# a certain reaction has the following generaln form

73,810 results, page 86

### chemistry

For the following fusion reaction, Calculate change in energy per mole.( Answer in J/mole) 2H1 + 2H1 ---> 3H1 + 1H1 (the mass number is in front of the atom and the atomic number is behind the atom) Given info:Atoms with their masses(amu) H-1 1.00782 H-2 2.01410 H-3 3.01605...

### Stastics

Which of the following descriptions of confidence intervals is correct? (Select all that apply) a. If a 95% confidence interval contains 0, then the 99% confidence interval contains 0 b. If a 99% confidence interval contains 0, then the 95% confidence interval contains 0 c. If...

### Chemistry

I am beyond desperate. I do not understand how to calculate heat change at all and I have been looking online and reading my book for the last three hours. Below is posted a problem. It would be amazing if someone could work through it and explain each step they are doing and ...

### Chemistry

Tarnish on iron is the compound FeO. A tarnished iron plate is placed in an aluminum pan of boiling water. When enough salt is added so that the solution conducts electricity, the tarnish disappears. Imagine that the two halves of this redox reaction were separated and ...

### Chemistry

1.) How many grams of 2-propanol are expected from the complete reaction of 672 g of propene? 2.)How many moles of propane are expected from the complete reaction of 82.8 g of propene? 3.)How many grams of propane are expected from the complete reaction of 101 g of propene? 4...

### 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 λ...

### 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 λ...

### Science-Repost-Universe&Stars

Give 2 reasons y elliptical galaxies are considered to be older & more evolved than spiral galaxies. They are considered to be older because they have little instellar matter and because they rarely form new stars like the other galaxies do. They seem to be more evolved than ...

### Science (Chemistry)

4. A Beer’s Law plot was prepared for the reaction A(aq) + B(aq) AB(aq), plotting absorption over AB(aq) concentration. The linear equation for this plot was y = 78.3x. A solution was prepared by mixing 10.0mL of 0.100M A with 5.00mL of 0.100M B and adding enough ...

### Law

Please choose the correct answer 21. All of the following statements are true, EXCEPT: a. Generally, courts will refuse to enforce contracts that involve illegal activities. b. Generally, courts will refuse to enforce contracts that are determined to be contrary to public ...

### chemistry

This is like the other one I posted about. I have to predict the product. Zinc (s) + sulfuric acid (aq) ----> ____ Please and thank you! This is a single replacement type reaction. Products are ZnSO4 and H2. Same type as Al and HCl. how do you know that H2 is alone instead ...

### Math

I have the following chart that I am supposed to find the percent increase in one step. The directions specifically say not to use a two step method. 10.5 12.5 14.9 17.7 21.1 25.1 So I divide 12.5 by 10.5, 14.9 by 12.5, etc. When I do this (and round) I get about 19% increase ...

### Math

I have the following chart that I am supposed to find the percent increase in one step. The directions specifically say not to use a two step method. 10.5 12.5 14.9 17.7 21.1 25.1 So I divide 12.5 by 10.5, 14.9 by 12.5, etc. When I do this (and round) I get about 19% increase ...

### chemistry

We did this in a lab and nothing happened, but I'm pretty sure something was supposed to happen, so my question is: What happens when you put a pellet of sodiumhydroxide on a watch glass and observe it for 5-10 minutes? If there were hudidity in the air, it should have ...

### Writing

Please grade this and make corrections. ACT writing prompt: The Children's Internet Protection ACT (CIPA) requires all school libraries receiving certain federal funds to install and use blocking software to prevent students from viewing material considered "harmful to minors...

### P-Chem

Protein denaturations are usually irreversible but may be reversible under a narrow range of conditions. At pH 2.0, at temperatures ranging from about 40 degrees celcius to 50 degrees celcius, there is an equilibrium between the active form P and the deactivated form D of the ...

### Chemistry

The data below has been taken for the reaction of a dye with the hydroxide ion. The reaction was performed at two different hydroxide ion concentrations while the dye concentration was kept constant. What is the rate law? [OH─] = 0.10 M [OH─] = 0.20 M t (min) Abs ...

### Chemistry

A student mixes 5.0 mL of 0.00200 M Fe(NO3)3 with 5.0 mL 0.00200 KSCN. She finds that the concentration of FeSCN2+ in the equilibrium mixture is 0.000125 M. Follow these steps to determine the corresponding experimental value of Kc for the reaction of Fe3+ and SCN– to ...

### Chemistry

Draw the structure of the product formed by the reaction between methyl alcohol and formic acid and give the molecular formula? I did not understand the answer that you gave me it did not make sense to me and I couldn't find it to respond back im sorry. If you wouldnt mind can...

### Science

The rate law for the reaction NO + O2 > NO2 is R=k[NO][O2]. what will be the effect on the reaction rate if the partial pressure of NO is doubled? What will the effect be if the partial pressure of O2 is tripled? My answer: More NO2 would be produced if NO was doubled. If ...

### Health

A swimmer would like to improve his time in the 100 yard freestyle race. After talking to his coach, he intends to focus on one critical element at the beginning of the race. This swimmer will try to improve his 100 yard freestyle time by improving his (1 point) Power of the ...

### chemistry

Okay, so apparently ASA and FeCl3 form a violet complex and FeCl3 forms with phenol groups to make purple. Looking at the structures of ASA and salicylic acid, only salicylic acid has the phenol group. The thing is, salicylic acid is supposed to be an impurity in the ...

### Algebra

1.Write an equation in point-slope form for the line through the given point with the given slope. (-10,-6);m=-5/8 A.y-6=-5/8(x-10) B.y-6=-5/8 (x+10)*** C.y+6=-5/8(x+10) D.y+10=-5/8(x+6) 2.The table shows the height of a plant as it grows. Which equation in point-slope form ...

### Economics

Among monopoly, oligopoly, Monopolistic competition, and perfect competition, how would you classify the markets for each of the following drinks? a. tap water b. bottled water c. cola d. beer I think it would be... a. Monopoly b. Oliopoly c. monopolistic competition d. ...

### math

Please can you help me with the following two questions? A. By making use of the correct order of operations, which of the following 3 equations are possible. 1) (35-13)x3= 2) 35-13x3 3)35-(3x13) B. Which of the following does not represent a whole number? 1) 7 x 7 divided by ...

### Chemistry 2

A mixture containing KCLO3, K2CO3, KHCO3, and KCL was heated, producing CO2, O2, and H2O (water) gases according following equations: 2KCLO3 -> 2KCL + O2 2KHCO3 -> K2O + H2O + 2CO2 2CO3 -> K2O + CO2 The KCL does not reacnder the conditions of the reaction. If 100.0g ...

### physics

A mass M is split into two parts, m and M - m, which are then separated by a certain distance. What ratio m/M maximizes the magnitude of the gravitational force between the parts?

### Physics

The question said find the speed of sound at a certain temperature. What formula would you use? Could someone tell me the formula so I could do the questions that correspond.

### re: geometry

The boat is outside of the semicircle. So how can his angle help him decide when he is entering the dangerous semicircle? is there a certain theory that this pertains to? I still don't understand. Please, help again? thanks

### math

A certain number changes from 200 to 900 within three hours find the vaulue of k using the formula n times e raised to k times t

### Physics

In a certain cyclotron a proton moves in a circle of radius 0.5m. The magnitude of the magnetic field is 1.2T. a) What is the oscillator frequency? b) What is the final kinetic energy of the proton?

### Calculus

At a certain point in time, a cubical crystal has edges 5 mm in length, and these edges are growing at a rate of 2 mm per hour. How fast is the volume increasing?

### Calculus

At a certain point in time, a cubical crystal has edges 5 mm in length, and these edges are growing at a rate of 2 mm per hour. How fast is the volume increasing?

### math

how to compute this problem? a certain element has a half life of 12 years. if there were 1000 milligrams originally, find the remaining amount after 20 years?

### physics

At a certain time, a 55-kg person is 25 m due north of you and is walking at a speed of 1.2 m/s exactly southwest. What are the magnitude and direction of this person’s angular momentum about you?

### Government

a. are always constitutional b. are always unconstitutional c. may be upheld by the supreme court if they meet certain criteria d. may be passed by congress but not by states. I'm stuck between b and c?

### college algebra

the population of a certain geographic region is approximately 105 million and grows continuously at a relative growth rate of 1.53%. what will the population be in 5 years?

### Physics

Two spheres are cut from a certain uniform rock.One has radius 4.50 cm.The mass of the other is five times greater. Find its radius.

### math

a certain antibiotic redues the number of bacteria in your body by 10% each dse, if 4 doses of the antibiotic are taken, what percent of the original bacterial population is left

### physics 2

An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -6.3 µC at this spot?

### physics

An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -6.3 µC at this spot?

### physics

A certain car is capable of accelerating at a uniform rate of 0.93 m/s2. What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 86 km/h to one of 98 km/h? Answer in units of m

### BIOLOGY

An animal has the genotype Cc for a particular trait. If, through meiosis, a certain female produces 100 eggs, how many of these eggs would have the C gene?

### physics

A certain car is capable of accelerating at a uniform rate of 0.84 m/s 2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 84 km/h to one of 97 km/h? Answer in units of m

### Physics

A test charge of +3.00 10-6 C experiences a downward electrostatic force of 11 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?

### physics

A test charge of +3.00 10-6 C experiences a downward electrostatic force of 15 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?

### Statistics

The amount of rainfall in January in a certain city is normally distributed with a mean of 4.2 inches and a standard deviation of 0.5 inches. Find the value of the quartile Q1

### math

To obtain a final average of 80 % in a certain subject, what grade must a student earn in a test after having an average of 77.5 % in four examinations ?

### math

3. The half-life of a certain drug in the human body is 8 hours how long it would take for a dose of this drug to decay to 0.1% of its initial level?

### chemistry

A certain volume of a gas at 298kelvin is heated such that its volume and pressure are now four times their original value.What is the new tewperature?

### physics

The acceleration due to gravity on a certain planet is about 6.5 \frac{m}{s^2}. What would a 78-kg scientific instrument weigh on Titan? W_{instrument} =______________ N (no rounding up)

### chamastry

The voluem of a certain mas of helium500ml at400k if he hav to change the volium of this gas to 40cm3 what change sheid br brought about in temparater

### Chemistry

A certain brine has 3.96% NaCl by mass. A 75.0−mL sample weighs 76.7g How many liters of this solution should be evaporated to dryness to obtain 730kg NaCl?

### biology

Certain insect species have become more and more resistant to insecticides. What type of natural selection is this, and how does it differ from the other types?

### Math

A quality control sample taken on a certain day revealed that for every 2000 units of a particular product manufactured,30 units were defective ?

### Physics

A certain car is capable of accelerating at a uniform rate of 0.83 m/s2 . What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 80 km/h to one of 92 km/h? Answer in units of m.

### health

what education is required for dentist? Do i put answer like math, science what certain certificate do you need for this job? Do i put Bachelor's Degree?

### chemistry

A certain volume of a gas at 298k is heated such that its volume and pressure are now four times their original value.what is the new temperature?

### chemistry

A certain volume of a gas at 298k is heated such that its volume and pressure are now four times their original value.what is the new temperature

### Calculus

Equation: Suppose that the demand of a certain item is x = -0.7 p + 20. Evaluate the elasticity at E = 8. I'm not sure what steps to take to solve this. I know that elasticity is equal to the absolute value of [(p/q) x (dp/dq)]

### math

show solution. in a certain eatery, there are 5 glass racks having 24 glasses and 8 left over. The answer says there are 130 glasses in all.

### algebra

The amount of rainfall in January in a certain city is normally distributed with a mean of 4.3 inches and a standard deviation of 0.3 inches. Find the value of the quartile Q1.

### phsyics

The x and y components of a certain force are measured and found to be Fx = (68 ± 3)N and Fy =(42 ± 2) N, respectively. Calculate the magnitude of this force? expressing your result to the proper number of significant figures.

### chemistry

a certain volume of a gas 298k is heated such that its volume and pressure are now four times their original values. what is the new temperature

### Biology

1% of sloths within a population show the recessive trait of a certain characteristic. This population is in HW Equilibrium. What is the value of p if p represents the dominant allele? a)0.99 b)0.9 c)0.81 d)0.18 I know the answer is B, but why? 0.09

### World history

Whih of the following was the most important factor in enabling the Spanish to defeat the Aztec Empire ? A. The Spanish were able to field larger armies than in the Aztecs. B. Spanish tolerance of Aztec religion and culture weakened Aztec resistance. C. The Spanidh were able ...

### Statistics and Probability

A box contains 4 red and 5 blue marbles. Michele picks three marbles at random from this box. If Z is a random variable representing the # of blue marbles picked from the box, do the following. a. Express the probability mass function of Z in tabular form. b. Draw the ...

### English

1. Say your thoughts about the following. 2. Say your ideas about the following. 3. Say something about the following pictures in your own words. 4. Speak your own ideas about the following. (Are they grammatical? Which ones are right?)

### Chemistry

1. Can I2 react with Cyclohexane to form any product (without or without spectroscophic properties)? 2. Can I2 react with t-butyl or n-butyl alcohol to form any organic product? 3. What is the complex formed between I2 and t-butyl alcohol? Is this complex more stable as ...

### Science

I said D for the following question but I got it wrong, I know it's not B though because the disease isn't sex-linked and not C because people who get the disease are usually older (50's). Would the Answer be A then? Even though it's deadly the huntington's disease allele can ...

### Chemistry

"Solid dinitrogen pentoxide is added to water." I got this as my answer: N2O5 + H20 -> 2HNO3. Do I need to break 2HNO3 apart since it's a strong acid? I thought it wouldn't since I thought it was a synthesis problem. I read online that this was the answer (N2O5 + H2O ->H...

### Math

These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of the following ...

### Chemical Reaction Engineering

The following elementary first-order reactions occur at constant density: k1 k2 A --> B --> C k1 = 5 hr-1 k2 = 4 hr-1 CA0 = 1 mol/lit CB0 = CC0 = 0 v0 = 20 m^2/min Find the maximum production rate of B in moles per minute and the optimum for (a) a plug flow reactor (b...

### spanish

are the verbs in () in the correct tenses? THANKS 4. La madre de Tomas se queja porque el no hizo lo que ella le pidio. Ya es demasiado tarde. Ayer te pedi que me (13) (traer) leche del supermercado y se te (14) (olvidar). Lo siento. Te suplico que me (15) (dar) otra ...

### Steve Math

1. Write the ratio in the simplest form. 45 : 15 a. 9 : 3 b. 3 : 1 c. 1 : 3 d. 4 : 1 4. Jake sold 39 tickets to the school fair, and Jeanne sold 12 tickets. What is the ratio, in simplest form, of the number of tickets Jeanne sold to the number of tickets Jake sold? 5. In 10 ...

### chemistry

The question below, i was wondering if it decrease because the N2 is on the right and so to add to left it would be too much so it gets rid of it by decreases and doing to the right? because the left side is (+) endothermic? sorry im a little confused. if the number was ...

### Chemistry

A chemist trying to synthesize a particular compound attempts two different synthesis reactions. The equilibrium constants for the two reactions are 23.3 and 2.2 X 10^4 at room temp. However, after 15minutes the chemist finds that the reaction with the smaller equilibrium ...

### More History Check

1.)Which of the following statements is true? =a)Although they differed in form, all State constitutions embodied the same basic ideals. b)Most of the early State constitutions gave great power to the executive branch. c)Some State constitutions were authoritarian, while ...

### Chemistry

I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent nitrogen. Its molecular weight is 102.2...

### Chemistry

I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent nitrogen. Its molecular weight is 102.2...

### English Check

In the discussion, answer the question: Which of the following characters served as the antagonist in "The Cold Equations"? •Barton •Marilyn •Commander Delhart •Records •Gerry Use evidence from the text in the form of examples and explanations to support your ...

### Geometry

Write the General form equations for the following circles: 1. A circle with center (1, -6) and radius 4 2. A circle with center (6, 8) and radius 10 3. A circle with center (0, 3) and radius 2√3 4. A circle with center (-0.5, 5.5 ) and radius 8.4 5. A circle with center (a...

### government

Think anyone can help me. I'm having trouple with my social civics pre-exam. Who is responsible for running a city under the council-manager program?(A) mayor and the city council. (B) hired administrator who runs the city's business affairs (C) an elected board What is the ...

### HEALTH

1. Which of the following statements about defensive medicine is true? A. Insurance companies encourage it. B. It's the result of fewer malpractice claims. C. It can mean excessive medical tests. D. It's motivated by the needs of the patient 2. The jury assigns percentages of ...

### Math - Trig / Pre - Calc

Standard form of hyperbola: Hyperbola: Vertices: (9,9), (9, -7) Foci: (9, 1 + 4 sqrt 13), (9, 1 - 4 sqrt 13)? Standard form Ellipse: vertices: (2 sqrt 10, -10), (-2 sqrt 10, -10) foci: (sqrt 30, -10), (-sqrt 30, -10)?

### More Chemistry (yeah im bad at math...)

In the Reaction CO+2H²-->CH³OH, 1.27 g of CH³OH are made in the lab. The Percent yield of this reaction is___. Would the answer be 42? Pick a number, any number. You need to know how much CO OR H2 you started with. As it stands, the answer is indefinite. so... it dosent ...

### chemistry

If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon load be in lbs (lbs of...

### chemistry

If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon load be in lbs (lbs of...

### chemistry

If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to Key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon load be in lbs (lbs of...

### Business Law Environment

The three main types of business organizations are partnerships, LLCs and corporations. Using the text and the comments to this chapter provide the following information. a. Describe the formation process for each – formal, informal, etc.? b. Describe the liability of the...

### math

find the exponential function of the form y=ab^x whose graph passes through the points (4,6) and (7,10) i got a=3.04 and b= 1.185 so my equation is y=3.04(1.185)^4 is this correct? one more problem. find a power function of the form y=ax^b whose graph passes through the points...

### chemistry

how do you find the Kc of a reaction?

### Chemistry

E(V) for half reaction 3N(-1/3) -> 3 N(0) + e-

### chemistry

if [NO]=2M , [N2] = 1M, and [O2]= 1M, is the reaction at equilibrium?

### Chemistry

Does Pb(NO3)2 + Cu has a reaction? if so, what will it be?

### CHMISTRY

HOW DO YOU CALCULAT KC FOR THE REACTION

### Chemistry Lab

Are you titrating? Qualitative testing? Just what? If the copper is in solution you can filter the ppt (or let the ppt settle and decant some of the supernatant liquid) and to the filtrate or the decanted liquid add some more NaOH to see if additional ppt will form. If I have ...

### Geography

I'm writing a paper about sedimentary rocks. My goal is 700 words but I'm stuck. can someone read this and let me know if I'm overlooking some important facts? ************************************* Sedimentary rocks are rocks that have accumulated at the surface of the Earth. ...

### math,correction

Can someone correct these for me please... Multiply. (x+2)(x-2) My answer..x^2-4 Write in descending-exponent form, and give the degree 4x^5+x^8-7 My answer: In descending-exponent form would be: x^8+4x^5-7, The degree is 8 Multiply. 3xy^2(5xy-4x+6y) My answer: 13x^2y^2+18xy^3...