# a certain reaction has the following generaln form

72,877 results, page 80

### chemistry redox

can someone check my labels for the reaction of a radical with an extra electron, (R(e-)) and an antioxidant, ArOH. R(e-) + ArOh --> RH + ArO(e-) R(e-) is oxidizing agent. ArOH is reducing agent. RH is reduced ArO(e-) is oxidized. Is this correct? And the other possible ...

### geography

Compare and contrast folded mountains to volcanic mountains. How they are alike? How they are different? i got some of it.. Similarities: Both were probably formed from convergent plate boundaries. Difference: Volcanic Mountains - are mountains that form when molten rock ...

### Chemisrty

Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in mole fraction of the condensed vapor. ...

### Chemistry

Given the reactant side of the total ionic equation for the neutralization reaction of ammonium hydroxide (NH4OH) with hydrochloric acid (HCl), write the total ionic equation (also known as the complete ionic equation) by entering both the reactant and the product species, ...

### Chemistry

On the semi - reactions below is correct to say: Li + + 1℮- => Li. Eº = -3,04V. Au 3+ + 3℮- => Au. Eº = + 1,50V. Pb 2+ + 2℮- => Pb . Eº = - 0,13V. Ag + + 1℮- => Ag. Eº = + 0,80V. a) In the semi reaction Ag, the potential fold if the ...

### Chemistry

a glavanic cell is set up by connecting the following half-cells together: nickle electrode in nickel nitrate solution and a copper electrode in copper nitrate solution. in which half-cell will oxidation occur? in which half-cell will reduction occur? write the half reaction ...

### algebra (check plz)

write an equation in slope-intercept form of the line that passes through the given points. a. (-6,1), (3,-7) b. (-2/3,4), (6, -1/3) write an equation in point-slope form of the line that passes through the given poitns. c. (-2,5), (4,-3) d. (1/2,-1), (-2/3,6) ...

### Algebra

5. A piece of rope is cut into two pieces. One piece is used to form a circle and the other is used to form a square. Use a length of rope of 20 feet to write a function f representing the area of the circle as a function of the length of one side s of the square.

### chemistry(check my asnwer)

Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2 MnO4– + Fe2+ Mn2+ + Fe3+ ? A. KMnO4 is not added to either reaction. B. The presence of K+ would result in a net positive charge in the products. C. The ...

### Chemistry

The equilibrium constant, K, for the following reaction is 1.54×10-2 at 506 K: PCl5(g) PCl3(g) + Cl2(g) An equilibrium mixture of the three gases in a 15.7 L container at 506 K contains 0.207 M PCl5, 5.64×10-2 M PCl3 and 5.64×10-2 M Cl2. What will be the concentrations of ...

### Biology

Cellular Respiration and Photosynthesis co-exist as paired metabolic processes. Photosynthesis uses light energy to convert carbon dioxide into glucose, a simple sugar, in two steps, the light dependent and light independent reactions. Oxygen is produced as a by product during...

### Algebra

If an even is certain to occur, the probability that the event will occur is ___?

### algebra

When the quotient of a certain number and 6 is decreased by 14, the result is 4 find the number.

### chemistry

A student determines that the density of a certain metal is 5.2 g/ml. Could the metal be lead? Why?

### chemistry

A certain weak base has a Kb of 9.00x10^-7. What concentration of this base will produce a pH of 10.30?

### physics

2. The speed of light in a certain plastic is 1.88*10^8 m/s. what is the index of refraction of plastic?

### Math

If 19 is subtract from three times a certain number,the difference is 11.what is the number?

### Social study

why are certain projects called multi purpose projects

### Science

A certain object has a volume of 25.0 mL and a mass of 100 g. What is the density of the object?

### math

when a third of a certain number is added to 8,the result is more than 10.what is the number?

### Science

How does the release of certain nutrients into a lake harm the lake?

### Calculus 2

find an equation to the curve at the point corresponding to the given value of the parameter. x = tcost y = tsint when t = π i know I am supposed to find dy and dx which is: dy = (product form) t*-sint + 1*cost simplifying = -tsint+cost dx = tcost+sint now, to find the I ...

### chemistry

In Part I the reaction you observed was Mg(OH)2 (s) Mg2+ (aq) + 2 OH- (aq). Compare the colors you observed in the experiment and answer these questions: A. Which way should the equilibrium shift when HCl is added? How do your results support your answer? Shift to ...

### chemistry(check my answer)

Which of the following will be affected by the addition of a catalyst to a chemical reaction? a)the value of the reverse rate constant, kr b)the magnitude of the equilibrium constant c)the value of the forward rate d)ΔHo e)the value of the forward rate constant, kf f)&#...

### Social Studies

(Can you please check my answers)one major landform that is found in both united states and canada is A. The Kilauea Volcanos B. The Rocky Mountains (C.) The Great Basin D. Mount Logan 2 Why are the Great Lakes important to both the United States and Canada A. They form the ...

### Chemistry

ok.. im confused: Ammonia and oxygen react in the equation: 4NH³+5O²--> 4NO+6H²O. When 2.4 mol of NH³ are present, the reaction yields ____ mol of O². i have no clue how ot do this! Look at your problem to make sure it is posted correctly. NH3 REACTS with O2; it doesn'...

### geometry

1. which solid has two bases that are triangles and three lateral surfaces that are rectangles a. triangular pyramid b. rectangular prism c. triangular prism *** d. rectangular pyramid 2. a solid with two parallel and congruent bases cannot be which of the following a. ...

### Algebra

1. which solid has two bases that are triangles and three lateral surfaces that are rectangles a. triangular pyramid b. rectangular prism c. triangular prism *** d. rectangular pyramid 2. a solid with two parallel and congruent bases cannot be which of the following a. ...

### math - standard form

please could you check the first 2 then explain the method on the other 2 1)5.2x10^6 + 3x10^5 5200000+300000=5500000 5.5x10^6 2)4.2x10^5 + 1.28x10^6 420000+1280000=1700000 1.7x10^6 method please 3)6.5x10^-3 - 3.5x10^-9 0.065-0.000000035=0.064999965 how do you convert this ...

### MAT/117

a. Suppose that a market research company finds that at a price of p = $40, they would sell x = 37 tiles each month. If they lower the price to p = $25, then more people would purchase the tile, and they can expect to sell x = 52 tiles in a month’s time. Find the equation of...

### Stats

3. A mail order magazine service has the exclusive subscription rights to a certain magazine. Subscriptions can be reserved for one, three, four or five years. A study of the subscriber list for other similar magazines reveals that the following information regarding the ...

### Calculus

A car passes by a certain point at t = 0 hours heading east at 40 miles/hour. At t = 1 hour, another car passes by the same point heading north at 50 miles/hour. Which of the following functions equals the distance L (in miles) between the two cars as a function of t, for t is...

### math3333

y+2/y =1/y-5 *Please solve the rational equation I am not certain if the right term is 1/(y-5) or the right side is 1/y -5

### chemistry

A certain metal hydroxide, M(OH)2 contains 32.8% oxygen by mass. What is the identity of the metal M? I don't understand what its asking for.

### health

Are there certain health care benefits you feel should not be covered by Medicare or Medicaid?

### psychology

Is their a certain format for article reviews, possibly in APA format? If so, where can I find an example?

### physics

A certain radio wave has a frequency of 2.0*10^6 Hz. What is its wavelength? c=3*10^8 m/s wavelength = 3*10^8 _______ 2*10^6 = 150 m is this done correctly?

### English

In the poem Warren Pryor, what does the author pick this certain pattern or rhythm for the poem?

### Chemistry

The four quantum numbers for the last electron placed in the orbitals of a certain element are: n=3 l=2 m of l=0 and m of s=-1/2. What is the element?

### chemistry

the work done by the system during a certain adiabatic process is 200J. What is the change in U of the system

### chemistry

If the density of a certain alcohol is 0.785 g/mL, what volume of the alcohol would have a mass of 75.0g?

### MATH

A CERTAIN RECIPE ASKS FOR 2/9 CUP OF GRANOLA. HOW MUCH IS NEEDED TO MAKE 7/3 OF A RECIPE?

### MATH

A CERTAIN RECIPE ASKS FOR 2/9 CUP OF GRANOLA. HOW MUCH IS NEEDED TO MAKE 7/3 OF A RECIPE?

### Physics

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

### Physics

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

### Chemistry

At a pressure of 103kPa and a temperature of 22 degrees C, 52.9 g of a certain gas has a volume of 31.5 L. what is the identity of this gas?

### Physics

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

### Math

The question says When the square of a certain number is diminished by 5 times.. What does diminished by mean?

### physics

A certain circuit breaker trips when the rms current is 50.0 A. What is the corresponding peak current?

### chemistry

A certain elementary gas is triatomic and has vapour density 48 . The atomic mass of the gas is (a) 48 (b) 96 (c) 32 (d) 16 ..

### chemistry

The speed of a certain proton is 4.5×10^5m/s. If the uncertainty in its momentum is to be reduced to 0.1%. Calculate the uncertainty in its position

### math

three times a certain number is not greater than 54, find the range of values of the number

### SOCIAL STUDIES

A democracy may be defined by the political principle that the government is created by, derives its powers from, and exists to serve the people. According to this statement, which of the following is inconsistent with a democratic form of government? (1) The citizens of a ...

### Probability

Let Θ be an unknown random variable that we wish to estimate. It has a prior distribution with mean 1 and variance 2. Let W be a noise term, another unknown random variable with mean 3 and variance 5. Assume that Θ and W are independent. We have two different ...

### Chemistry

Is it possible to use the appearance of hydrates to determine if there is moisture in a room? Yes, it is possible in some cases. For example, CoCl2 is blue in the unhydrated form and pink in the hydrated form. As a kid, I used a water color brush to "paint" a solution of CoCl2...

### Chemistry, reactions w/ water

Write the equation for the reaction of each of the following with water. a) HCl b) CH3COOH c) NaOH d) NH3 Are these correct? a. HCl (aq) + H2O (l) --> H3O+ (aq) + Cl- (aq) b. CH3COOH (aq) + H2O (l) --> CH3COO- (aq) + H3O+ (aq) c. NaOH (aq) + H2O (l) --> Na+ + OH- + ...

### Chemistry

The experimentally determined rate law for the reaction H2 + NO --> ½N2 + H2O is Rate = k[H2][NO]2. Is the mechanism below possible? Step 1: H2 + NO --> N + H2O Slow Step 2: N + NO -->N2 + O Fast Step 3: O + H2 --> H2O Fast 1. Yes, because the slow step ...

### Chemistry

A reaction has a standard free-energy change of –10.30 kJ mol–1 (–2.462 kcal mol–1). Calculate the equilibrium constant at 25ºC.? This is what I've done so far.. ∆Gº= -2.3 RT + log (K) -10.31 kJ = -2.3 (.0083145)(298) + log K -10.31 kJ = -2.3 (2.48) log K log K...

### Mya PLEASE :)

What is the correct form of lequel to replace the follow noun: le balcon - Lesquels - Lequel - Lesquelles - Laquelle What is the correct form of lequel to replace the follow noun:le magasin - Lesquelles - Lesquels - Lequel - Laquelle What is the correct form of lequel to ...

### french

What is the correct form of lequel to replace the follow noun: le balcon - Lesquels - Lequel - Lesquelles - Laquelle What is the correct form of lequel to replace the follow noun:le magasin - Lesquelles - Lesquels - Lequel - Laquelle What is the correct form of lequel to ...

### Probability

Please help.. Find the probability of getting 2 hearts if the cards are drawn from a regular deck and the first card is not replaced. A true/false quiz consists of twenty questions. If a student answers the twenty questions by making random guesses, what is the probability of ...

### Math

1.Write the equation 5x+y-2=0 in normal form. 5x+y-2=0 5x+y=2 (add two to both sides) Standard form (Ax+By=C)---> 5x+y=2 Y-intercept (when x equals 0) 5x+y-2=0 5x+y=2 5(0) +y=2 y=2 X-intercept (when y equals 0) 5x+y-2=0 5x+y=2 5x+0=2 x=2/5 Slope intercept (y=mx+b) 5x+y-2=0 ...

### plz..chemistry help

One mole of solid NH4Cl (s) isvheated in a closed box to decompose it partially according to the following reaction: NH4Cl (s) <=> NH3 (g) +HCl (g) A) calculate Kp of the above system at the temperature of the experiment if the partial pressure of ammonia at ...

### Math Help Please

Would you please explain the steps you used to get the answer 2469. Thank you Using the 9 digits, 1, 2, 3, 4, 5, 6,7, 8 and 9 you can arrange four different digits to form a four-digit number that is NOT divisible by 7. The digits 1238 cannot be arranged to create a four-digit...

### chemistry

Use the equation below to answer the questions that follow. Br2 + Cl 2 ⎯→ 2BrCl a. How many moles of BrCl form when 2.74 mol Cl2 react with excess Br2? b. How many grams of BrCl form when 239.7 g Cl2 react with excess Br2? c. How many grams of Br2 are needed to ...

### science

This is the hypothesis about the affect of inhibitors on enzyme: --If the competitive inhibitor presence, then it might cause the reaction to slow down due to some of the available enzyme sites are occupied by the inhibitor. --For noncompetitive inhibitor: if the ...

### percentage

In an exam every question correctly answered fetches 2 marks. Every question wrongly answered loses 1 marks. unanswered question have no marks associated with them. ram and shyam wrote this exam. ram attempted a certain number of questions and 30 % of them went wrong. shayam ...

### Algerbra

Write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of the given equation. (-8, -4); y=-4x+3 Write an equation for the line in slope-intercept form.

### Chemistry

The rate constant for the decomposition of gaseous azomethane, C2 H6 N2 (g) > N2 (g) + C2 H6 (g) Is 40.8 min-1 at 425OC. Find the number of moles azomethane and the number of moles of nitrogen 0.0500 minutes after 2.00 g of azomethane is introduced. Assume that the ...

### CHEM:

The bond enthalpy of the Br−Cl bond is equal to ƒ¢H‹ for the reaction BrCl(g) ¨ Br(g) + Cl(g). Use the following data to find the bond enthalpy of the Br−Cl bond. Br2(l)--->Br2(g) ƒ¢H=30.91 KJ/mol Br2(g)--->2Br2(g) ƒ¢H=192.9 KJ/mol Cl2(g)---->...

### Language arts

The giver Choose the statement that best explains the meaning of the following passage: But now, with twelve coming so soon, and the volunteer hours ending, it didn't seem to meter. The freedom to choose where to spend those hours always seemed a wonderful luxury to Jonas; ...

### language arts

The giver Choose the statement that best explains the meaning of the following passage: But now, with twelve coming so soon, and the volunteer hours ending, it didn't seem to meter. The freedom to choose where to spend those hours always seemed a wonderful luxury to Jonas; ...

### chemistry

RE: Le Chatelier's principle. this was the whole question i was given. Write a short account of around 250 words in total, with reference to Le Chatelier’s principle, in which you explain the following: (i) The effect on the equilibrium yield of nitric oxide of increasing ...

### algebra

4)Write the equation x^2-2x+y^2+4y=11 in standard form. answer= (x-1)^2+(y+2)^2=16 5)Write the equation 4x^2+24x-y+34=0 in standard form answer= y= 4(x-3)^2+2

### Chemistry

Reposting with correct information..Carbon tetrachloride (CCl4) and benzene (C6H6) form ideal solutions. Consider an equimolar solution of CCl4 and C6H6 at 25°C. The vapor above this solutionis collected and condensed. Using the following data, determine the composition in ...

### CHEM 1B

Carboxylic acids are stronger acids than alcohols A. This is because the carboxy anion is delocalised. B. This is because the hydrogen atom is delocalised. C. The O-H bond in carboxylic acids is very strong. D. This statement is not true One characteristic of monomers that ...

### Ksp/Ka Questions-Chem

I really don't understand how to set this up. Any help is really appreciated! I really don't quite understand how to set up a caluculation to figure out whether a precipitate will form and i'm struggling with the second half too! When 25.75 mL of 0.00826 M lead II nitrate is ...

### science

as temperture rises solids become more soluble in water,but gases become more less soluble.if a soft drink contain high concentration of sugar and carbon dioxide which of the following may be expected to happe if it is cooled down? 1)sugar amy percipatate out2.gas bubbles may ...

### chemistry

Given the following thermochemical equations, NO(g) + (1/2) Cl2(g) --> NOCl(g) -37.78 kJ (per mol NOCl) NO(g) + (1/2) O2(g) --> NO2(g) -56.53 kJ (per mol NO2) 2 NO2(g) --> N2O4(g) -58.03 kJ (per mol N2O4) what is the standard enthalpy change for the reaction below? ...

### chemistry

Given the following thermochemical equations, NO(g) + (1/2) Cl2(g) --> NOCl(g) -37.78 kJ (per mol NOCl) NO(g) + (1/2) O2(g) --> NO2(g) -56.53 kJ (per mol NO2) 2 NO2(g) --> N2O4(g) -58.03 kJ (per mol N2O4) what is the standard enthalpy change for the reaction below? ...

### Chemistry

At a pressure of 103 kPa and a temperature of 22oC, 52.9 g of a certain gas has a volume of 31.5 L. What is the identity of this gas?

### physics

The hour hand on a certain clock is 8.3 cm long. Find the tangential speed of the tip of this hand. v{t}= ???? {mm/s}

### Chemistry

A l.00L flask contains 4.40mol of HI at a certain temperature. The Keq at this temperature is 5.0 * 10^-4. What are the concentrations of H2 and I2 at equilibrium?

### gyro

a gyro always points to a certain direction, but how is it made to point only towards north?

### Substance Abuse

only certain people can become alcoholics? True or False. I think Its False?

### chemistry

In a certain process, the internal energy of a system increases 40.7 J and the quantity of work the system does on the surroundings is 78.9 J. What is q?

### Algebra ii

A certain town is at a latitude of 35.2 degrees N. Find the distance in miles from the town to the north pole.

### music

i have to do research on certain music composers and their peices what is a good website to check for bio's

### physics

A certain projectile is launched with an initial speed Vo. At its highest point its speed is Vo / 6. What was the launch angle?

### English

Where do you find the editor of a certain article of a website? Where can you find the name of the organizatin that associated with the site??

### Linear Algebra

Suppose that in a certain basis B = (x,y,z), vector u is: u = 2x+3y-z. Find a unit vector with the same direction as u. Thank you

### math

A certain lock has four tumblers, and each tumbler can assume four positions. How many different possibilities are there? 1

### Chemistry

A certain gas has a density of 1.053 g/L at 25C and 752 mmHg. What is the molar mass of this gas?

### urgent (physics)

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

### math

A certain test is worth 145 points. How man points are needed to obtain a score of $65%?

### math

If a certain number is added to the numerator and denominator of 1113 , the result is 1011 . Find the number

### maths

The compound interest on a certain sum for 2 years is Rs 41 and simple interest is Rs 40.Then the rate per annum is

### bvanhs

at a certain time of the day a tree casts a shadow of 5ft. find the ht. of the tree if tan.A = 5/6.

### math

a certain alloy contains 5.25% cooper. how much cooper is there in a piece weighing 200 pounds.