# a certain reaction has the following generaln form

28,046 results, page 44
1. ## biochemistry

Enzyme X is a highly pigmented protein that imparts the characteristic color to certain blue-green algae. It also facilitates a reaction necessary to the survival of this species; we can follow the kinetics of this reaction by measuring the conversion of

asked by Ama on November 2, 2012
2. ## chem

A calorimeter contains 16.0ml of water at 15.0degrees celsius. When 1.60g of X(a substance with a molar mass of 46.0g/mol) is added, it dissolves via the reaction X(s)+H20(l)->X(aq) and the temperature of the solution increases to 25.0degrees celsius.

asked by tomi on October 8, 2008
3. ## Anatomy

I'm posting this again today hoping someone can clarify this for me- I have two question 1.In a dehydration synthesis reaction which of the following occur- a. hydrogen and oxygen are removed from the reactant b. water is added to the reactants c. water is

asked by Aubrey on September 13, 2011
4. ## Temperature Problem

Q: A reaction rate has a constant of 1.23 x 10-4/s at 28 degrees C and 0.235 at 79 degrees C. Determine the activation barrier for the reaction. A: My work thus far: ln(1.23 x 10-4/0.235)=(Ea/8.314)(1/301.15-1/352.15) -7.551=(Ea/8.314)(0.0048090535)

asked by Amy on February 2, 2013
5. ## Chemistry

(a) Which of the following are requirements for anionic polymerization? 1-A double bond 2- End groups which can react by releasing a small molecule 3- A strong base to initiate the reaction 4- A strong acid to initiate the reaction 5- An

asked by Saraa on November 26, 2013
6. ## Chemistry

A calorimeter contains 30.0 mL of water at 11.0 degrees C. When 1.50 g of X (a substance with a molar mass of 65.0 g/mol) is added, it dissolves via the reaction: X (s)+H2O (l) ---> X (aq) and the temperature of the solution increases to 26.0 degrees C.

asked by Abby on June 21, 2012
7. ## chemistry

The alcoholic fermentation of350 g/l glucose syrup ceases when the alcoholic degree of the mixture attains 16º (16ml ethanol in 100ml of the solution) Write the reaction of the fermentation reaction. Consider the fermentation of 100L of the glucose syrup.

asked by angy on February 27, 2017
8. ## Biochem

Glycerol 3-phosphate dehydrogenase catalyzes the reversible reaction: G3P + NAD+ --> NADH + H+ + DHAP If in the cell, the concentrations of G3P, NAD+, NADH, and DHAP are 2 mM, 4 mM, 6 mM, and 8 mM respectively. Determine if the reaction spontaneous as

asked by Mia S on December 8, 2015
9. ## Science Chemistry

LIST: SODIUM CARBONATE. CALCIUM CARBONATE. ZINC SULFATE. ZINC NITRATE. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a

asked by Charlotte on January 7, 2017
10. ## Science Chemistry

LIST: SODIUM CARBONATE. CALCIUM CARBONATE. ZINC SULFATE. ZINC NITRATE. (a) State a pair of chemicals from the list above that can be used to prepare zinc carbonate by precipitation reaction involving mixing 2 aqueous solutions together. (b) Write a

asked by Charlotte on January 7, 2017
11. ## Chemistry

A 28.4288 g sample of impure magnesium car- bonate was heated to complete decomposition according to the equation MgCO3(s) ! MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

asked by Brett on September 21, 2012
12. ## Chemistry

A student is given a 5.000g sample to analyze composed of tin metal with a small amount of a zinc impurity. The student dissolves the metal in concentrated nitric acid, allows the reaction to continue to completion, and heats the mixture to leave 6.341g of

asked by Nicholas on September 18, 2017
13. ## half-life

1. The half-life of a first-order reaction is 9.89 minutes. How many minutes will have elapsed after 27 half-lives? My answer is 267.03. 2. The half-life of a second-order reaction is 2.508 days. How many days will have elapsed after 8 half-lives? My

asked by Issac on February 7, 2007
14. ## Chem

Part A : This is the first law of thermodynamics question. case 1 - the system expands and the surroundings get hotter case 2 - the system expands and the surroundgins get colder case 3 - the system contracts and the surroundings get hotter case 4 - the

asked by AY on November 4, 2010
15. ## structural formulae

REACTION 1 IS A CARBON COMPOUND CONTAINING AN ALCOHOL FUNCTION GROUP + REACTION 2 IS A CARBON COMPOUND CONTAINING A CARBOXYLIC GROUP. IM TRYING TO UNDERSTAND THE PRODUCT FORMULAE. CAN YOU TELL ME HOW THESE TWO FUNCTION GROUPS REACT, AND THE RELEVANCY OF CH

asked by honey on March 9, 2007
16. ## Chemistry

Consider the reaction: Mg + I2 -> MgI2. Identify the limiting reagent in of the reaction mixtures. 1. 100 atoms of Mg and 100 molecules of I2. 2. 150 atoms of Mg and 100 molecules of I2. 4. 0.16 mol Mg and 0.25 mol I2. 5. 0.14 mol Mg and 0.14 mol I2. 6.

asked by Anonymous on August 16, 2010
17. ## chemistry

Copper sulfide is formed when copper and sulfur are heated together. In this reaction, 132 g of copper reacts with 53 g of sulfur. After the reaction is complete, 9 g of sulfur remains unreacted. What is the mass of copper sulfide formed?

asked by Mg Good on October 6, 2014
18. ## chemistry

2. The voltage of an electrochemical cell depends on the redox reaction occurring in the cell. Given a redox reaction below: Zn(s) + Pb2+(aq) --> Zn2+(aq) + Pb(s) Pb2+(aq) + 2 e--->Pb(s)Eº = -0.13V Zn2+(aq) + 2 e--->Zn(s)Eº = -0.76V Calculate the E.M.F

asked by bliss on March 9, 2016
19. ## chemistry

Free Energy and Temperature A certain reaction is non-spontaneous at lower temperatures but becomes spontaneous when the temperature is raised sufficiently. For this reaction, S is positive. S is negative. H is negative. G becomes positive at higher

asked by tt on October 18, 2011
20. ## c

The voltage of an electrochemical cell depends on the redox reaction occurring in the cell. Given a redox reaction below: Zn(s) + Pb2+(aq) --> Zn2+(aq) + Pb(s) Pb2+(aq) + 2 e--->Pb(s)Eº = -0.13V Zn2+(aq) + 2 e--->Zn(s)Eº = -0.76V Calculate the E.M.F

asked by bliss on March 9, 2016
21. ## chemistry

The voltage of an electrochemical cell depends on the redox reaction occurring in the cell. Given a redox reaction below: Zn(s) + Pb2+(aq) --> Zn2+(aq) + Pb(s) Pb2+(aq) + 2 e--->Pb(s)Eº = -0.13V Zn2+(aq) + 2 e--->Zn(s)Eº = -0.76V Calculate the E.M.F

asked by bliss on March 9, 2016
22. ## physics

This graph in the figure (Figure 1) shows how the temperature of an initially solid sample changes as time goes by when it is placed above a flame that delivers a constant heating power (that is, a fixed amount of energy input in the form of heat each

asked by deeyn on September 30, 2014
23. ## Chemistry

IS THIS RIGHT? Experiments were performed with four metals and solutions of their ions: A-A^+, B-B^2+, C-C^2+, D-D^2+. The results of the experiments were: D^+2 + C ---> No reaction B^+2 + C---> B + C^+2 A^+ + B ---> A + B^+2 a.) Write the equation for

asked by Julia on November 7, 2011
24. ## biology

using lactose and a ph value of 3,5,7,9,11, Why was there no increase in the reaction rate with 8.0 g. of substrate as compared to 4.0 g. of substrate? What would you need to add to see an increase in the reaction rate with 8.0 g. of substrate?

asked by Dancerdi on February 8, 2011
25. ## 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

asked by Donald on December 21, 2013
26. ## physics

The forces acting on the arm of a person lifting a dumbbell. The force F is the force pulling on the hand due to the weight of the dumbbell, the force Warm is the weight of the arm and T is the tension due to the muscles connecting the arm and the trunk.

asked by physics student on October 6, 2009
27. ## Chemistry. Percent mass...

A 1.009 g mixture of the solid salts Na2SO4 (molar mass= 142.04) an Pb(No3)2 (molar mass= 331.20) form an aqueous solution with the precipitation of PbSO4 (molar mass= 303.26). The precipitate was filtered and dried and its was was found to be .471 g. The

asked by Sarah on November 21, 2008
28. ## chemistry

a.) Write the balanced complete combustion reaction for ethane (C2H6), producing CO2 and water vapour. Make sure to include phases. Also, make sure that the stoichiometric coefficients are whole numbers and are not fractions. b.) What is the enthalpy of

asked by BILLY on October 3, 2014
29. ## chemistry

What will happen in this reaction: NH3 + H2 = NH4 when x amount of NH4 is added, equilibrium is reached, then 2x is removed. to the product side because the amount taken out is greater than amount that is added? if amount added is x and amount removed is

asked by bme1 on April 23, 2010
30. ## Chemistry

Hydrogen gas is used for many purposes, including the hydrogenation of vegetable oils to make margarine. The most common industrial process for producing hydrogen is "steam reforming", in which methane gas, CH4, from natural gas reacts with water vapor to

asked by Lily on November 16, 2016
31. ## BIOLOGY

A SALT IS OBTAINED AS A REACTION BETWEEN A SALT (and water) IS OBTAINED AS A REACTION BETWEEN a base and an acid. See: http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/acidbase.html http://lrs.ed.uiuc.edu/students/erlinger/water/background/ph.html I

asked by CAROLINE on September 30, 2006
32. ## Chemistry

(a) Which of the following are requirements for anionic polymerization? --A double bond --End groups which can react by releasing a small molecule --A strong base to initiate the reaction --A strong acid to initiate the reaction --An electron-withdrawing

asked by Anon on November 19, 2013
33. ## Chemistry

1. net ionic equation for the reaction of tin (II) and solid mercury chloride to yield tin (IV), liquid mercury and chloride ion 2. net ionic equation for the reaction between solid SbOOH and H2S I am not too sure about my equations, so I was wondering if

asked by Soojung on July 20, 2009
34. ## Chemistry

1.Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine). The unbalanced equation is NaCl(aq) + H2O(ℓ) → NaOH(aq) + Cl2(g) + H2(g). If the brine contains 163 g of NaCl, how

asked by Sarah on February 24, 2015
35. ## Calculus

A wire 17 inches long is cut into two pieces. One piece is bent to form a square and the other is bent to form a rectangle that is twice as wide as it is high. How should the wire be cut in order to minimize the total area of the square and rectangle?

asked by Selena on June 13, 2015
36. ## French

I am stumped on these two questions. Unscramble the following words tp make sentences. Be sure to use the correct form of avoir. 1. j'/ordinateur/un/avoir 2. de/n'/vous/avoir/pas/chaise I know what the words mean but im not quite sure of the correct form

asked by Nicky on September 7, 2008
37. ## Math

Describe and correct the error in writing the number 81,700,000 in scientific notation. Standard form 81,700,000 product form 81.7*100,000 scientific notation 81.7*10

asked by Anonymous on October 3, 2010
38. ## Chemistry

Following question I need help with part b) Please verify my answer for part a) too if possible. Consider the following reaction for silver tarnishing: 3Ag2S(s) + 2Al(s) -> 6Ag(s) + Al2S3(s) a. State the oxidation number for each element in the reaction.

asked by Dexter on June 14, 2011
39. ## Chemistry

When 0.655 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 107C 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

asked by Anonymous on February 25, 2008
40. ## Spanish 1

The directions on this question say, "Usando los verbos de la lista, dé el mandato formal que mejor completa cada oración." My choices to choose from are: dar estar ir ser The question is: ________muchas atenciones a los invitados. I thought it was dar,

asked by Mary on December 8, 2011
41. ## chemistry

Using the activity series, write a balanced chemical equation for the following reactions: 1. iron metal is added to a solution of copper (II) nitrate 2. zinc metal is added to a solution of magnesium sulfate 3. hydrobromic acid is added to tin metal 4.

asked by Jessica on March 27, 2011
42. ## math

1. The equation, in general form, of the line that passes through the point (3,4) and is perpendicular to the line 5 x + 5 y + 9 = 0 is Ax + By + C = 0, where a=? b=? c=? 2.The equation of the line that goes through the points ( -9 ,-6 ) and ( -6 ,-3 ) can

asked by Allie on August 30, 2009
43. ## Chemistry Eq. Question

3H2(g) + N2(g) reverse reaction arrow 2NH3(g) What factors would affect the equilibrium constant for the reaction above? (Select all that apply.) increasing the H2 concentration decreasing the NH3 concentration increasing the temperature decreasing the

asked by Jeena on March 29, 2010
44. ## Chem

Calculate ΔGo (in J) for 1 moles of electron(s) in each half-reaction and a standard potential of 0.34 V. I got .86 Calculate Keq for 2 moles of electron(s) in each half-reaction and a standard potential of (-0.44) V. I got -.36 Calculate the potential

asked by Anonymous on April 10, 2013
45. ## AP Chemistry

Consider the following reaction: CH3X + Y --> CH3Y + X At 25 degrees Celcius the following two experiments were run, yielding the following data: Experiment 1: [Y]0 = 3.0 M [CH3X] (mol/L) Time (hours) 7.08*10^-3 1.0 4.52*10^-3 1.5 2.23*10^-3 2.3 4.76*10^-4

asked by Kyle on January 1, 2015
46. ## Chemistry

Over the years, the thermite reaction (mixing of solid iron (III) oxide with aluminum metal) has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. A. Write a balanced equation representing the reaction. B.

asked by Stockton on August 6, 2013
47. ## Mechanics NYA

Assume you are driving a car at a constant speed of 75.0 km/h. Suddenly you see a deer standing on the highway and you must put on the brakes. Your reaction time (time elapsed between the moment you see the deer and your foot hitting the brakes) is 0.116

asked by stacey on September 16, 2015

1. Write the verb form for: yo/hacer. 2. Write the verb form for: ellos/hacer. 3. Write the verb form for: nosotros/hacer. Thank You

asked by Deborah on January 24, 2013

1. Write the verb form for: yo/hacer. 2. Write the verb form for: ellos/hacer. 3. Write the verb form for: nosotros/hacer. Thank You.

asked by Deborah on January 24, 2013
50. ## chemistry

Using the half-reaction method, balance the redox reaction below. Show your work; partial credit will be given. I- + Br2 → IO3- + Br- Write the reduction and oxidation half-reactions. Balance them for atoms. Balance each of the half-reactions for charge.

asked by Anonymous on April 27, 2012
51. ## Ochem

What is the purpose of refluxing? Which reaction conditions are indicated with reflux? Will you apply heat? How do you know the temperature at which you should reflux? I think it is "A reflux system is used to condense vapours escaping from the hot flask.

asked by Jay on July 5, 2006
52. ## Spanish

Nosotros __________ al lado de un lago. vivimos vivemos vivir viven ¡_______ la mesa! Pongo Ponga Pone Pon ¡_______ las ventanas! Limpia Limpian Limpias Limpiar Which would be true for forming an informal command? You use the infinitive of the verb. You

asked by lilkakes on January 16, 2019
53. ## Chemistry

How you do this? can you do the first one, i'll try the second one if you can explain Perform the following operations and give the answear in standard exponential form with the correct number of significant figures 1) 37.2mL + 18.0mL + 380mL= 2) 0.57cm x

asked by Bryan on January 11, 2007
54. ## Spanish

How exactly will I do this? I seriously need help yet,I can't even attempt this. My teacher hasn't taught me this stuff as yet. So help would be appreciated. This is what I'm working on: Command form(imperative mood)negative familiar/polite. I have to

asked by John on May 9, 2008
55. ## chemistry

Show the calculation of (1) the expected grams of urea (CH4N2O) formed in the reaction of 6.5 grams of lead cyanate (Pb(CNO)2) with excess ammonium hydroxide and then show the calculation of (2) the % yield if the actual yield of urea is 1.89 grams.

asked by emily on March 12, 2015
56. ## chemistry.

in the titration between Na2CO3 and HCl... 1) at the first end point what reaction is stoiciometrically complete? 2)At the start of titration where HCl=0 is the solution acidic or basic. ExPlain? 3) At the 2nd end point what reaction is stiociometrically

asked by zoe on March 13, 2011
57. ## Chemistry

Iron metal reacts with oxygen gas to produce iron(III) oxide. If you have 12.0 moles of iron, for complete reaction you need: (HINT you need the balanced chemical reaction!) A) 9.0 moles of O2 and produce 3.0 moles of Fe2O3 B) 9.0 moles of O2 and produce

asked by Petey on April 9, 2016
58. ## Chemistry

Rxn 1:     4 NH3(g) + 5 O2(g) ⇌ 4 NO(g) + 6 H2O(g)         If the equilibrium constant, Kc, for Rxn 1 is 0.0015, determine the equilibrium constant, Kc, for the    reaction:   2 NH3(g) + 5/2 O2(g) ⇌ 2 NO(g) + 3 H2O(g) I'm not sure how

asked by Sean on January 25, 2017
59. ## chemistry

1 liter of a 1 M lithium hydroxide solution is added to 1 liter of a 1 M barium chloride solution, and a precipitate forms. What ions are left in solution after the reaction is complete? What ions are left in solution after the reaction is complete?

asked by Elise on November 22, 2010
60. ## physics

A resistor (R = 900 ), a capacitor (C = 0.25 µF), and an inductor (L = 2.0 H) are connected in series across a 240 Hz AC source for which Vmax = 140 V. Calculate values for the following. ---I only need help with part c---- c) the phase angle between the

asked by asmi on August 5, 2007
61. ## chemistry

When a mixture of two black powders is heated, it gave off a gas which turned lime water milky Give a chemical equation to show the reaction between gas and lime water Red scales residue can be seen on the black residue. Name the red scales The red scale

asked by saurav on March 17, 2015
62. ## CHEMISTRY

A student combusted 0.500g of purified aluminum power with excess oxygen in an oxygen atmosphere according to the reaction, 4Al(s) + 3O2(g)= 2Al2O3(s) A) What is the limiting reactant? B) How many moles of Al were used? C) How many moles of Al2O3 would

asked by Gina on October 29, 2014
63. ## Chemistry

The equation for the reaction that occurs when lead(II) oxide is heated with coke in a blast furnace is: 2PbO+c -->2Pb+CO2 (i)State, with a reason, whether PbO is oxidised or reduced in this reaction. (ii)Calculate the minimum mass, in tonnes, of coke

asked by Qindan on April 22, 2013
64. ## Spanish

1. Mi madre insiste en que ____ en el aeropuerto a las 2. A) estabamos B) estemos C) estamos D) estar I'm confused between B and C because I don't know if I should use the indicative or subjunctive form. Please help. 2. Prohiben que los turistas les ____

asked by Daniella on March 22, 2018
65. ## math 4

A formed planted 12/18 of his form with pechay how many thirds of the form was planted with pechay

asked by jamer on September 30, 2015
66. ## gen chem 1

You carefully weigh out 20.00g of \rm CaCO_3 powder and add it to 81.00g of \rm HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 92.80g . The relevant equation is \rm

asked by bc on May 22, 2013
67. ## ap chemistry

A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a substance with a molar mass of 59.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5 . Calculate the enthalpy change, , for this reaction per mole

asked by emily on December 3, 2012
68. ## ap chem

A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a substance with a molar mass of 59.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5 . Calculate the enthalpy change, , for this reaction per mole

asked by JOSH on December 3, 2012

I'm posting this again today hoping someone can clarify this for me-I've posted it prior but no one answered yesterday so I'll try again. Thank you in advance I have two question 1.In a dehydration synthesis reaction which of the following occur- a.

asked by Aubrey on September 13, 2011
70. ## Chem 1010

Aqueous solutions of sodium sulfide and silver nitrate are mixed to form solid silver sulfide and aqueous sodium nitrate. The complete ionic equation contains which one of the following terms (when balanced in standard form)?

asked by Sirena on April 15, 2012
71. ## Chemistry

Which group in the periodic table (1A... 5A) reacts with H2 to form compounds with the general formula MH2? Which reacts with F2 to form compounds with the general formula MF2? Any help would be great, thanks. Wouldn't Group IIa fit this bill?

asked by Londy on April 20, 2007
72. ## Chemistry

If the reaction Fe2N(s) + 3/2H2(g) -> 2Fe(s) +NH3(g) comes to equilibrium at a total pressure of 1 bar, analysis of the gas shows that at 700. and 800.K, PNH3/PH2=2.165 and 1.083 respectively, if only H2(g) was initially present in the gas phase and

asked by Katie on November 23, 2010
73. ## BIOLOGY

Consider the following 45 base-pair (bp) DNA sequence: 1 10 20 30 40 | . | . | . | . | . 5’-CGCACCTGTGTTGATCACCTAGCCGATCCACGGTGGATCCAAGGC-3’ ||||||||||||||||||||||||||||||||||||||||||||| 3’-GCGTGGACACAACTAGTGGATCGGCTAGGTGCCACCTAGGTTCCG-5’ You also

asked by Bidex on November 8, 2013
74. ## biology

Consider the following 45 base-pair (bp) DNA sequence: 1 10 20 30 40 | . | . | . | . | . 5’-CGCACCTGTGTTGATCACCTAGCCGATCCACGGTGGATCCAAGGC-3’ ||||||||||||||||||||||||||||||||||||||||||||| 3’-GCGTGGACACAACTAGTGGATCGGCTAGGTGCCACCTAGGTTCCG-5’ You also

asked by Anonymous on May 2, 2013
75. ## Philosophy

For the following argument, a) Translate into standard form (if not already in standard form), b) symbolize to simplify, and then c) determine whether the syllogism is valid or invalid, explaining why by reference to rules, AND by showing the appropriate

asked by Anne on December 14, 2006
76. ## chmistry

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

asked by alexis on February 12, 2007
77. ## Chemistry

What mass of NO2 is formed by the complete reaction of 2 mol O3 with excess NO in the reaction? O3 + NO --> O2 + NO2 I know the molar mass of O3 is 48 g/mol and NO2 46 g/mol a) 23.0 g b) 46.0 g c) 92.0 g d) 96.0 g

asked by Anonymous on May 7, 2017
78. ## Chemistry HELP

In a constant-pressure calorimeter, 50.0 mL of 0.300 M Ba(OH)2 was added to 50.0 mL of 0.600 M HCl. The reaction caused the temperature of the solution to rise from 21.73 °C to 25.82 °C. If the solution has the same density and specific heat as water,

asked by wisa bedalie on October 18, 2014
79. ## Geometry

Triangle $ABC$ is isosceles with point $A$ at the point $(2, 7)$, with point $B$ at $(-2, 0)$ and with point $C$ at $(3, -1).$ Triangle $ABC$ is reflected over $\overline{BC}$ to form $\triangle A'BC$. Triangle $A'BC$ is reflected over $\overline{A'C}$ to

asked by Praphul on February 29, 2016
80. ## Calculus

Two cars start moving from the same point. One travels south at 60 mph and the other travels west at 25 mph. At what rate is the distance between the cars increasing 2 hours later? Let x = the distance covered by the south traveling car. Let y = the

asked by Robin on June 28, 2013
81. ## Chem -plz check work

so i've worked on this some more, now I am asking if someone will plz check my work 2 half cells in a galvanic cell consist of one iron Fe(s) electorde in a solution of iron (II) sulphate FeSO4(aq)and a silver Ag(s) electrode in a silver nitrate solution,

asked by Sarah H on June 3, 2008
82. ## Science

4)Explain why,when a soccer ball is kicked, the action and reaction forces don't cancel each other. a)The force of the player's foot on the ball greater than the force on the ball on the player's foot. b)They act on two different objects. c)The reaction

asked by Ira on March 14, 2010
83. ## Ratios of Similar Figures

1. Write the following ratio in simplest form: 32 min : 36 min a. 8 : 9 b. 8 : 36 c. 32 :9 d. 128 : 144 2. In a sports equipment locker, there are 81 balls and 45 baseball mitts. Write the ratio of balls to baseball mitts in simplest form. a. 9 : 5 b. 10 :

asked by Jman on October 22, 2012
84. ## Geomertry

Points c,a,b are connected to form a triangle along the surface of a sphere. Points R,E,N are connected to form a triangle on a euclidean. What is true between spherical and euclidean geometry?

asked by bigvol on December 3, 2015
85. ## Geomertry

Points c,a,b are connected to form a triangle along the surface of a sphere. Points R,E,N are connected to form a triangle on a euclidean. What is true between spherical and euclidean geometry?

asked by pizzarolll on December 3, 2015
86. ## pre-calculus

How do you write the standard form of the equation of the line passing through the points M(-4,-2) and N(4,7)? How do you find the slope-intercept form of the equation of the line passing through the points P(2,-9) and Q(3,-7)?

asked by maxine on May 13, 2009
87. ## math

I have no idea how to do this: Express the ratio in simplest form. 5 yards to 24 feet convert yards to feet: 12 x 5 = 60 ft. Would the answer be 60:24 ? is this the simplest form if the answer is correct?

asked by Bart on April 13, 2010
88. ## Chemistry

A certain indicator, HA, has a Ka value of 1.3 × 10-6. The protonated form of the indicator is blue and the ionized form is red. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?

asked by Nancy on February 26, 2013
89. ## English

1. We can use less water when we do the dishes. 2. We can use less water when we are doing the dishes. 3. We can use only a little water when we wash a car. 4. We can use only a little water when we are washing a car. ===================== Are they all

asked by rfvv on April 14, 2015
90. ## pre-calculus

How do you write the standard form of the equation of the line passing through the points M(-4,-2) and N(4,7)? How do you find the slope-intercept form of the equation of the line passing through the points P(2,-9) and Q(3,-7)?

asked by maxine on May 13, 2009
91. ## REACTION KINECTICS

The autocatalytic reaction of A to form Q is one that accelerates with conversion. An example of this is shown below: A+Q~Q+Q However, the rate decreases at high conversion due to the depletion of reactant A. The liquid feed to the reactor contains 1 mol

asked by BALOCH on September 17, 2014
92. ## Chemstry

For the reaction A(g) + B(g) C(g) + D(g) the equilibrium constant K is defined as K = Y(sub y) * Y(sub D) / (Y (sub A) * Y(sub b)) where y is the molar fraction of the gas phase of a species At 620.00 K, the equilibrium constant is 1.100. Suppose the feed

asked by Simon on July 11, 2012
93. ## chem

empty cruble-34.69g crucible+ magnesium- 34.86g crucible+magnesium oxide - 34.97g How can i find the number of moles of magnesium present at the start of the reaction How can i also find the total number of magnesium oxide molecules present at the end of

asked by christine k on November 18, 2014
94. ## science

I need help findnig out the error involved with using a graduated cylinder and gas collection tube to calculate the rate of reaction. We beed more details than you have provided. What kind of experiment did you do? What reaction was involved? How did you

asked by Jannette on March 8, 2007
95. ## biochemistry

when a reaction AB starts, there is three times as much product as reactant. When it reaches equilibrium, there is twice as much product as reactant. Show how to calculate the standard change in gibbs free energy for this reaction. I did it but I'm not

asked by Jennifer on November 20, 2009
96. ## biology

sir, there was a question in my biology test that required us to draw a graph of concentration of sucrose solution against rate of reaction. so how do I plot the graph? If i follow the question's requirement, i have to put the concentration of sucrose

asked by shakti on March 28, 2012
97. ## biology

sir, there was a question in my biology test that required us to draw a graph of concentration of sucrose solution against rate of reaction. so how do I plot the graph? If i follow the question's requirement, i have to put the concentration of sucrose

asked by shakti on March 28, 2012
98. ## chemistry

For the reaction below, KP = 1.6 × 106 at 400.0 °C. HCHO2( g ) CO( g ) + H2O( g ) A mixture of CO( g ) and H2O(l ) was prepared in a 2.00 L reaction vessel at 25 °C in which the pressure of CO was 0.177 atm. The mixture also contained 0.391 g of H2O.

asked by alifa on February 4, 2013
99. ## probability

Consider a Poisson process with rate λ. Let N be the number of arrivals in (0,t] and M be the number of arrivals in (0,t+s], where t>0,s≥0. In each part below, your answers will be algebraic expressions in terms of λ,t,s,m and/or n. Enter 'lambda' for

asked by JuanPro on April 29, 2014
100. ## Probability

Consider a Poisson process with rate λ. Let N be the number of arrivals in (0,t] and M be the number of arrivals in (0,t+s], where t>0,s≥0. In each part below, your answers will be algebraic expressions in terms of λ,t,s,m and/or n. Enter 'lambda' for

asked by A on May 1, 2014