a certain reaction has the following generaln form

72,980 results, page 42

Gen. Chem

To make a solution with a pH = 4.40 a student used the following procedure : a certain amount of sodium acetate along with 0.280 moles of acetic acid is added to enough water to make a solution of 1.00 L How many grams of sodium acetate were added ? Ka = 1.80 x 10 -5

science

I'm doing a lab for Le Chatelier's Principle. I'm concerned that all my answers sound very similar. Can someone help me and let me know if my answers are making sense? ~Thanks 1.) How is the reaction Zn(OH)2 <=> Zn^+2 + 2OH- affected by adding OH- I think since we are ...

Chemistry

I have read Le Chateliers principle but am having a little trouble explaining the effect of pressure and temperature on the equilibrium yield of methanol (CH3OH). Can anyone also tell me the effect of the increase of temp will have on the rate of the reaction? Yield of ...

Chemistry

An structural isomer of bromobutane (C4H9Br) can be hydrolysed using aqueous sodium hydroxide to produce butanol. This can be represented by the following equation: C4H9Br(l) + OH-(aq)  C4H9OH(l) + Br-(aq) This reaction was investigated experimentally and the following...

Math

Write the equation of the line in the indicated form that meets each criterion below. A. A line with a slope of -2/3 and a y-intercept of 4; in slope-intercept form B. A line with a y-intercept of – 2 and an x-intercept of 3; in standard form C. A line with a slope of – 3 ...

chemistry

Half reaction E0,(v) Ni2+(aq) + 2e-  Ni(s) -0.23 Co2+(aq) + 2e-  Co(s) -0.28 Fe2+(aq) + 2e-  Fe(s) -0.41 Cr3+(aq) + 3e-  Cr(s) -0.74 Mn2+(aq) + 2e-  Mn(s) -1.03 Which of the following metals could be used successfully to galvanize steel?

ap

Classify the reaction (NH4)2Cr2O7 ! N2 + 4 H2O + Cr2O3 as one or more of the following: Z1) combination Z4) metathesis Z2) decomposition Z5) displacement Z3) redox 1. Z2 only 2. Z2 and Z5 only 3. Z2 and Z3 only 4. Z3 and Z5 only 5. Z1 and Z3 only

Chemistry

Using G (measure of free energy) to determine wether the reaction 4Fe(s)+3O2(g)-> 2Fe2O3(s) is spontaneous at 25C, given that H=.393kcal and S=-0.13 kcal/(mol*K). Is the reaction more or less spontaneous at 1000C assuming that H and S remain constant with temperature? G at ...

precalc

does anyone know the general form equation of a circle with a center (4,5) that passes through (-1,2) ...and just checking, would the standard form equation be: (-1+4)^2 + (2+5)^2 = 58

math 6th grade

I need to write the percent as a fraction in the simplest form. Please show me step by how to get 15% in the simplest form. Thanks !

4th grade

Place value through millions. Write the word form and the short word form. 2,400,210.

Spanish 1

(Darme) a cuchara. I am supposed to replace Darme with the mandate form of the word. I replaced it with dénme, but that didn't work. What is the right form?

college algebra--need help please!!

write the standard form of the equation and the general form of the equation of the circle with radius r and center (h,k) r=10; (h,k)=(8,-6)

Math HELP!

1. Write 12/32 in simplest form. Could someone please help me on how I can turn this fraction into simplest form like explain the steps! Thanks.

Physical Science

For questions #14 – 17, write an equation for the reaction of magnesium oxide with sodium chloride to produce magnesium chloride and sodium oxide. 14. Show the formulas of the reactants. 15. Show the formulas of the products. 16. Write the balanced the equation for this ...

french

is this right: black in french is 'noir' for masculin form and for feminin form it is 'noires' please correct me

Maath

Find an equation of the line L in point slope form and in general form. L is parallel to the line 3x-2y+5=0 and contains (2,3)

chemistry

How many grams of NH3 form when 27.5L of H2 (measured at STP)react with N2 to form NH3 according to: N2(g) + 3H2 (g) = 2NH3 (g)

math

give an example of rational number in fraction form. write your rotational number in its decimal form.

Algebra II

(3-4yi)(6+7i)-[(2-3yi)-3(1+7i)] Express it in a+bi form I got 19+42i-21yi+28y but I do not know how to express it in a+bi form, can you please help me with it?

Standard Form

Find the equation in standard form for the line that satisfies the given requirements. passing through (1, 5) and (2, 6)

Chemistry

A student tested the effect of temperature on the decomposition of N2O5. He found that the rate of the reaction at a lower temperature was 4.2 x 10–3 s–1 and the rate at a higher temperature was 1.6 x 101 s–1. What is wrong with the student's data? A. Nothing. Rate ...

Chemistry

Hi I need help with finding the Reduction Half reaction and Oxidation Half Reaction for this: copper(II) acetate reacts with water Cu(C2H3O2)2 . H20 --> Cu^(2+) (aq) + 2(C2H3O2)^(1-)

Chemistry

The oxidation of sulfur dioxide to sulfur trioxide is an important reaction. At 1000K, the value of Kc is 3.6 x 10^-3. What is [SO3] at equilibrium when the reaction vessel is maintained at 1000K.

Chemistry

An exothermic reaction is spontaneous above 400K but non spontaneous below it. Of the deltaH for the reaction is -40.0 kcal, what are the values of deltaS and deltaG at 400K?

CHEMISTRY

The value of the equilibrium constant for the reaction below is 40.0 at a specified temperature. What would be the value of that constant for the reverse reaction under the same conditions?

chemistry

MgCO2(s)-> MgO9(s) + CO2(g) A. what is delta H reaction when 3.35 mol of CO2 react with excess MgO? B. What is delta H reaction when 305.5 g of MgCO3 decomposes.

Chemistry

what is the limiting reagent in these two reactions Reaction 1: CuSO4+2NaOH=Cuo+Na2SO4+H2O Reaction 2: CuSO4+NaCO3=CuCO3+Na2SO4

physics 30

Given the reaction 3 NO2(g) + H2O(l) ¨ 2 HNO3(l) + NO(g) ƒ¢rH = -72.0 kJ, calculate the molar enthalpy of reaction, rH for: 1) NO2(g) 2) H20 (l) 3) HNO3 (l) 4) NO (g) Express you answer in Kj/mol

Chemistry ( HELP PLEASE!!! )

Consider the reaction H3PO4+ 3NaOH→Na3PO4+ 3H2O. How much Na3PO4 can be prepared by the reaction of 3.43 of H3PO4 with an excess of NaOH?

math

Part of the road is to be on a parabolic curve given by a function of the form y = ax2 + bx + c where x and y are local co-ordinates. The road alignment must pass through the following 3 points:- x = 150m y = 190.650m x = 300m y = 611.450m x = 450m y = 831.141m 5.1. Substitute...

ap chem

Analysis of a reaction mixture showed that it had the composition 0.417 mol/L N2, 0.539 mol/L H2, and 0.127 mol/L NH3 at 800 K, at which temperature Kc = 0.278 for N2(g) + 3H2(g) *) 2NH3(g) . Calculate the reaction quotient Qc .

Chemistry

From the Standard Potential Table in your general chemistry textbook: Which reaction has been chosen as the 'standard' against which every other reaction is measured? A. 2H+ + 2e– ==> H2 B. O2 + 4H+ + 4e– ==> 2H2O C. F2 + 2e– ==> 2F– D. Li+ + e– ==> Li E...

chemistry

Ammonium sulfate can be made by the reaction H2SO4 + 2 NH3 ® (NH4)2SO4. What quantity of ammonium sulfate will result from the reaction of 5.00 kg of ammonia and 20.0 kg of sulfuric acid?

Chemistry

Calcium reacts with water according to the chemical equation below: Ca + 2H2O--> Ca(OH)2 + H2 All but which reaction is expected to occur on the basis of the reaction of calcium and water?

Chemistry

Calcium reacts with water according to the chemical equation below: Ca + 2H2O--> Ca(OH)2 + H2 All but which reaction is expected to occur on the basis of the reaction of calcium and water?

chemistry

at high temperatures, ammonia decomposes to N2 and H2. 2 NH3(g)--> N2 (g) + 3H2(g) Delta H for the reaction is positive and delta S is positive. Estimate the temperature at which this reaction becomes spontaneous

CHEMISTRY

The value of the equilibrium constant for the reaction below is 40.0 at a specified temperature. What would be the value of that constant for the reverse reaction under the same conditions? H2(g) + I2(g)  HI(g)

chemistry

nitrosyl bromide, NOBr is formed from NO and Br2-. Experiments show that this reaction is second order in NO and first order in Br2. what is the rate equation for this reaction?

chemistry

The reaction below has an equilibrium constant of Kp=2.26×104 at 298 K. CO(g)+2H2(g)⇌CH3OH(g) Calculate Kp for the reaction below. 3CH3OH(g)⇌3CO(g)+6H2(g)

Chemistry1412

The reaction below has an equilibrium constant of Kp=2.26×104 at 298 K. CO(g)+2H2(g)⇌CH3OH(g) Calculate Kp for the reaction below. 3CH3OH(g)⇌3CO(g)+6H2(g)

chemistry

Consider the reaction Select a possible mechanism for the reaction. Step1:Step2:X2Y+Z2→X2YZ2 (slow)X2YZ2→X2YZ+Z (fast)

P.E

Which of the following defense mechanisms is Marissa using when she says "so what if I broke her stupid toy? She is always bothering me when I want to play video games and no one should have to put up with that all the time." A. Compensation B. denial C. Reaction formation D. ...

Chem

I was given a problem that my book did not explain how to do, so I attempted to figure it out myself. Let me know if my conclusion is fallacious. Given the reactions H2O(g) + CO(g) <--> H2(g) + CO2(g), K= 1.6 FeO(s) + CO(g) <--> Fe(s) + CO2(g), K= .67 Find K for ...

Chemistry

Carbon monoxide and molecular oxygen react to form carbon dioxide. A 49.0 L reactor at 200°C is charged with 1.14 atm of CO. The gas is then pressurized with O2 to give a total pressure of 3.54 atm. The reactor is sealed, heated to 350°C to drive the reaction to completion, ...

Chemistry Help!!

Determine triangle H when 10g of HN3 are reacted in the following reaction: 4HN3 + 2NO2 arrow pointing > 2H202 + 7N2 (note: triangle Hf for HN3 = +267.1 kJ Equation? Answer? Thanks

Chem

HA(aq)+ H2O (l) <-> H3O+(aq)+ A¯ (aq) Given the reaction above, which of the following will cause an increase in the pH of an equilibrium mixture? Give all answers which apply. A) add KA B) add HA C) remove A¯ D) remove HA E) none of these will affect the pH.

Chemistry

For the following acid-base reaction, calculate the mass (in grams) of each acid necessary to completely react with and neutralize 5.00 g of the base. HCl(aq)+ NaOH(aq)->H20(l)+NaCl(aq) Please explain how to do this.

Chemistry

Iron (II) ions can be precipitated from the following reaction: 4Fe(OH)+(aq) + 4OH-(aq) + O2(g) + 2H2O(l) --> 4Fe(OH)3(s) How many grams of oxygen gas will be needed to precipitate the iron contained in 125mL of 0.085M Fe(OH)+ solution?

CHEM

3. which of the following is not likely to indicate that a double-displacement reaction has occurred neutralization of acids and bases, formation of a precipitate, formation of a gas, change of a metal ion to a metal element

Chemistry 2

Which is reduced in the following reaction: Cr2O72-+6S2O32-+14H+>2Cr3+ + 3S4O62- + 7H20 A. H+ B. Cr6+ C. S4O62- D. S2+ E. O2- I come out with Cr2O72 but that's not an answer so my next one is B. Cr6+ am I correct?

chemistry

How could you use a precipitation reaction to separate the following pair of cations: K^+ and Hg2 ^2+? (write the formula and net formula for each reactant)? The answer is Hg2 ^2+ (aq) + 2Cl- (aq) = HgCl2(s) but how do I work it out?

CHEMISTRY

A FALSK CONTAINS 49.8 mL OF 0.150 CALCIUM HYDROXIDE. HOW MANY MILLILITERS OF 0.500 SODIUM CARBONATE ARE REQUIRED TO REACT COMPLETELY WITH THE CALCIUM HYDROXIDE IN THE FOLLOWING REACTION? Na2CO3(aq)+ Ca(OH)2(aq)¨CaCO3(s)+2NaOH(aq)

Chemistry

calculate the volume of hydrogen produced from .025g of aluminum and sufficient HCl at 21 degrees Celsius and 755 torr according to the following reaction: Al(s) + HCl(aq)--------- AlCl3 (aq) + H2(g) Volume of H2________ml

Science

What mass of iron metal can be obtained from the reaction of 45.6kg Iron (III) oxide Fe3O4 with carbon monoxide CO as given in the following equation? Fe3O4 + 4CO = 3Fe + 4CO2

Science

What mass of iron metal can be obtained from the reaction of 45.6kg Iron (III) oxide Fe3O4 with carbon monoxide CO as given in the following equation? Fe3O4 + 4CO = 3Fe + 4CO2

chemistry

For the following reaction Co(g)+H2o(g)=Co2(g)+H2(g) If the initial concentrations of Co and H2o are 1.00 mol in a 50 L vessel, what is the number of mole of each species at equilibrium, if the equilibrium constant Kc= 0.85 at 1000 C? please can any one explain how to do this ?

chemistry

Materials -sandwich-sized plastic ziplock bag -graduated cylinder -paper cup -rubber band -measuring spoons -vinegar -baking soda -twist-tie (like the closure for a loaf of bread) Part 1: The Reaction 1.Use the paper cup during this part of the experiment. 2.Measure out 25.0 ...

Chem

1)Which cations should form soluble sulfate compounds from (Sodium, calcium, silver, copper 2)? 2) which anions should form precipitates with barium ions from (sulfate, carbonate and iodide?) 3) which anions should form precipitates with silver ions? Write net ionic equations ...

chemistry

Topic: Iodometry 1. The importance of precipitating the Cu2+ ions using NH3 and redissolving it with acetic acid 2. What are other means of detecting endpoint in iodometry aside from adding starch indicator 1. A pH that is too low leads to excessive oxidation of iodide ion to ...

chem

The rate data from a chemical reaction shows that doubling the concentration of A with the concentration of B remaining constant causes the rate to increase by a factor of four. What is the reaction order for [A]? a. 0 b. 0.5 c. 1 d. 2 e. 3

biochem

When making Aspirin, I know that sulfuric acid is used as a catalyst. But i was wondering 1.) if the reaction would happen without the cataylst and 2.) can other substances be used as a cataylst in this reaction?

Chem

2 H2O (l) → 2 H2 (g) + O2 (g) Using the thermodynamic values to calculate accurate values of ΔHr and ΔSr, will the reaction be product favored at high temperature? Why? r stands for reaction

organic chemistry

what product is formed from 1-bromo-2 methyl-cyclohexane reaction with CH3ONa and CH3OH...from a substitution reaction ...I got 1-CH3OH-2methly-cyclohexane but it's wrong. Not sure how to do it

science

Explaini why the observation if a preciiitate forming may be evidence of a chemical reaction.What other evidence would youneed to gather to be sure that a chemical reaction has taken place?

Chemistry

For the reaction Al(s) + 3 HCl(aq)->AlCl3(s) +3/2 H2(g) it was observed that when 4.00g of aluminum reacted with excess HCl, exactly 30,0 kJ of heat was released. What is the delta H for this reaction? I do not understand how to get the delta H value.

chemistry

In a particular redox reaction, Cr is oxidized to CrO42– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Phases are optional. Cr + Cu2+ = CrO42- + Cu+

Dr.Bob222 Chem

I believe that you are correct because you have more experience in G-chem then I have. But how does doubling the reaction rate double the k value? Isn't k just a constant for a particular reaction?

chemistry

A reaction produced 0.40 mmol of H in a buffered solution which contained 300ml of 0.06M succinate buffer, pH is 4. What was the pH of the medium after the reaction was completed? The pKa of succinate buffer is 4.21

Chemistry

You are given the following data. P4(s) + 6 Cl2(g) 4 PCl3(g) ΔH = -1225.6 kJ P4(s) + 5 O2(g) P4O10(s) ΔH = -2967.3 kJ PCl3(g) + Cl2(g) PCl5(g) ΔH = -84.2 kJ PCl3(g) + 1/2 O2(g) Cl3PO(g) ΔH = -285.7 kJ Calculate ΔH for the following reaction. P4O10(s...

Phenol/Nitirc Acid Reaction

Is it possible to illustrate the reaction mechanism for phenol with nitric acid? no well thank you, you have been most helpful

Chem II

The rate constant for a reaction at 305.0 K is two times the rate constant at 295.0 K. The activation energy of the reaction is ______ kJ mol

chemistry

Write an equilibrium constant expression for the chemical reaction of ammonia with water. (In this reaction assume that the concentration of water will remain constant)

Chem: Two questions

Identify the two types of reactions: 1. A+B--> Answer: Synthesis Reaction 2. A+BC-->AC+B Answer: Single Replacement or Substitution Reaction THANK YOU !

Chem15

The reaction CO(g) + H2O(g)--> CO2(g) + H2(g) has Kc = 102 at 500 K. If a reaction mixture initially contains 0.154 M CO and 0.154 M H2O, what will be the equilibrium concentration of H2?

Physics

Before a nuclear reaction, there is 0.01000 kg of uranium. After the nuclear reaction, there is 0.00950 kg of uranium. How much energy was released? (h = 6.63 × 1034 Js)

Chemistry

The rate of a reaction A ---> B is expressed by the rate expression rate=k(A)2. If the molar concentration of A is tripled, the rate of the reaction should increase by a factor of some many?

Chemistry

In a given 1st order reaction A ---> products, the initial concentration of A is 0.40 M. What will be the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds?

Chemistry

In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction?

Chemistry

In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction?

math, question

Is there anywher i can go for further explanations on how to solve for the following statements on how to solve them: Dividing writing each result in simplest form & adding & subtracting The second sentence makes no sense to me.

Maths (Logs)

1.Write the following equation without logs log y = mx+ c This would be y = 10^(mx+c) right? 2. Explain why this fits the exponential model (in other words, it can be written in the form y = a x b^x where a and b are real numbers).

precalculus

find the trigonometric form of the following number: -7 + 4i I keep getting the wrong answer for these questions. mine was: square root of 65 (cos330.255 degrees + sin330.255i degrees)

Chemistry

Could someone please help me with the following questions; 1.) Formic acid reacts with hydroxybenzene to form? 2.) For the synthesis of methyl butanoate from an alkene and alcohol, what should I use? 3.) Synethesis of an alkene from 2-propanone. Thank you.

chemistry

According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 975 kJ of energy? SiO2(s) + 4 HF(g) → SiF4(g) + 2 H2O(l), ΔH°rxn = -184 kJ

chemistry

predict which three of the following five aqueous solutions should react with solid aluminum metal (the elemental form of aluminum): AgNO3, Na2CO3, CuSO4, CaCl2, Pb(NO3)2

chemistry

Given the following information about electronegativity, which binary compound would form covelant bonds with the greatest polarity? Element Electronegativity H 2.1 Li 1.0 S 2.5 Al 1.5 F 4.0 Cl 3.0 A. HCl B. LiF C. H2S D. AlH3

chemistry

Given the following information about electronegativity, which binary compound would form covelant bonds with the greatest polarity? Element Electronegativity H 2.1 Li 1.0 S 2.5 Al 1.5 F 4.0 Cl 3.0 A. HCl B. LiF C. H2S D. AlH3

BIOLOGY

Can TAMIFLU form a hydrogen bond with another molecule? Can TAMIFLU form a ionic bond with another molecule? Can TAMIFLU form a van der Waals forces bond with another molecule?

Spanish

Write the correct form of ser. Tu y tus padres________________de Puerto Rico? Which is the correct form? 'son' or 'sois' and why? Muchas Gracias

Pre-Cal

Find the component form of v given its magnitude and the anlge it makes with the positive a-axis. v=3 v in the direction 3i + 4J Would the component form be (3,4)?

math

standard form numbers are used around the world for....... 1:speed of light i need 3 more situations when you use standard form

Math

Use the digits 4'5'6'7' and 8 once each to write an odd five-digit number . Write it both in standard form and in word form

Chemistry - Correction

I just wanted to be sure if my answers make any sense. Thank you; For the reaction of ammonia: N2(g) + 3H2(g) --> 2NH3(g) suppose equilibrium has been established. Explain how and why the position of equilibrium will shift in response to the following changes: (a) ...

english

Which of these is true of the novel form when it was first introduced? 1.Its status as an art form was questioned. 2.It appealed to the highly educated. 3.It was nonfiction rather than fiction. 4.It satirized the working class. i think its 2? am i right?

how to start your own daycare basic steps

one example of a form that would be created for staff at a child care centeris a/an a.fingerprint form b.enrollment application c.billing notice my answer a

Maths

How many silver coins, 2cm in diameter and of thickness 2 mm, must be melted to form a showpiece in the form of a frustum of a cone having height 9 cm and radii of the outer circular ends as 5cm and 3cm?

Chemistry 101

A solution of .12 L of 0.160 M KOH is mixed with a solution of .3 L of 0.230 M NiSO4. the equation for this reaction is: 2KOH (aq)+NiSO4 (aq) ----->K2SO4 (aq)+Ni(OH)2 (s) .89 grams of Ni(OH)2 precipitate form I need to know the concentration remaining in the solution of: 1...

Biology

Can someone help me correct my answers and help me answer the questions not answered yet? Electron Tansport 1. Whats is the purpose of this pathway? 2. Where does it take place Mitochandria 3. What does this reaction need to proceed? Hydrogen,NADH and FADH2 4. What is produced...

Parts of speech

The following phases are bullet points in a letter. Which one is not in parallel form? a. Increase sales support staff b. Don't forget maketing plan c. Run market test with Group A d. Decrease overhead.

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