# a certain reaction has the following generaln form

73,810 results, page 21

### Chemistry

At 25°C, K = 0.090 for the following reaction:H2O(g) + Cl2O(g) 2 HOCl(g) Calculate the concentrations of all species at equilibrium for each of the following cases. (a) 1.2 g H2O and 1.6 g Cl2O are mixed in a 1.4 L flask. (b) 1.2 mol pure HOCl is placed in a 1.9 L flask

### Chemistry

Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...

### Chemistry

Part A Calculate the standard enthalpy change for the reaction 2A+B --->2C +2D Use the following data: Substance Delta H(kJ/mol) A -263 B -391 C +203 D -523 Express your answer in kilojoules. MY ANSWER FOR PART A: Delta H =277 kJ PART B----THIS ONE I NEED HELP ON Express ...

### chemistry

A particular kind of emergency breathing apparatus-often placed in mines, caves, or other places where oxygen might become depleted or where the air might become poisoned-works via the following chemical reaction: 4KO2(s)+2CO2(g)--> 2K2CO3(s)+3O2(g) Notice that the reaction...

### chemistry

A particular kind of emergency breathing apparatus-often placed in mines, caves, or other places where oxygen might become depleted or where the air might become poisoned-works via the following chemical reaction: 4KO2(s)+2CO2(g)--> 2K2CO3(s)+3O2(g) Notice that the reaction...

### physics

Why is the following situation impossible? Emily challenges David to catch a $1 bill as follows. She holds the bill vertically with the center of the bill between, but not touching David’s index finger and thumb. Without warning, Emily releases the bill. David catches the ...

### Chemistry

In fertilizer manufacturing the cimpounds below are mixed together to form a composite fertilizer. My question is: Is there a reaction between SOLID ammonium phosphate, potassium chloride, ammonium nitrate, and superphosphate? (or any combination? or will they react if all are...

### chemistry

The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The value of the rate constant is 6.091*10^-3M^-1.s^-1. What is the initial rate of reaction in a reactor filled with AhF to a concentration of 6.0M? Express you ...

### 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 of avoir would be and ...

### Chemistry

The following reaction has a standard enthalpy of reaction of -146.0 kJ/mol: Cu2O(s) + 1/2 O2(g) -> 2CuO(s) The standard enthalpy of formation of Cu2O(s) is -168.6 kJ/mol. What is the standard enthalpy of formation of CuO(s)?

### Chemistry (Electrochemistry)

Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M Ti3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced reaction. Sn4+ + 2e- <...

### Chemistry re-post

Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M TI3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced reaction. Sn4+ + 2e- <...

### Chemistry (Electrochemistry)

Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M TI3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced reaction. Sn4+ + 2e- <...

### Chemistry due soon

What is enthalpy? A. Enthalpy is the kinetic energy of a system. B. Enthalpy is the heat involved in a reaction. C. Enthalpy is the temperature of a reaction. D. Enthalpy is the mass involved in a reaction. I think the answer is a or b

### Language arts

How do you form the perfect tense of a verb? A.Use the Helping verb will and the base form of the verb. B.Use a form of the verb be and the last particle of the verb C.Use a form of the verb have and the present participle of the verb. D.Use a form of the verb have and the ...

### chem

A hemoglobin molecule (molar mass =65000 g) can bind up to 4 oxygen molecules. In a certain experiment a .085-L solutoin containing 6.0 g of deoxyhemoglobin was reacted with excess of oxygen in a constant-pressure calorimeter of negligible heat capacity. calculate the enthalpy...

### Chemistry

Sodium reacts with chlorine gas according to the reaction:\ 2 Na (s) + Cl2 (g) ---> 2 NaCl (s) What volume of chlorine gas, measured at 687 mmHg and 313 K, is required to form 275 g of NaCl?

### Chemistry

Zinc and sulfur react to form zinc sulfide according to the equation Zn+S=>ZnS a) How many grams of ZnS will be formed? b) How many grams of the excess reactant will remain after the reaction is over?

### Math

The following are the number of apples sold in a certain market: 96, 186, 59, 171, 62, 58, 176, 91, 183, 167, 62, and 51. How many apples should an extra store sell to have a mean of 120?

### chemistry

At 25 C the following heats of reaction are known: 2CIf (g)+ O2(g) -> CL2O (g) + f2O Delta H rxn= 167.4 kj/mol 2CIf3(g) + 2O2 (g)-> Cl2O(g) + 3F2O(g) Delta H rxn= 341.4 2F2(g) + O2(g) -> 2F2O(g) Delta H rxn= -43.4kj/mol at the temperature, use Hess's Law to calculate ...

### solid mensuration

a certain city block is in the form off parallelogram. two of it's side are each 225 meters long, the other two sides are each 145 meters long. if the distance between the first two pair is 80 meters. find the area of the land in the block and the length of the diagonals.

### earth science

What may form when falling precipitation runs off the surface of the ground? Explain how the form of precipitation may affect runoff. I don't understand what they are asking. What do they mean by "What may form?" does it mean like a puddle? or mudslide? or something?

### Math

Considering the word Mathematics, what is the ratio of vowels to consonants? Write the ratio 3 ways. word form: colon form: fraction form:

### Math

Considering the word Mathematics, what is the ratio of vowels to consonants? Write this ratio 3 ways: Word form: Fraction form: Colon form:

### AP Chemistry

C2H2(g) + 2H2(g) --> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following table: C2H2(g) 226.7 kj/mol C2H6(g) -84.7 kj/mol [the values are the change in enthalpy] a. write the equation for the heat formation of ...

### Chemistry

Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb...

### Chemistry

Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb...

### English

1. Watching a variety of shows might expose us to things we might otherwise never come across in our own lives. (What is the meaning of 'come across' here? Some other similar expressions, please?) 2. We can bond over shared views by watching some TV shows together. (Is this ...

### Chem -3A

Please help me with this problem Avogadro's Law A chemical reaction occuring in a cylinder equipped with a movable piston produces 0.58 mol of gaseous product. If the cylinder contained 0.11 mol of gas before the reaction and had an initial volume of 2.11L, what was its volume...

### AP CHEM-- check work?

How many moles of ATP must be converted to ADP by the reaction ATP(aq) + H2O ---> ADP(aq) + HPO4-2(aq) + 2H+(aq) delta-G*= -31 kJ to bring about a nonspontaneous biochemical reaction in which delta-G*= +372 kJ? I did my work out like this..: 372 kJ x 1 mol/-31 kJ = -12 mol ...

### Chemistry

I posted before about designing a procedure to determine two unknowns (1 solid, 1 solution). The possible solutions were: NaCl, CaCl2, CuSO4, NaOH,Ba(OH)2, HCl, HNO3, or H2O. The reagents given are: NaOH, HCl, AgNO3, Zn metal, Na2SO4, and H2O. The procedure I've designed so ...

### science

Octane (C8H18) is a liquid that combusts with oxygen gas (O2) to form water (H2O) and carbon dioxide (CO2). Write a balanced chemical equation for this reaction and explain the scientific principle (statement) that requires the balancing of an equation to make it conform to ...

### chemistry

In the lab, you mix 30mL of 0.30M Na2SO4 with 10mL of 0.25M Ba(OH)2 to produce BaSO4 and NaOH. Calculate the theoretical yield (in moles) of BaSO4 produced from this reaction. State your answer in decimal form and round to two sig. fig. (not scientific notation).

### Chem. Again

28: You have a glass of pure water. Are chemical reactions occurring in the water? If so, what are they? If not, explain why not. 29: While investigating the effects of acid rain in your area, you discover a lake that is surprisingly resistant to changes in pH caused by acid ...

### Chem

An electrochemical cell based on the decomposition of H2O2 can be constructed based on the half-reactions in the table below. Half-Reaction | Standard Reduction Potential, E° H2O2+ 2e- => 2 OH- | 0.88 V O2+ 2 H2O + 2e- => H2O + 2 OH- | -0.15 V (d) Calculate the value of...

### Science

Hydrochloric acid and sodium hydroxide are mixed together to form salt and water. During the reaction, the temperature of the solution increases. Which of these best explains why this is considered to be a chemical change? No energy was destroyed. Heat was given off. It ...

### Chemistry

Why is energy released in order to react two atoms to form a compound? For instance the reaction between sodium metal and chlorine gas is highly exothermic and produces NaCl(s). Meanwhile when an atom loses an electron, it will be endothermic. Can someone try to explain this ...

### History

How should I start my reaction essay off? I looked up examples online and most sources say to state the title and the author but I'm not sure how to "form" the first paragraph. This is what I have so far.. After reading the article Survivors, I felt horrified, disgusted and ...

### Chemistry

Consider the following reaction: CH4 +2O2 -> CO2 + 2H2O. Delta H = -891 kJ Calculate the enthalpy change for each of the following cases: a. 1.00 g methane is burned in excess oxygen b. 1.00 x 10^3 L methane gas at 740. torr and 25 *C is burned in excess oxygen

### Chemistry

Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6Cl2(g) ! 4 PCl3(g) . A sample of PCl3 ofmass 280.7 g was collected from the reaction of 70.86 g of P4 with excess chlorine. What is the percentage yield of the ...

### Biology Help

Enzymes: a. increase the amount of energy release in a reaction b. decrease the amount of energy release in a reaction c. catalyze only redox reactions d. reduce the activation energy needed to for a reaction I think its d. or a. Help Please

### Chemistry

The reaction of iron and water vapor results in an equilibrium reaction, 3 Fe(s) + 4 H2O(g) ¡ê Fe3O4(s) + 4 H2(g) and an equilibrium constant of 4.6 at 850¡ÆC. What is the concentration of Hydrogen present at equilibrium if the reaction is initiated with 28 g of H2O and ...

### algebra

write the following where possible as a single number in index form: 2^3x2^4

### Math

For which real values of x do the following vectors form a linearly dependent set in R3? v1= (x, -1/9, -1/9) v2= (-1/9, x, -1/9) v3= (-1/9, -1/9, x)

### math

Write each of the following in the form a sqrt b where a and b are intergers and b has the least value possible

### math

write the following in simplified radical form sqrt 48 t^5 w^6 would it be 2sqrt24 t^5 /w^6?

### math

Convert each of the following repeating decimals to a/b form, where a, b are integers and b ≠ 0. #2a ¯ 0.4 #2c ¯ 1.396 #2e ¯ -2.34

### math

Convert each of the following repeating decimals to a/b form, where a, b are integers and b ≠ 0. #2a ¯ 0.4 #2c ¯ 1.396 #2e ¯ -2.34

### Math

Write the following logarithmic equation in exponential form? 1- log0.001 = -3

### algebra 209

write the following in simplified radical form 3 sqrt 250

### intermediate algebra

Simplify the following quotient of complex numbers into the form a+bi 1+8i ---- -6+i

### math

Convert eat of the following repeating decimal to a/b form, where a and b are integers and b doesn't equal 0. a. 0.7 c. 2.37 e. -4.34

### chemistry

arrange the following subshells in order form lowest to highest energy: 4s 4p 4d 4f

### algebra

what is the equation in standard form of a parabola that contain the following points? (-2,-20),(0,-4),(4,-20) Please Help

### maths

A circle x^2 + y^ + 2x - 2y -1 = 0 expressed in the following form (x-h)^2 + (y-k)^2 = r^2 where h, k are the coordinates of the centre. How is r the radius given?

### maths

A circle x^2 + y^ + 2x - 2y -1 = 0 expressed in the following form (x-h)^2 + (y-k)^2 = r^2 where h, k are the coordinates of the centre. How is r the radius given?

### math

Calculate the following, leaving your answer as a fraction (lowest) or in decimal form. 4(2+1)² -------- 3(1)²

### Math

A quartic graph has the following coordinates: (-4,0),(-2,0),(0,0),(1,0) find the equation in expanded form.

### Math

write the following equation in slope intercept form 3x+4y=12 I'm lost on this question

### Algebra 2 (Math)

What is the equation, in standard form, of a parabola that contains the following points? (-2, -20), (0, -4), (4, -20)

### algebra

Please show the following numbers in standard form. 6.548*10^-3 5.854*10^1 2.25*10^6 Thank you for your help.

### Math

1. What is the simplified form of the following expression? 12[6^2/(5^2-4^2)+7] A. 12.6 B. 195 C. 33.8 D. 132 2. What is the value of xy over z if x= -1, y =10 and z=2? A. 5 B. -5 C. 1/5 D. -1/5

### Math

rewrite the following in surd form : (16m squared) to the power of negative 3/4

### Algebra 1

Rewrite the following equation in slope-intercept form: -13y-6=18x Thank you.

### Algebra Readiness

1) Write the ration in simplest form 50:10 A)25:2 B)10:2 C)5:1 D)1:5 2) Solve the following proportion. r/5=9/21

### chemistry

(AAAAA)The standard reduction potentials of lithium metal and chlorine gas are as follows: (for Li, reduction potential is -3.04, for Cl it is 1.36) In a galvanic cell, the two half-reactions combine to 2Li{+](s) + Cl{-}2(g) --> 2Li{+}Cl{-}(aq) Calculate the cell potential ...

### math/Check!

a. An ellipse is formed by stretching the graph of x^2+ y^2=1 horizontally by a factor of 3 and vertically by a factor of 4. Determine the equation of the ellipse in standard form x^2/a^2+y^2/b^2=1 (x/3) ^2+ (y/4) ^2=1 x^2/9 + y^2/16 =1 so the equation is: x^2/9 + y^2/16 =1 b...

### Organic Chemistry

A methyl ether (SN2 product) can form as a byproduct in the sodium methoxide reaction. What is its structure? Provide the mechanism for the formation of the methyl ether product, in addition to answering the question.

### organic chemistry

A methyl ether (SN2 product) can form as a byproduct in the sodium methoxide reaction. What is its structure? Provide the mechanism for the formation of the methyl ether product, in addition to answering the question.

### Physics

Waves of all wavelengths travel at the same speed v on a given string. Traveling wave velocity and wavelength are related by v=lambda*f,where v is the wave speed, lambda is the wavelength (in meters), and f is the frequency [in hertz]. Since only certain wavelengths fit ...

### Gen Chem

What is n, the number of moles of electrons transferred, in the following reaction? 2 MnO4-(aq) + 16 H+(aq) + 10 Cl-(aq) ===> 2 Mn2+(aq) + 5 Cl2(g) + 8 H2O(l).

### Chemistry

Predict the product(s) and write a balanced equation for the following redox reaction: pentane (C5H12) + oxygen ---->

### chemistry

consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?

### CHEMISTRYYY

consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?

### chemistry

Na3PO4(aq) + AlCl3(aq) produces? Complete and balance each of the following equations. If no reaction occurs, write NOREACTION.

### Chem 11

How many grams of O2 are required to produce 255grams of SO2 in following reaction? 4FeS2+11O2===> 2Fe2O3+8SO2

### PHYSICS

What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.

### PHYSICS

What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.

### chemistry

How many moles of oxygen can be obtained by the decomposition of 7.5 mol of reactant in the following reaction? 2KClO3 -> 2KCl + 3O2

### Chemistry

Use the data in Table 15.3 to calculate the equilibrium constant for the following reaction: HCOOH(aq) + OH(aq) <-->HCOO(aq) + H2O(l)

### Chemistry

2C2H6 +7O2 --> 4CO2 + 6H2O If 6 moles of O2 are used in the following reaction, how many grams of CO2 will be produced?

### physics

Determine the stopping distances for a car with an initial speed of 93 km/h and human reaction time of 3.0 s for the following accelerations: -4.00 m/s^2 -8.00 m/s^2

### chemistry

what is the coefficients on Oxygen in the balanced equation for the following hydrocarbon combusion reaction C7H14 + O2 = CO2 + H2O

### Chemistry

At 319K the decomposition of dinitrogen tetroxide occurs with the following Kp: 2NO2(g)<>2NO(g)+O2(g) Kp=.700 What is the value of Kc for this reaction?

### Chemistry

When the equation for the following reaction in basic solution is balance, what is the sum of the coefficients? MnO2 + HO2^1-.....>MnO4^1- A=11 B=31 C=14 D=9

### Chemistry

Complete the following chemical reaction. Label any precipitate that forms. KCl(aq) + AgNO3 (aq) ¨KNO3 (aq)+AgCl(s)

### Chemistry

Calclte the number of moles of ethane needed to produce 10.0 grams of water according to the following reaction.

### Chemistry

Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H)

### Chemistry

Complete and Balance the following equation using the half-reaction method; (MnO4^-) + (CH3OH) --> (Mn^2+) + (HCO2H)

### Chemistry

In the following unbalanced reaction, which atom is oxidized? HNO3 + HBr -> NO + Br2 + H2O Is the answer bromine?

### chemistry

5. Identify whether the following reaction is an oxidation or a reduction. a. Ni2+ + 2e- ¨ Ni b. 2Br- ¨ Br2 + 2e- c. O2 + 4e- ¨ 2O2- d. Zn ¨ 2e- + Zn2+ e. H2 ¨ 2H+ + 2e-

### chem

How many grams of NH3 are required to make 52.7g H2O in the following reaction : 4NH3+6NO->5N2+6H2O

### Chemistry

For the following reaction, identify the substance oxidized, reduced and the oxidizing and reducing agents. 2SO2 + O2 ----> 2SO3

### chemistry

For the following reaction, identify the substances oxidized, reduced and the oxidizing and reducing agents? 2SO2 + O2 --> 2SO3

### chemistry

For the following reaction, identify the substances oxidized, reduced and the oxidizing and reducing agents? 2SO2 + O2 --> 2SO3

### chemistry

What volume of chlorine gas at 42.0 oC and 1.30 atm is required to react completely with 34.2 g of phosphorus (P4) according to the following reaction?

### Chemistry

Identify the Bronsted-Lowry acid in the following reaction. H2O (l) + HCO31- (aq) → H3O+ (aq) + CO32- (aq)

### Science

Given the following balanced equation, determine the rate of reaction with respect to [O2]. 2 SO2(g) + O2(g) → 2 SO3(g)

### Chemistry 1002

Calculate the standard entropy change for the following reaction at 25 °C. 2 Al (s) + 3 ZnO (s) --> Al2O3 (s) + Zn (s) answer is in J/K mol