65,852 results

Math
solve equation in interval. sec x = -3 -¦Ð ¡Ü x < ¦Ð the answer is x = -1.911 and 1.911 could someone please write the steps to solving this

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)

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?)

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?

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 ...

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 ...

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.

It is important to(blank) thr victim before calling 911 A. Call B. Care C. Check D. Catch Is the answer C?

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!!

Math Help 911
Which of the following is greater than 4.3•10^9. A.2.1•10^9 B.3.2•10^9 C.5.3•10^9 D.7.4•10^8 Is the answer C?

french
Hi I will be traveling to Quebec and I want to know how do you call 911 there? Is it the same number?

chemistry
can you please give me some practical applications of qualitative chem and quantitative chem...

math
order the numbers form greatest to least 291;911;439;747

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....

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....

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

sociology ethnicity
What are the changes in American Policies since 911 towards Muslims and Arabs and the treatment of them?

Physics
Calculate the current in the 240-Ώ filament of a bulb connected to a 120-V line. Power = IV

Safety & Emergencies
5.)It is important to _____ the victim before calling 911? A.)Call B.)Care C.)Check*** D.)Catch C?

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

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

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 25°C? chem - DrBob222, Tuesday, February 22, 2011 at 10:52pm q = mass water x delta Hvaporization. chem - Rebekah, Wednesday, February 23, ...

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

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?

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!

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 27°C (c) 117 mL SO2 at 0.823 atm and -53°C

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

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?

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

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 ...

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 R² = 0.6291 why is it wrong. im desperate please help! screen shot of my graph: ...

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

Health
1.) call 911 for A.) hypothermia *** B.) a muscle strain C.) a sprained ankle D.) a headache 2.) a joint that is twisted or overstressed and one or more of the bones that normally meet at that joint are displaced should be treated as a A.) sprain*** B.) strain C.) dislocation ...

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

Math
Which is the best display for the set of numbers of daily 911 calls made in 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 graph d) line plot I think its either A or D

organic chemistry
whats the difference between inorganic chem and organic chem? im really confuse because mrs. white told us inoraganic is about ionic bonds while organic is about covalent bond. what is the difference between the twooo? please help me

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...

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?

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 ...

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 ...

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 ...

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?

Math
Which is the best display for the set of numbers of daily 911 calls made in 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 plot I think its either A or D

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

Math
The telephone company wants to know how many different phone numbers are available for one area code. the only restrictions are on the prefixes, you can't start with a zero and you can't use 411, 611, 811, 911, or 555. how many different phone numbers are available?

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!!!

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

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?

chem
what are the other practical applications of Analytcal chem on being a medical technologist?

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

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!!:)

chem

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?

O-CHEM

O-CHEM
Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not? please help... thanks

chem. AP

chem

Chem

org chem

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??

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 ...

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...

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 ...

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 don't know how im supposed to calculate it from this data 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 don't know how im supposed to calculate it from this data please help!

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

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...

Chem Urgent!

college chem
PLEASE..Determine [OH-]of a solution that is 0.270 M in HCO3-...thanks

chem
convert 8.00in^3 to ml please tell me how to solve this what are the steps ,

chem
calculate the PH of [OH-] = 4.5×10−3 M Please show how you work this problem.

Find the number of moles of H2 in 1660mL H2 gas.

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.

balance the redox reaction NO2^- + Ag^+ = NO3^- + Ag

College Algebra
Jim wants to build a rectangular parking lot along a busy street but only has 2,700 feet of fencing available. If no fencing is required along the​ street, find the maximum area of the parking lot. I got the answer 911.25 which was incorrect I'm not sure what im doing wrong

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...

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 ...

what is the formal charge for OMe and how many electrons would it donate?

Chemistry
Is DrBob222 available tonight? Please let me know, I need some chem help.

Chem ap
What happens to cell potential as temperature decreases? Please explain

are we exchanging force-carrying particles when we touch something?

Explain why bromination of cyclohexene produces trans 1,2-dibromocyclohexane.

Explain why bromination of cyclohexene produces trans 1,2-dibromocyclohexane.

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...

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

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 ...

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!

chem
Can someone show me the structural formula (lewis diagram) for ethene??? Please

Formulas for the covalent compounds: Diphosphorous monoxide Tetrasulfur hexaiodide

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

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

Give the full mechanism for the reaction of 3-bromo-3-methylpentane with methanol. Thank you!

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) ...

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 ...

physics 911
A force ~F = Fx ˆı+Fy ˆ| acts on a particle that undergoes a displacement of ~s = sx ˆı + sy ˆ| 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. ...

Chem
A student mixed 6 g of ice at -3.4 degrees celsius with 1 g of steam at 103 degrees celsius. What was the final temperature of this mixture.i tried equalling mcdelta T. Please help asap. I would be eternally grateful. Please answer in kj or J only

CHEM 2: Boiling Point
Which Aqueous solution has the highest normal boiling point? a.) 0.1 m NaCl b.) 0.1 m C2H5OH c.) 0.1 m CaCl2 d.) They all have the same boiling point. I think that the answer is D, the all have the same boiling point. Is this correct? Because Delta T= K(b)msolute .... and if ...

Simple Chem O2
What is O2 mean? Also what is oxygen gas the formula? Please could someone answer this?

chem (urgent)
Can someone please explain to me in simple terms what the eutectic point and temperature are?

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

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