605 Pennsylvania 12,448,279 Tennessee 6,214,888 Utah 2,736,424 Washington 6,549,224 What is the probability ...
May 1, 2011 by Rodney

physics 911
A force ~F = Fx ı+Fy | acts on a particle that undergoes a displacement of ~s = sx ı + sy | where Fx = 10 N, Fy = −1 N, sx = 5 m, and sy = 3 m. Find the work done by the force on the particle. Answer in units of J b) Find the angle between ~F and ~s. Answer...
October 15, 2011 by physics

chem help please!
what is the formal charge for OMe and how many electrons would it donate?
February 5, 2009 by mary

Chemistry
Is DrBob222 available tonight? Please let me know, I need some chem help.
October 11, 2010 by Karen

Chem ap
What happens to cell potential as temperature decreases? Please explain
April 3, 2011 by boots

chem please..
are we exchanging force-carrying particles when we touch something?
February 24, 2014 by Anonymous

Chem Help Please!
Explain why bromination of cyclohexene produces trans 1,2-dibromocyclohexane.
October 21, 2014 by JuYoung

Chem Help Please!
Explain why bromination of cyclohexene produces trans 1,2-dibromocyclohexane.
October 22, 2014 by JuYoung

CHEM AP please help!!
Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32-mg mosquito moving at a speed of 1.61 m/s if the speed is known to within 0.01 m/s i tried every way and still cant get it..please someone help
October 23, 2011 by Karina

Chem help-please
At o degrees celcius, a 1.0-L flask contains 5.0 x 10^-2 mol N2, 1.5 x 10^2 mg O2 and 5.0 x 10^21 molecules of NH3. What is the p00artial pressure of each gasnand what is the total pressure in the flask? I need to understand how to calculate it, formula and how to get the ...
May 4, 2012 by KL

Chem for final, please help!
How many moles of H+(aq) ions are present in 1.25 L of 0.75M Nitric Acid? A. 0.60 mol B. 0.75 mol C. 0.94 mol D. 1.7 mol E. 1.9 mol Please show me how to work this!
December 7, 2010 by lavonne

chem
Can someone show me the structural formula (lewis diagram) for ethene??? Please
March 31, 2010 by Stacey

Chem please help
Formulas for the covalent compounds: Diphosphorous monoxide Tetrasulfur hexaiodide
February 23, 2012 by Margearett

Chem
238U + 2H --> ________+ 2 1n 92 1 0 I don't know the answer that goes in the blank or how to figure it out. Please help me. Thanks
March 11, 2012 by Andretti

Chem Please Help
If a 2.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? A<-> 2B Kc= 5.04x10^-6 at 500k
April 1, 2014 by Anonymous

Chem Help Please!
Give the full mechanism for the reaction of 3-bromo-3-methylpentane with methanol. Thank you!
October 14, 2014 by Jesicca

Chem
This is a lab concerning activity serious of metals and calculation of electrode portentions... Complete the following: if there is NO reaction write NR: (They provided the reactants, my answer is the products) Iron(s) + copper sulfate(aq) → iron sulfate(aq) + copper(s) ...
March 28, 2007 by Marisol

Simple Chem O2
What is O2 mean? Also what is oxygen gas the formula? Please could someone answer this?
June 2, 2010 by A

chem (urgent)
Can someone please explain to me in simple terms what the eutectic point and temperature are?
September 16, 2011 by laura

Chem 1A
Help please! How many moles of NaOH must be added to 1.0 L of 3.0 M HC2H3O2 to produce a solution buffered at each pH? 1) pH= 3.78 2) PH= 6.52
March 15, 2012 by Mackenzie

Chem
Please help how to set up How many grams of CuSO4 * 5H2O are needed to prepare 100.ml of a 0.10 M solution?
April 29, 2014 by Nicholas

Chem Help Please!
Explain why the stability of alkyl carbocations is: tertiary > secondary > primary > methyl Thanks!
October 21, 2014 by Kimberly

Chem! Please helpppp!!!!!
Consider the evaporation of methanol at 25.0 c: CH3OH(l)-- CH3OH(g) I figured out that Delta G is 4.3 kJ. Find the Delta G at 25 C under the following conditions: Pressure of CH3OH= 157mmHg, 103mmHg, 14mmHg thanks! please explain
November 11, 2010 by JP

Urgent for Chem!
need help in balancing equation for NO2 + O2 -> NO + O3 Please help it may look balance but it is not. This is a tricky one
March 15, 2008 by Anynamous

CHEM
can u rank the fallowing elements by increasing electronegativity: sulur, oxygen, neon, and aluminum. please help!
January 24, 2010 by Jay

Chem 2
Calculate the solubility of silver chromate, Ag2CrO4- in 0.005M Na22Cr)4- Ksp=2.6X10-12 HELP PLEASE......
March 2, 2012 by DebC

chem
part 1 When 0.633 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 103C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do ...
May 14, 2010 by Anonymous

chem
so i posted this question yesturday and got some help. which is the stuff below. can you look at the last thing i said which was the answer i got by doing what DrBob222 said to do and tell me if its correct.(the question is the first section) thanks chem - hannah, A salt ...
November 10, 2010 by hannah

Dr. Bob
Dr. Bob, can you please tell me if I did my chem questions right... they have been sitting down there all day and all i need is someone to check if they are right please and thank you
February 19, 2008 by Lauren

chem
if a car produces 81g of {\rm CO_2}, how many grams of {\rm O_2} are used up in the reaction? the complete chem reaction is C2H6O+3O2--->2CO2+3H2O
October 19, 2012 by tracy

chem--please help me!!
when a 25.0 mL sample of an unknown acid was titrated with a 0.100 M NaOH solution. Determine Ka for the unknown acid. Volume NaOH = 12.5 mL; pH=3.80 please help me explain in details!!!
October 30, 2010 by Sue

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