a certain reaction has the following generaln form
74,738 results, page 92

Chemistry
What are the changes associated with a chemical reaction? 
Science
Clasify this reaction Zn(s) + 2HCl(aq)ZnCl2(aq)+H2(g) 
chemistry
Provide an example of a spontaneous reaction 
logic
What would be the standard form of the following sentence? "The only road to success is hard work" First I had "All roads to success are hard work." Now I'm thinking that that's wrong because "roads" is plural and I'm talking about "THE road." So now I'm thinking: "All things ... 
AP Chemistry
Consider the following reaction: PbCl2 + 2 NaOH → Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution after one mole of PbCl2 and 2 moles of NaOH are mixed in aqueous solution? 1. Na+ ions, Cl− ions and H+ ions 2. Pb2+ ions, Cl− ... 
psychology
Hi I need help with my homework, I wrote down my answers, just need you to check if their right. Thanks 1. which of the following is not a goal of psychology? A. Measurement **** B.Prediction. C. Control D. Intellectualism 2. psychologists need to decide how they will ___ the ... 
Business Law
The paper must be two pages, excluding title page and references page(s), and formatted according to APA style as outlined in the Ashford Writing Center. Imagine that you own each of the following businesses: Tinker’s Home Security Service (sole proprietorship) Tinker & ... 
chemistry
When 1.0 mol of ammonia gas in injected into a o.50L flask, the following reaction proceeds to equilibrium. 2NH3 <> N2 (g) + 3H2 (g) At equilibrium, 0.30 mol of hydrogen gas is present. a) calculate the equilibrium concentrations of N2 and Nh3. b) what is the value of ... 
Algebra
Given a line containing the points(1,4), (2,7) and (3,10) determine that slopeintercept form of the equation, provide one additional point on this line, and graph the funtion. Start by putting the first point into pointslope form: yy1=m(xx1), so y4=m(x1). Slope, or m, is... 
Chemistry (equlibrium direction) urgent
Consider the endothermic reaction 2 NO(g) <> N2(g) + O2(g) If I decrease the volume of the vessel and increasing the total pressure in the vessel, what direction will the equilibrium will shift? (left/right) (I know that decreasing the volume would shift to produce ... 
statistics
In a certain city, a fast food chain feels it is giving a bad reputation because it takes too long to serve the customer. Since the chain had four restaurants in this town, it is concerned with whether all restaurants have the same average servicing time. One of the owners of ... 
Science
Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will ... 
science
Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will ... 
Physics (12th Grade)
In a certain process 500 cal of heat is given to a system and the system does 100J of work. What will be the increase in internal energy of the system? 
physics
At a certain instant a ball passes location < 11, 10, 16 > m. In the next 3 seconds, the ball's average velocity is < 8, 37, 30 > m/s. At the end of this 3 second time interval, what is the height y of the ball? 
Life orientation
The media tend to focus on the male dominated sport and sport personalities as well as certain sport codes and neglect other.DO YOU AGREE WITH THIS STATEMENT? 
math
Bacteria in a certain culture increase at a rate proportional to the number present. If the number doubles in one hour, how long does it take for the number to triple? 
profit and loss
a man gains 20 % by selling apples at a certain price. if he sells it at rs. 1.2 higher than the previous price he gained 40 % find original cost price 
Math
Okay .. did you see my last answer? I think it is 5 But now I have another one and I think I know the answer but there is a trick question at the end. Maybe you can tell me if it is a trick or if it something I am missing. A golf classic starts with 64 golfers. The golfers ... 
math(check answers)
please check my math ANSWERS 1.which pair of ratio form a proportion? choose all that apply. A. 1/6, 4/20 B. 7/9, 28/36(I PICK THIS) C. 14/18, 21/27 D. 30/80, 8/18 2.which pair of ratios does not form a proportion? A. 3/5, 24/40 B. 30/10, 15/3(I PICK THIS) C. 9/14, 3/4 D. 7/12... 
Chemistry help plzzzzz!!!!!
I've tried solving this problem 100x and i keep getting it wrong. I don't know where i am going wrong. Wouldnt it be: (100ml * 4.180 * 6.49) + (6.50*6.49) 2713+42.2=2755.2= 2755.2/0.05=55104 Then convert to kj so 55104/1000=55.104 which would be 55.1 for correct sig digits... 
Chemistry (bond energies)
Why is it possible to have an accurate value of the energy of a hydrogenhydrogen bond, but not of a carbonoxygen bond? I know carbon and oxygen can form both double and single bonds, and hydrogen can only form single bonds. But apparently C=O has two different bond energies... 
Chemistry
If you put a piece of iron in an aqueous solution of blue Cu2+ ions the spontaneous redox reaction Fe+ Cu2+„³ Fe2+ Cu Will occur. An aqueous solution of Fe2+ ions is redbrown a. What is oxidized b. What is reduced c. What is the oxidizing agent d. What is the reducing ... 
chemistry
Nitric oxide (NO) can be removed from gasfired powerplant emissions by reaction with methane as follows: CH4(g) + 4NO(g) > 2N2(g) + CO2(g) + 2H2O(g) Complete the equation relating the rates for each of the following: a) the rate of appearance of N2 to the rate of ... 
chemistry
What is ΔH in the equation ΔG = ΔH  TΔS? A. The change in specific heat between the products and the reactants B. The change in enthalpy between products and reactants in a reaction C. The change in entropy between products and reactants in a reaction D. ... 
Science
The HaberBosch process, devised in the early 20th century, revolutionized global industry. It provides a way of “fixing” atmospheric nitrogen into ammonia, allowing for the production of fertilizers and the many nitrogenbased chemicals we use today. The reaction is ... 
Thermodynamics
The initial state consists of a closed system containing one mole of water (liquid) at 85°C and 1 atmosphere pressure. The immediate surroundings are also at 85°C and 1 atmosphere pressure. The change in state is described as this one mole of liquid forming vapor at 85°C, ... 
physics
In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O > H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the hydrogen ... 
science
2. Which of the following is responsible for carrying nutrients to and waste from the body’s cells? (1 point) plasma red blood cells red and white blood cells white blood cells 3. _________ defend the body against disease. (1 point) Fibrin Red blood cells Plasma White blood ... 
Chemistry
Given the equilibrium reaction N2(g) + 3 H2(g) <> 2NH3(g) + heat, an increase in temperature will: a) Increase the value of K b) Decrease the value of K c) Increase or decrease the value of K depending upon the concentration of reactants d) Will have no effect on the ... 
ap chemistry
there's a few questions I have...actually it's a bit more than a few... 1. Identify the carbon atom(s) in the structure shown that has (have) each of the following hybridizations: a. sp3, b. sp, c. sp2 N*triplebond*CCH2CH=CHCHOH  CH=O  H 2. Draw all the possible noncyclic... 
statistics
what method gathering data may be best use for the following situations. 1.study about culture minorities. 2.study about premarital sex among college students and the respondents are friends or classmates. 3.the subject of study is patients in comatose conditions. 4.the study... 
chem. stuff+5
9. The reaction 2 H2O(l)>>>O2(g) + 2 H2(g) requires 2.06 V, but the reaction 2 H2O(l) + 2 Cl –(aq)>>> H2(g) + 2 OH –(aq) + Cl2(g) requires 2.19 V. If a 1.0 mol/L solution of aqueous NaCl is electrolyzed, what voltage should be applied to get O2(g), but ... 
HELP PLSS SCIENCE
2. Which of the following is responsible for carrying nutrients to and waste from the body’s cells? (1 point) plasma red blood cells red and white blood cells white blood cells 3. _________ defend the body against disease. (1 point) Fibrin Red blood cells Plasma White blood ... 
science
1. The image above shows the Andes Mountains. Which of the following processes formed this feature? (1 point) (pic of Andes Mountains) Glaciers deposited sediment. Plates converged together to form the mountains. Plates pulled apart and released magma. Sand dunes hardened and ... 
Chemistry
Consider the following reaction: PbCl2 + 2 NaOH > Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution after one mole of PbCl2 and 2 moles of NaOH are mixed in aqueous solution? 1. Na+ ions, Cl− ions and H+ ions 2. Pb2+ ions, Cl− ions ... 
Reading
40. From Laurencaville, take highway 9 for 20 miles (about 30 minutes) until you reach the third katetown?? Exit (exit 116). Turn north on Park Street and drive for 3.1 miles, past six stop lights. Take a left on 3rd Avenue and drive six blocks. The store will be on the right ... 
Reading
40. From Laurencaville, take highway 9 for 20 miles (about 30 minutes) until you reach the third katetown?? Exit (exit 116). Turn north on Park Street and drive for 3.1 miles, past six stop lights. Take a left on 3rd Avenue and drive six blocks. The store will be on the right ... 
History
How do the unalienable rights of life, liberty, and the pursuit of happiness limit the powers of government? A:Unalienable rights force the government to expand and protect all right. B:Unalienable rights force the government to place no restrictions on liberty. C:Unalienable ... 
Marylyn
How do the unalienable rights of life, liberty, and the pursuit of happiness limit the powers of government? A:Unalienable rights force the government to expand and protect all right. B:Unalienable rights force the government to place no restrictions on liberty. C:Unalienable ... 
Physics
A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m/s2. 1) What acceleration would the force give to an object with a mass of (m2m1)? 2) A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m... 
Chemistry
A 0.960mol quantity of Br2 is added to a 1.00 L reaction vessel that contains 1.23mol of H2 gas at 1000 K. What are the partial pressures of H2, Br2, and HBr at equilibrium? At 1000 K, Kp=2.1×106 and ΔH∘ = 101.7 kJ for the reaction H2(g)+Br2(g)⇌2HBr(g). Dr ... 
Calc
The amount A(t) of a certain item produced in a factory is given by A(t) = 4000 + 48(t  3)  4(t  3)³ where t is the number of hours of production since the beginning of the workday at 8:00 am. At what times is the rate of production increasing most rapidly? 
intentive spellers typically
a. write only words they are certain can be spelled corrctly. b. never learn conventional spelling c. omit consonants in words d. Progress through a serious of stages 
English
choosing a conjunction and the relationship it expresses: you buy a rare manuscript, make certain of its authenticity. I used "Before" but it would be "time" or Should I use "If" and it would be "condition" This is so confusing!!! 
Math
In a certain 25W mercuryvapor ultraviolet lamp, 0.1% of the electric energy input appears as UV radiation of wavelength 2537 AËš . What is the UV photon emission rate per second from this lamp? 
Physics
The driver pushes the accelerator pedal as far down as possible. The car does not accelerate above a certain maximum speed. Explain the reason for this in terms of the forces acting on the car. 
Chemistry
A certain amount of calcium reacts with water and the formed hydroxide 49g completely neutralized phosphoric acid. Calculate the volume of hydrogen obtained, at STP, and the mass of calcium. 
Chemistry
A certain substance has a heat of vaporization of 62.08 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 361 K? I've gotten it to the point of: ln(4.50)=7466.47423176378616 K (1/361  1/T2) Solving for T2 but I don't know where to ... 
calculus
In a certain city the temperature (in °F) t hours after 9 AM was modeled by the function T(t) = 52 + 15 sin(πt/12) Find the average temperature Tave during the period from 9 AM to 9 PM. (Round your answer to the nearest whole number.) 
langauge arts
What is the best way to rewrite the following topic to form a focused thesis statement? Electric cars vs. Cars fueled with gasoline A. Cars fueled with gasoline shouldn't be allowed on the road, especially when electric cars are so readily available. B. Electric cars and cars ... 
Chemistry
A Starbucks Venti Caramel Macchiato contains about 42.0 grams of sugar. If we assume all the sugar is in the form of sucrose, use your answer from Question 4 to determine how many nutritional calories are produced in burning this quantity of sugar. Give your answer as a ... 
Ratios and Rates
Please help me with the following problems: 3. Express each ratio as a fraction in simplest form. 3 cups to 8 cups A. 3/16 B. 3/4 C. 3/8 D. 8/3 For this one, I think it is C. Is this correct? 6. Express each ratio as a unit rate. Round to the nearest tenth, if necessary. 100 ... 
art
Could you please check my answer please...thank you Which of the following is the best evaluation of the artwork based on the criterion that the piece feature imaginary creatures or things. 1. The artwork is successful because it features a fully clothed ravenheaded winged ... 
Science (technically astronomy)
I need help understanding and using the Cosmic Calander (ans in figuring out the dates certain events such as when our solar system was created). Can someone plz help me with this? Thnx in advance. 
Business Finance
What effects does depreciation have on cash flow? When it comes to ratio analysis, which ones are the most important? Which businesses might use certain ratios more than others and what was the purpose of the Du Pont Indentity? 
Chemistry
If delta H°rxn and delta S°rxn are both positive values, what drives the spontaneous reaction and in what direction at standard conditions? The spontaneous reaction is a)enthalpy driven to the left. b)entropy driven to the right. c)entropy driven to the left. d)enthalpy ... 
Chemistry
Another Equilibrium Question! The following reaction is at equilibrium in a closed 20.0L container. At equilibrium, the pressures of NH3 and HCl are both equal to 0.00552 atm, and the mass of NH4Cl (s) is 35.4 g. Calculate the equilibrium pressure of NH3 after 11.3 g of NH4Cl... 
Chemistry
Freeenergy change, ΔG∘, is related to cell potential, E∘, by the equation ΔG∘=−nFE∘ where n is the number of moles of electrons transferred and F=96,500C/(mol e−) is the Faraday constant. When E∘ is measured in volts, Δ... 
physics
In a certain series RLC circuit, Irms = 9.00 A, ΔVrms = 150 V, and the current leads the voltage by 32.0°. (a) What is the total resistance of the circuit? (b) Calculate the reactance of the circuit (XL  XC). 
Math
Statistics show that the sales force of a certain company successfully closed 296 sales out of 800 sales calls. What was their percent success rate? 
Trigonometry
An airplane approaches an airport. At a certain time, it is 939 m high. Its angle of elevation measured from the airport is 19.5◦. To the nearest metre, how far is the plane from the airport? 
maths
can you explain to me how to do this question i know i have to use differential equations but im not sure how to form an equation for inversely proportional question states grain is being poured at a steady rate to form a pile with height h, the rate at which the height is ... 
Math
What operation is used to change a fraction in simplest form to an equivalent fraction? What operation is used to change a fraction to simplest form? 
Algebra
How do I use an x and yintercept to write an equation in standard form? For example, how do I use the xintercept of 3 and yintercept of 6 to write an equation in standard form? 
math help plzzzz!!!!
Multiple Choice 1. What is 0.32 written as a fraction in simplest form? (1 point) thirtytwo over one hundred eight over twentyfive one hundred over thirtytwo sixteen over twentyfive 2. If Fran’s fudge recipe calls for two and onehalf cups of sugar and she increases it ... 
PreCalculus
I posted earlier and didn't get an answer so I'm posting againhoping someone could please check these twoI think they're correct Please check my answer: I think it's correct? 1.Find polar form of (3,2) r=sqrt of (3)^2 + 2^2)=sqrt (13) = 3.61 tan^1(2/3) = 33.79 18033.79... 
Human Body Types
I am looking for the genetic weaknesses that each genetic body type inherits, as I wish to form a chart that cross references these probable/possible weaknesses with factors such as eye colour/ hair colour and so forth. Can you or do you know of anyone who could help me please... 
chemistry
Ca + Br2 > CaBr2 its synthesis and the reason the reaction happens is stable electron configuration but i don't understand why. Responses chemistry  DrBob222, Wednesday, January 21, 2009 at 10:06pm Synthesis because it's two elements combining to form a single product. ... 
AP Chemistry
2 Questions (Multichoice and T/F, though not sure if they're right, and these 2 questions have no correspondence to each other) 1.) a.) Consider the following system at equilibrium where Kc = 1.20E2 and H° = 87.9 kJ/mol at 500 K. PCl5 (g) <=> PCl3 (g) + Cl2 (g) The ... 
chem
I have a few questions. 1. write the net ionic equation for a precipitate when solutions of magnesium nitrate and potassium hydroxide form. When I did this equation out, both products were soluble. Am I doing this wrong? 2. A 50.00 mL sample of .0250 M silver nitrate is mixed ... 
Chemistry
Chemistry equilibrium? Consider the reaction 2NO(g) + O2(g) = 2NO2(g) at 430C an equilibrium mixture consists of 0.020 mole of O2, 0.040 mole of NO, and 0.96 mole of NO2. Calculate Kp for this reaction given that the total pressure is 0.20 atm. I used PV=nRT to find the volume... 
Chemistry
A a water soluble salt forms a precipitant during Group 3 analysis. An acidic solution of this precipitant and NaBiO3 yields a pinkish color. This same salt has no reaction to concentrated H2SO4 or AgNO3, what is the chemical formula for this salt? B a brown colored salt ... 
Chemistry
A a water soluble salt forms a precipitant during Group 3 analysis. An acidic solution of this precipitant and NaBiO3 yields a pinkish color. This same salt has no reaction to concentrated H2SO4 or AgNO3, what is the chemical formula for this salt? B a brown colored salt ... 
Chemistry
The question says write a reaction for the ionization of the following compound in water. Identify the acid, the base, the conjugate acid, and the conjugate base in each of them. 1. H2SO4 2. KOH 3. CH3COOH 4. NH3 5. HNO3 My guesses are: H2SO4 + H2O > H3O+ + HSO4 KOH + H2O... 
Chemistry acids and bases
Given the following neutralization raction: HCO3^ + OH^ <=> CO2[over]3^ + H2O a. label the conjugate acidbase pairs in this system b. is the forward or reverse reaction favored? Explain. Write net ionic equations that represent the following ractions: a. the ... 
Chemistry: please help, I am stumped
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ... 
MAth 109
The formula d= square root of 3h/2 models the distance, d, in miles, that a person h feet high can see to the horizon. If the pool deck on a cruise ship is 80' above the water, how far can passengers on the pool deck see? Write the answer in simplified radical form. Then use ... 
English
Here is the second part of the email. 1) We plan to involve a group of 18/20 students in year 11 who are highachievers and are willing to devote sufficient time and energy to the project. 2) By the way, is the French school or your school acting as a coordinator of the ... 
PRE CALC! HELP
1. a plane has heading of 54 degrees & airspeed of 225mph. The wind is blowing at 33mph from 144 degrees. what are its actua heading & airspeed? Round to one decimal place. A) 61.4deg, 257.1mph B) 7.4deg, 66114.0mph C) 136.6deg, 288mph D) no solution 2. Force with magnitude of... 
MATH
The ratio of graduate students to undergraduate studaent at a certain university is 4 to9. if there are 2340 students at the university how many undgergraduates are there? 
math
the revenue R from selling x units of a certain product is given by R=x(200.2x) How many units must be sold to produce a revenue of $500? 
arithmetic
In a certain arithmetic sequence, t6 + t15 = –141 and the common difference is –7. What is the first term of the sequence? explain how to do this please 
Maths
If the numerator and denominator of the fraction 4 9 are both increased by a certain value, m, the fraction then becomes equal to 3 4. Calculate this value. 
Math
If a person rode 45 miles stopping at certain intervals in 9 times and if the intervals were equally apart. How far apart were they? 
algebra
$6300 is invested,part of it at 10% and part of it at 7%.For a certain year, the total yield is $534.00. How much was invested at each rate 
algebra
$6300 is invested,part of it at 10% and part of it at 7%.For a certain year, the total yield is $534.00. How much was invested at each rate 
algebra
There are approximately 4lbs of muscle for every 7lbs of body weight of a certain animal, how much of the weight is muscle? 
physics
The launching speed of a certain projectile is 3.0 times the speed it has at its maximum height. Calculate the elevation angle at launching 
algebra
$ 5900 is invested, part of it at 12% and part of it at 8%. For a certain year, the total yield is $ 596.00. How much was invested at each rate. 
Physics
The launching speed of a certain projectile is 9.8 times the speed it has at its maximum height. Calculate the elevation angle at launching. 
Physics
The launching speed of a certain projectile is 9.8 times the speed it has at its maximum height. Calculate the elevation angle at launching. 
Physics
The launching speed of a certain projectile is 9.8 times the speed it has at its maximum height. Calculate the elevation angle at launching. 
science
2. Why is it important to protect yourself from certain electromagnetic waves? What are some ways people protect themselves from these waves ? 
Algebra
$6300 is invested, part of it at 11% and part of it at 8%. For a certain year, the total yield is $597.00. How much was invested at each rate? 
Algebra
$6300 is invested, part of it at 11% and part of it at 8%. For a certain year, the total yield is $597.00. How much was invested at each rate? 
Science
A certain gas expands in volume from 2.0L to 6.0L at constant temperature. Calculate the work done by the gas if it expands,against a vacuum. 
algebra
$5900 is invested, part of it at 11% and part of it was at 6%. For a certain year, the total yield is at $509.00. How much was invested at each rate? 
maths
A sum of money becomes 8/5 of itself in 5 years at certain rate of simple interest. Find the rate of interest. 
math
A certain number between 10 and 100 is 8 times the sum of its digits, and if 45 be subtracted from it the digits will be reversed. Find the number.