a certain reaction has the following generaln form

73,377 results, page 33

chemistry

2. Consider the following solvent pairs. If mixed together, which pairs would form two layers? If they form two layers, which solvent would be on top? Find the densities for each of these solvents in the CRC Handbook. [6 mks] a. hexanes and water b. water and methylene ...

chemistry plz help!!!

are the following true for the element gallium? if they are false make them true. oxide more basic than Al203 oxide less basic than Mg(OH)2 hydroxide soluble in acid hydroxide soluble in base sulfide precipitates with H2S sulfide not soluble in (NH4)2S will form EaCl3, Ea2S3, ...

chemistry

are the following true for the element gallium? if they are false make them true. oxide more basic than Al203 oxide less basic than Mg(OH)2 hydroxide soluble in acid hydroxide soluble in base sulfide precipitates with H2S sulfide not soluble in (NH4)2S will form EaCl3, Ea2S3, ...

linear algebra

Which of the given subsets of R3 are subspaces? (a) The set of all vectors of the form [a;b;0] b)The set of all vectors of the form [a;b;c] where a > 0. c) The set of all vectors of the form [a;c;c] d) The set of all vectors of the form [a;b;c] where 2a − b + c = 5. ...

chemistry

Aluminum metal reacts with oxygen gas (O2) to form aluminum oxide. a. Write a balanced equation for this oxidation-reduction reaction. (In this problem you need not worry about the physical state of the reactants or product.) 2Al+3O2=2Al2O3 b. which reactant is oxidized? O2 c...

Chem Question (thermo)

Calculate ΔG at 25 ºC for a reaction in which Ca2+(aq) combines with CO32–(aq) to form a precipitate of CaCO3(s) if the concentrations of Ca2+(aq) and CO32–(aq) are 0.023 M and 0.13 M, respectively. (ΔGº = –47.94 kJ) A. –62.3 kJ/mol B. –33.5 kJ/mol C. –...

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 second). The process ...

American Literature

Which of the following genres is defined by theme (what happens) rather than form (how the words are put together)? A. Drama B. Comedy C. Satire D. Tragedy E. Sonnet

pre-calculus

Determine the center and the radius of the following circle: x^2+y^2+8x-2y=8 so I figured I'd use completing the square after putting it in standard form: (x^2+8x)+(y^2-2y)=8 I'm not sure where to go from here.

chemistry

simple ion does each of the following elements most commonly form? a. Sodium ……………. b. Iodine ..…………. c. Potassium .…………… d. Calcium .…………… e. Sulfur .…………… f. Magnesium .…………… g. Aluminum .….………. h. Nitrogen...

chemistry

What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) is this correct C G02 2

Chemistry

60.0 g of benzene is mixed with 135g of bromine to form bromobenzene according to the following reactionC6H6+Br2-C6H5Br+HBr which is the limiting reagent and what is the theoretical yield

Adverbs and other parts of speech

which one of the following words phrases if the superlative form of an adjective? A.Less B.Slower C.Most active D.more rapidly

organic chemistry

for each of the following compounds, draw the form in which it will predominate at ph=3, ph=6, ph=10, and ph=14. a)CH3COOH b)CH3CH2NH3 c) CF3CH2OH please explain how to get answers. my book does not give clear examples.

social studies

which of the following Nations has both the most stable democratic form of government and the highest standard of living? A.Israel B.Jordan C.Lebanon D.Syria

HELP!! ELA

Why am I always stuck on last questions!? Anyways: Write one sentence that uses the proper adjective form of each of the following words: Spain, America, and Shakespeare. How do you do this?

Spanish

Choose the correct form of ser or estar to complete the following sentence. Alejandro y Eva ______ mis padres. a. es b. estan*** c. son d. esta

chemistry

4. Phosphorous trichloride, PCl3, reacts with water to form phosphorous acid, H3PO4, and hydrocholoric acid: PCl3+ 3H2O> H3PO3+3HCL a. what is the limiting reactant when 10.0g of PCl3 is mixed with 12.4 g of H2O? b.what mass of HCl is formed? C. how much excess reactant ...

chemistry

0.197g of magnesium is burned in air 2Mg + O2 ---> 2MgO However, some of the magnesium reacts with nitrogen in the air to form Magnesium nitride instead : 3Mg + N2 --->Mg3N2 So you have a mixture of MgO and Mg3N2 weighing 0.315g.Determine what percentage of the Mg formed...

college chemistry

Carbon monoxide is toxic because it bonds much more strongly to the iron in hemoglobin (Hgb) than does O2. Consider the following reactions and approximate free energy changes: Hgb + O2 ---> HgbO2 ∆G⁰ = -70 kJ Hgb + CO ---> HgbCO ∆G⁰ = -80 kJ ...

Chemistry

can anybody think of a reaction that involves benzyl acetate? formula is CH3COOCH2C6H5 i already have most of the synthesis's but i really need a reaction that involves this ester as a reactant NOT a product. thanks :) Why don't you just cleave the ester and make the ...

chemistry

A total of 2.00mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 185g of solution. The reaction caused the temperature of the solution to rise from 21.0 to 24.7C . What is the enthalpy of this reaction? Assume that no heat is lost ...

Chemistry

When 4.0 mol of CCl4 reacts with an excess of HF, 3.0 mol of CCl2F2 (Freon) is obtained. The equation for the reaction is CCl4(l) + 2HF(g) --> CCl2F2(l) + 2HCl9g) State which of the statements are true about the reaction and make the false statements true. (a) The ...

French

Using the imparfait tense, I am trying to form "was born." Would it be "néait" (in the il/elle/on form)? It doesn't look right to me..

MaTH

Rearrange the terms of the equations fo form Ax + By = C I really get confused about general form, like how do I do it, I don't understand at all. x+3y = -1 2x+4y-12 = 0

MAATH

Rearrange the terms of the equations fo form Ax + By = C I really get confused about general form, like how do I do it, I don't understand at all. x+3y = -1 2x+4y-12 = 0

Algebra

Hi, I'm trying to learn logarithmic form and I'm kinda of stuck Write in exponential form: 1.log(3)6561=x 2.x^4 = 625 Thank you

algebra

Hi, I'm trying to learn logarithmic form and I'm kinda of stuck Write in exponential form: 1.log(3)6561=x 2.x^4 = 625 Thank you

optics

Transpose the prescription -0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve

Language Arts

The arrow and the song poem 1 i shot an arrow into the air, 2 it fell to earth, i know not where; 3 for, so swiftly it flew, the sight 4 could not follow in its flight Part A Which form best describes the poem this excerpt is from A. lyric poem B. concrete poem *** C. haiku D...

Chemistry

The energy used to power one of the Apollo lunar missions was supplied by the following overall reaction: 2N2H4 + (CH3)2N2H2 + 3N2O4 -> 6N2 + 2CO2 + 8H2O For the phase of the lunar module ascended from the surface of the moon, a total of 1200kg N2H4 was available to react ...

chemistry

The problem: Nitrogen can react with steam to form ammonia and nitrogen monoxide gas. A 20.0L sample of nitrogen at 173C and 772mmHg is made to react with an excess of steam. The products are collected at room temperature (25C) into an evacuated flask with a volume of 15.0 A. ...

Biochemistry

You wish to measure the change in G°'for the hydrolysis of ATP: ATP ---> ADP + Pi but the equilibrium for the hydrolysis lies so far toward products that analysis of the ATP concentration at equilibrium is neither practical nor accurate. However, you have the following ...

Chemistry

1)The following balanced chemical equation represents the reaction of calcium carbonate CaCO3 (s), with hydrochloric acid : CaCo3(s) + 2HCl (aq) -> CaCl2(aq) + CO2(g) + H2O(l) If 155 g of calcium carbonate reacts with 245 g of hydrochloric acid, what mass of calcium ...

math

what is the standard form and the expanded form 0f 20 and 7 thousands

Trigonometry

What is -6i in standard form? It is originally in trig form.

putting it all together

which one of the following statements is true concerning children and television? a.minimal viewing results in shifts in attitudes b.t.v.is an unrivaled teacher for certain subjects c.t.v. has resulted in minor changes in the habits of children d.t.v. has a non hypnotic power ...

Math

This is the second part of a two part question for an online class. It gave me the degree and the zeros and I had to give the factored form. I got that part right, but I need to know how to get the expanded form from the factored form. I have several more questions like this ...

Math

Three linear equations are given below. The first is in slope intercept form, the 2nd is in point-slope form and the 3rd is in standard form. Each equation has a slope. What is the sum of the three slopes. 1.y = -2x + 5 2.y + 7 = 6(x − 3) 3.4x − y = 9 1 is -2 2 is ...

English

Question 9 How is an amount indicated for a noncount noun? add an -es to the noun include a noncount noun first add an -s to the noun include a count noun first Question 10 Count nouns are usually what type of words? wrong specific limitless abstract Question 11 Noncount nouns...

chemistry

enthalpy change^H is +23kJ mol-1 of phosphine (PH3) for the reaction 2P(s)red+3H2(g)---->2PH3(g) a) Calc. entropy change for this reaction. Explain how this information allows you to determine the spontaneity or non-spontaneity of this reaction at any temp (S for PH3 is ...

chemistry

If H2SO4 were added to the following, would it form a salt, if so what is the name of the salt? NaCl Ca(OH)2 Hf AlCl3 H2O Mg(OH)2

Grammar

What is the possessive form of democracy in the following sentence. Would democracy followers win the struggle. Is it democracies'

Calculus

For the following integral find an appropriate TRIGONOMETRIC SUBSTITUTION of the form x=f(t) to simplify the integral. INT (x^2)/(sqrt(7x^2+4))dx dx x=?

Math

Convert each of the following repeating decimals to form, where a, b are integers and b „j 0 a) 0.4 with line on the four b) 1.396 with line on the six

math

write each of the following in decimal form: (a) 5x100+2x10+7+4x0.1+8x0.001 ________________________________ (b)... ________________________________

Math

Express the following in roster form: Set M is the set of natural numbers between fourteen and nineteen.

Intermediate Algebra

Simplify the following exponents and rewrite it in an equivalent form with positive exponents..24x^3y^-3/72x^-5y^-1

College Algebra

Find all zeros of the following polynomial. Write th polynomial in factored form. f(x) = x^4 - 256

maths

write the following expression ,if possible, as apolynomial in the form a, (xcube - xfourth + 2x +1)-(xfourth + x cube - 2xraised2 +8

Chemistry

In the formation of acid rain, sulfur dioxide reacts with oxygen and water in the air to form sulfuric acid. Write the balanced chemical equation for the reaction. 2 SO2 + 1 O2 + 2 H2O --> 2 H2SO4 If 5.45 g SO2 react with excess oxygen and water, how many grams of H2SO4 are...

Math - algebraish

hey how do we convert y=mx+b to standard form? the standard form of the equation of a straight line is usually considered to take this form Ax + By = C, where A,B, and C are integers and A is positive. So if your equation is in the slope-yintercept form step 1: eliminate any ...

chemistry

Examine the scenario. A magnesium (Mg) atom gives one electron to two atoms of another element, and takes on a 2+ charge. The two atoms of the other element each form a 1− charge. As a result, the magnesium ion and the two ions of the other element attract and form an ionic ...

Chem1020

Sulfuric acid can dissolve aluminum metal according to the following reaction. 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 23.7 g . Sulfuric acid can dissolve aluminum metal according to the following reaction. 2Al(s...

Chemistry

Help required- Urea, CO(NH2)2, is the excreted form of excess nitrogen in most vertebrates. In urinary infections, urease, released by microbial pathogens, degrades urea into CO2 and ammonia in the bladder. a) write a balanced equation of the reaction, b) write equations for ...

Biology

1. Which of the following is not a characteristic of life? A. maintains homeostasis *** B. composed of cells C. composed of atoms D. carries out metabolism 2. Which of the following must be true to consider something to be alive? A. It must be able to replicate its DNA. B. It ...

Science

Experiments cannot validate hypotheses, only falsify them. The statement above can be restated in which of the following ways? A. Until disproved, an explanation for an observation is valid. B. Certain concepts cannot be subjected to direct experimentation. C. A hypothesis ...

ap chemistry

Some reactions that are predicted by their sign deltaG to be spontaneous at room temperature do not proceed at a measurable rate at room temperature. A suitable catalyst increases the rate of such a reaction. What effect does the catalyst have on deltaG for the reaction? AND ...

chemistry

The synthesis of urea by Frederich Wöhler in 1825 began the decline of the idea that "organic" chemicals could only be made by living organisms as part of their biological processes. AgOCN(aq) + NH4Cl(aq) → AgCl(s) + NH2CONH2(aq) If you perform this reaction and collect...

Chemistry II

If 36.0 mL of 7.0e-4 M HClO4 is added to 19.5 mL of 8.2e-4 M LiOH, what is the pH of the solution? Write the equation. Calculate mols HCLO4. Calculate mols LiOH. Determine how much of which reagent remains after the reaction. pH = -log(H^+) post your work if you get stuck. ...

Chemistry

Antacid neutralizes stomach acid by the following reaction: Mg(OH)2 + 2HCl -----> MgCl2 + 2H2O Calculate the amount of Mg(OH)2 (in grams) needed to neutralize 2.5 grams of HCl.

science-chemistry

how do the following changes affect the speed of a reaction? a)Increasing the concentration of the reactans. b)Decreasing the temperature. c)Decreasing the partickle size of a solid reactant.

Chemistry

Calculate the cell emf (in volts) for the following reaction at 25°C: Ni(s) + 2 Cu2+(0.010 M) → Ni2+(0.0010 M) + 2 Cu+(1.0 M) [Enter only the number of your answer.] Answer

Chemistry

What mass of 3.0 wt% H2O2 solution is required to provide a 25% excess of reagent for the following reaction with 12 dietary iron tablets that contain ~15 mg of iron per tablet?

Chemistry

Consider the following reaction: PCl3 + 3H2O -----> P(OH) + 3HCl if 4.00L of PCl3 react with an excess of H2O at STP, how many grams of HCl would be formed?

Chemistry

Use the data in Table 15.3 (in the book Chemistry after Raymond Chang) to calculate the equilibrium constant for the following reaction: HCOOH(aq) + OH-(aq)= HCOO-(aq) + H2O(l)

chemistry

The combustion of propane is given by the following reaction: C3H8 (g) + 5 O2 (g) ---> 3 CO2 (g) + 4 H2O (g) If 5.00 L of propane are burned in in the presence of excess O2, how many liters of carbon dioxide will be formed?

chemistry

How do I balance the following equation by the half-reaction method (it takes place in basic solution)? Fe(OH)2(s) + O2(g) = Fe(OH)3(s) the answer is 4Fe(OH)2(s) + 2H20(l) + O2(g) = 4Fe(OH)3(s) but how do I work it out?

chemistry

In the following reaction, how many grams of ferrous sulfide (FeS) will produce 0.56 grams of iron (III) oxide (Fe2O3)? 4FeS + 7O2 d 2Fe2O3 + 4SO2

Chemistry

For the following chemical reaction, what mass of silver nitrate in grams will be needed to produce 3.91 mol of calcium nitrate? CaI2+2AgNO3=2AgI+Ca(NO3)2

Heat

Consider the following equation: CO + 2 H2 → CH3OH ΔH rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2. How would u set that up?

chem

The reaction A + B „³ C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?

chemistry

The reaction A + B --> C + D is second order in A and zero order in B. The value of k is 0.012 M-1 min-1. What is the rate of this reaction when [A] = 0.125 M and [B] = 0.435 M?

chemistry

What is the enthalpy for reaction 1 reversed? reaction 1 reversed: 2CO2+3H2O=C2H5OH+3O2 express the answer in kJ/mol

science

If a temperature increase from 19.0 degrees C to 36.0 degrees C triples the rate constant for a reaction, what is the value of the activation barrier for the reaction?

AP Chemistry

redox reaction: Hydrogen peroxide is added to an acidified solution of potassium permanganate. what is the total redox reaction?

science

For the reaction mc011-1.jpg at 472°C equilibrium is established when [H2] =0.0200M, [N2] = 0.0100M and [NH3] = 5.37 x 10-8M. What is the equilibrium constant for this reaction

Chemistry

A reaction A(aq)+B(aq)<-->C(aq) has a standard free-energy change of –3.35 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively?

Chemistry

A reaction has a standard free-energy change of –4.60 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively?

Chemistry

If a temperature increase from 11.0∘C to 22.0∘C doubles the rate constant for a reaction, what is the value of the activation barrier for the reaction?

Chemistry

Define the-half of a reaction. Explain on the molecular level why the half- life of a first-order reaction is constant

Chemistry

Define the-half of a reaction. Explain on the molecular level why the half- life of a first-order reaction is constant

chemistry

The value of Change in heat for the reaction below is -790 KJ. Calculate the enthalpy change accompanying the reaction of .95 g of S. 2S(s) + 3 O2 --> 2 SO3(g)

science

AgNO3+NaCL=AgCL+NaNO3 is not a redox reaction but Cu+2AgNO3=2Ag+Cu(NO3)2 is a redox reaction.explain

Chemistry

What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the reaction below? N2+H2→NH3 (not balanced) A) 0.60 g B) 5.7 g C) 1.2 g D) 2.9 g

chemistery

explain the progress of the reaction in terms of kinetic energy explain how various factor affect the rate of reaction

science

explain the progress of the reaction in terms of kinetic energy. explain how various factor affect the rate of reaction. any help thanks

Chemistry

How do I do these? 1. Balance the equation for the reaction between zinc and hydrochloric acid. Zn + HCl ZnCl2 + H2 2. Balance the equation for the reaction between iron (steel wool) and oxygen (water). Fe + O2 Fe2O3 3. Balance the equation for the reaction of hydrogen ...

Physics

Engineering 100 Homework Problem #1 Below is a diagram of a beam supported on the left end by a pin connection, and toward the right side by a simple fulcrum. A force F is applied to the far right end of the beam as shown. The uniform beam has mass, m, length, l, and the ...

Math: Trig

Help with vectors, please. Thanks 1) Express point in rectangular form. Give EXACT answer, if possible? (2, 4π /11) 2) Given P = (2. -3) and Q = (-3, -4). find the component form of vector PQ 3) The vector v has a magnitude of 25 inches and a direction of 32° , Express ...

Equilibrium concentrations, please help!!!

Lead metal is added to 0.150 M Cr3+(aq). Pb(s)+2Cr3+(aq)⇌Pb2+(aq)+2Cr2+(aq). KC=3.2×10−10 What is [Pb2+] when equilibrium is established in the reaction? What is [Cr2+] when equilibrium is established in the reaction? What is [Cr3+] when equilibrium is established in the ...

Spanish: Please check answers

Please check my answers. The nswers are at the bottom. 3. Fill in the blank with the correct form of the verb: yo/dormir. yo _________ 4. Fill in the blank with the correct form of the verb: ella/devolver. ella _________ 5. Fill in the blank with the correct form of the verb: ...

teacing in early childhood programs

authoritative teachers tend to do all of the following except a.explain why some behaviors are appropriate and acceptable and others aren't b.encourage and reword certain behaviors. c. focus most of their comments to children on what they've done wrong. d. inform children of ...

History

Which of the following is NOT associated with El Nino? Fish that thrive in cold Pacific waters are driven away**** Areas that usually have dry weather get heavy rains or are flooded Drought plagues certain peoples in South America All of the above are associated with El Nino

chemistry

"However, the Ag^+ + I^- reacted to give AgI (but that is not a redox reaction) and if they reacted why didn't Br^- and Ag^+?" Hi Dr.Bob, I am also given additional information for reaction #1 Cu(s) I-(aq) Ag(s) Br- (aq)

Chemistry

making 2 moles of No in a reaction requires 180KJ of energy. How much No will be made if this same reaction absorbel 950KJ OF ENERGY

chem

When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the reaction is 83. In which direction will the reaction shift to regain equilibrium?

Chemistry

A reaction has a standard free-energy change of –12.40 kJ mol–1 (–2.964 kcal mol–1). Calculate the equilibrium constant for the reaction at 25 °C.

chemistry

For a particular redox reaction NO is oxidized to NO3^– and Cu^2+ is reduced to Cu. Complete and balance the equation for this reaction in basic solution: NO + Cu^2+ --> NO3^- + Cu^+ help. thanks.

Chemistry

A reaction has a standard free-energy change of –12.40 kJ mol–1 (–2.964 kcal mol–1). Calculate the equilibrium constant for the reaction at 25 °C.

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