a certain reaction has the following generaln form

73,436 results, page 100

Chemie

for the reaction at 20 C NH3 (aq) + H+ (aq) <----> NH4+(aq) the equilibrium constant is calculated to be K=4.5 x 108

Chemistry

Calculate the equilibrium constant, k a reaction with delta G= -32.5 kj/mol at 25 degrees C

Chemistry

need help to balance half reaction in basic solution IO3 to I2

chemistry

What mass of magnesium chloride is formed in the reaction between 7 g of Mg and 7.9 g of Cl2

AP Chemistry

write an oxidation- reduction reaction for the reactants OCl- and S2O3-2

chemistry

How do you draw the structure of the reaction of 1-hexene with h2o in the presence of acid

Chem.

What is the overall stoichiometry for the reaction between iodide and peroxydisulfate ions?

chemistry

write a reaction that show solid copper (II) nitrate dissociating.

chemistry

In the reaction ZnO+2HCl=ZnCl2+H2O what is oxidized and what is reduced?

Chem

Write the balanced overall reaction from these unbalanced half-reactions ln--->ln^3+ Cd^2+--->Cd

chemistry

What are the products of the reaction between nitrous acid and strontium hydroxide?

Chemistry

Balance Redox using reactions by the 1/2 reaction method. NaIO3 (aq) + KI (aq) -->„³ I2 (s)

chemistry

Redox reaction in assign oxidation number is ca3(po4)2

Chemisty

blanced equation for MgSO4(aq) + BaCl2(aq) describing any precipitaion reaction

chemistry

in a reversable reaction H2+I2=2HI,what will happen to the equilibrium if the volume is decrease?

chemistry

How many grams of HCl are formed from reaction of 3.58g of H2 with 8.90g of Cl2?

chemistry

Consider the reaction, 4 NH3 + 5 O2 => 4 NO + 6 H2O How many grams of NO will be made from 10.7 moles of O2?

chemistry

When an acid and a base react in a neutralization reaction, the products will be acidic. T/F

chemistry

By what factor is the rate of a reaction changed if an enzyme lowers the Ea by 9.0 kJ/mol at 37°C?

chemistry

write a chemical reaction for lead2 nitrate + sodium iodide ->

sds chemisry

diffren between endotermic reactin and exotermic reaction

chemistry

How much heat (in kilocalories) is released when 7.87g of Al is used in the reaction?

Chemistry help

Why is it important for the reaction beaker to be completely dry before weighing?

Chemistry

The chemical equation for ionic reaction between Na2S and AgNO3??

chemistry

what is the rate law for NO+O3=NO2+O2 in second order reaction if [NO] Doubled

chemistry

How much heat is produced by the complete reaction of 5.91kg of nitromethane?

Chemistry

How can I tell from a graph of temperature vs. time if a reaction is endothermic or exothermic?

Chemistry

How is 4FeS2 + 11O2 = 2Fe2O3 +8SO2 a single replacement reaction?

chemistry

Net Ionic Reaction and molecular Equations of Ca3(PO4)2

science

how to balance chemical equations with redox reaction Cr(OH)3 + IO3{-} + OH{-} = CrO4{-2} + I{-}

chemistry

Calculate the number of moles of O2 that can be produced by the decomposition reaction of water

Physics

What is the reaction of the earth pulling down on a pen that is lying on a table

Science

2Na(s) + 2H2O(aq) = 2NaOH (aq) + H2 (g) Is this reaction exothermic or endothermic? I don't understand ,

Science

Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic? Help please

chemistry (ap)

What will be the reaction rate (formation of C) when the concentrations of A & B are 0.150 M and 0.250 M respectively?

chemistry

4.8g of Mg were burn in 3.2g of oxygen. The MgO produced at a mass of 8g what is the equation of the reaction

CHEMISTRY

What will be the reaction rate (formation of C) when the concentrations of A & B are 0.150 M and 0.250 M respectively?

SCIENCE

CO+H2O ---->CO2+H2 IN THIS REACTION HOW TO I HAVE TO CANAVART CARBONIC ACID?

chemistry

What is the balanced equation for reaction between hydrochloric acid and water?

chemistry

What os the balanced equation for the reaction between ethanoic acid and water?

Physical science

Explain why an endothermic reaction might cause a drop in temperature.

Chemistry

is H2CO3+2LiOH=Li2CO3+2H2O a oxidation reduction reaction??

Science

Reaction between potassium dichromate and sulphir dioxide gas?

Science

Reaction between potassium dichromate and sulphur dioxide gas??

English

low sleep or sleepiness what is the effect on our reaction time?

chemistry

When you mix baking soda with vinegar is the reaction endothermic or exothermic?

Chemistry

What is the formula of the precipitate formed from the precipitation reaction of Li2CO3 and ZnCl2?

Chemistry

Can you check my calculations, please? It's for a lab we did in order to find the the enthalpy of formation of NH4Cl(s). My final answer was -299.4 kJ, while the theoretical, or actual, value is -314.4 kJ. It was the closest value out of everyone in the entire class. I'm not ...

physics

How do i go about this question? Suppose a car is traveling at 20.0m/s, and the driver sees a traffic light turn red, After 0.530s has elapsed (the reaction time), the driver applies the brakes, and the car accelerates at 7.00m/s2. What is the stopping distance of the car, as ...

Chemistry Lab

I need help with the third part The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please enter the ...

intro to lan technologies

• Explain how you would create the users for the sales organization unit and how you can set up work groups in this particular situation. Keep in mind that you may have to name certain applications and allowable tasks for each individual or job role.

psychology

the legal requirement that professionals notify appropriate authorities about cases in which children and certain other groups of vulnerable individuals are being abused is referred to as a) parens patriae. b)informed consent. c)duty to warm. d)mandated reporting.

Math 120

The results of a certain medical test are normally distributed with a mean of 128 and a standard deviation of 19. ​(A score above 140 is considered​ unhealthy.) Use the given table to find the percentage of people with readings below 137.

geography

1. Which of the following problems is not a result of Egypt's growing population? A overcrowded cities B emigration of educated professionals to other countries C a diminishing food supply D widespread unemployment Is it D? 2. What is a major reason for the failure of West ...

Computer Science (MATLAB)

I had a test in my computer science course in which I was asked if any while loop can be replaced with a for loop. I put true. I guess the answer was false. My professor said that if you had a while loop in which you asked the user to input a certain value that had to be ...

Computer Science (MATLAB)

I had a test in my computer science course in which I was asked if any while loop can be replaced with a for loop. I put true. I guess the answer was false. My professor said that if you had a while loop in which you asked the user to input a certain value that had to be ...

Chemistry

Thanks for the help earlier My question Silicon tetrachloride (SiCl4) can be prepared by heating Si in chlorine gas: Si + 2Cl2 yields SiCl4 In one reaction 0.507 mole of SiCl4 is produced. How many moles of molecular chlorine were used in the reaction? Ok is it makeing ...

Science

When conditions are favorable, certain microorganisms may grow and reproduce in a matter of minutes. True or False? please reply ASAP. True. I believe it depends on the temperature of the surrounding microorganisms.

Math

The demand and supply equations for a certain item are given by D = -5p + 40 s = -p^2+30p-8 Find the equilibrium price. Wouldn't you set demand equal to supply, and solve for P? I will be happy to critique your work.

calculus

find all extrema in the interval [0, 2pi] if y=sinx + cosx and also a certain item sells for $30. if the cost of producing this item is given by C=.05^3 + 100, find the mariginal profit when x=10.

Chemistry

Consider a certain type of nucleus that has a half life of 32 min. Calculate the percent of original sample of nucleus remaining after 3.0 hours have passed? how would i calculate this???

Chemistry

There was this problem on a test that I took recently. But, I never learned how to solve this. The problem was: it gave the mass of a certain compound and stated that it had 92% carbon. then it asked for the theortical yield of Carbon.

Math

There are 1760 yards in a mile. A certain wheel makes 17600 revolutions in 40 miles. What is the number of yards in the radius of the wheel?Give the answer as a decimal to the nearest tenth of a yard.

Physics

For a certain transverse wave, the distance between two successive crests is 3.11 m, and 5 crests pass a given point along the direction of travel every 12.16 s. Calculate the wave speed.

Physics

For a certain transverse wave, the distance between two successive crests is 1.89 m, and 5 crests pass a given point along the direction of travel every 12.84 s. Calculate the wave speed.

statistics

Write the null and alternative hypotheses. Justify which is the claim. A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is less than 900 hours

physical science

a hammer falls off a rooftop and strikes the ground with a certain kinetic energy. if it fell from a roof twice as tall, how would its kinetic energy compare? explain

Chemistry 2

A saturated solution of a certain metal(II) chloride has a chloride ion concentration of 0.032M. The Ksp for this compound can be determined to be a) 2.6 X 10-7 b) 4.1 X 10-6 c) 1.6 X 10-5 d) 2.6 X 10-4 e) 1.6 X 10-2 I am unsure how to approach this problem or the steps to ...

calculus

The population of a certain community is increasing at a rate directly proportional to the population at any time t. In the last yr, the population has doubled. How long will it take for the population to triple? Round the answer to the nearest hundredth, if necessary.

chemistry

A 1.70 g sample of a certain metal reacts with acid to liberate 380 mL of hydrogen gas, when collected over water at 20 Celsius and over 720 torr. What is the equivalent mass of the metal?

physics

For a certain transverse wave, the distance between two successive maxima is 1.26 m and eight maxima pass a given point along the direction of travel every 12 s. Calculate the wave speed.

Physics

HELP!!! Consider an airplane with a total wing surface of 140 . At a certain speed the difference in air pressure below and above the wings is 3.0 of atmospheric pressure.Find the lift of the airplane

Geometry

In a certain game, a player throws a standard 6-sided number cube twice per turn. What is the probability that the result of the first throw will be a 1, and the result of the second throw will be greater than 3?

Math

The probability of a certain hockey player making a goal after hitting a slap shot is 1/5. How many successful slap shots would you expect her to make after 120 attempts? A.5 B.20 C.24 D.60

Physics

A certain rain cloud at an altitude of 1.90 km contains 3.20 107 kg of water vapor. How long would it take for a 2.18-kW pump to raise the amount of water from Earth's surface to the cloud's position?

Physics

An electric rod of 2000 watts rating boils a certain quantity if water in 10 minutes, the heat is generated for boiling this water is? answer is 12 X 10^5 Joules, but I cant solve it please solve it

Physics

A certain circuit consists of an inductor of 50 mH in series with a resistor of 130 Ω. At one moment, the current in the circuit is 12 A, and decreasing. How long will it take for the current to fall to 4.8 A? Answer in units of s.

Math

A certain amount of money is equally divided between some persons .If there were 8 persons more each would have got one rupee less. The number of the person and the amount are?

maths

coffee costing $250 per kg was mixed with chicory costing $75per kg in th ration 5:2 for a certain blend. if the mixture was sold at $230 per kg,find the gain or loss percent.

Accounting

Dividing Partnership Income Desmond Drury and Ty Wilkins have decided to form a partnership. They have agreed that Drury is to invest $140,700 and that Wilkins is to invest $60,300. Drury is to devote full time to the business, and Wilkins is to devote one-half time. The ...

Math

Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the concentration of calcium in precipitation in a certain area was 0.11 milligrams per liter (mg/L). A random sample of 10 precipitation dates in 2007 results in ...

Please answer two math questions!!!

10. From the 2010 census data, the population of Texas was about 2.5 x 107 people. Florida’s population was about 1.9 x 107. Idaho’s population was about 1.6 x 106. Which of the following statements is true? a)Idaho has a larger population than Florida. b)Florida has a ...

Chemistry

For each of the following, enter the number of covalent bonds that the atom can form: (A) One atom of carbon (B) One atom of sulfur (C) One atom of nitrogen with no net charge (D) One atom of nitrogen with positive net charge (E) One atom of oxygen with no net charge (F) One ...

English

1. Is it OK to tell a lie to make a person happy? --------------------------- In this sentence, what is 'a person'? 1. one person 2. a certain person 3. any person

English

1. Colors make up our world. 2. Our world is made up of colors. 3. Our world is made up by colors. (Is #2 the passive form of #2? What about #3? Is #3 the passive form of #1?)

correction

One of people’s favorite hobbies is to listen to music. is there another word to say for people. it sounds too informal for an essay. Many people have a hobby of listening to music. The favorite hobby of many people is to listen to music. Listening to music is the favorite ...

chemistry

Write the balanced net ionic equation for the following reaction and determine the conjugate acid-base pairs. HNO3(aq)+Li2CO3(aq)<--->LiNo3(aq)+LiHCO3(aq) Which component in the net ionic equation is the acid, the base, the conjugate base, and the conjugate acid Thank ...

chem

part 1 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 figures. Do ...

(NOT for Ms. Sue)

1) Why was the Department of Defense created? A) to place the U.S. Army and Navy in one executive department B) to establish a military chain of command C) to end disagreements between the U.S. Army and Navy D) to lessen the instance of military abuse of power** 2) Which of ...

history

Which of the following best explains why trade among the colonies flourished? A)The different regions specialized in different crops. B)The colonies had developed large fleets of trading ships.** C)Existing trade routes were well-maintained by Native Americans. D)Colonies were...

Algebra III / Core II

It has been since the beginning of last year since I last did this math and the teacher I currently have is a sub and doesn't know what the heck she's doing either - so if anyone can help me, that'd be oh so amazing! a. Solve d=rt in terms of d and t. b. solve p=4q + 12r for q...

Chemistry II

C4H4 (g) + 2 H2 (g) --> C4H8 (g) Combustion reactions involve reacting a substance with oxygen. When compounds containing carbon and hydrogen are combusted, carbon dioxide and water are the products. Using the enthalpies of combustion for C4H4 (-2341 kJ/mol), C4H8 (-2755 kJ...

Chem HW!! Difficult! HELP!

Urea (H2NCONH2) is used extensively as a nitrogen source in fertilizers. It is produced commercially from the reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g) ---Heat pressure---> H2NCONH2(s) + H2O(g) Ammonia gas at 223°C and 90. atm flows into a reactor at a rate...

Chemistry

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g); (Delta)H°= –87.9 kJ How much heat is liberated at constant pressure if 0.215 g of iron reacts with 40.4 mL of 0.579 M HCl? How much ...

Chemistry - Le Chatelier's Principle

Hi, I have a question regarding the following chemical equilibrium equation: 2CrO4^2- + 2H3O^+ <--> Cr2O7^2- + 3H2O The question is: how would you manipulate the above equation to produce more Cr2O7^2- ions without adding any Chromium based compounds? I understand the ...

Chemistry

A student places 0.025 moles of solid sulfur and 0.100 moles of nitrogen monoxide gas in a closed 1.00L container and 0°c for several days. Calculate the number of molecules of NO in the 1.00L container after equilibrium is reached, given the following thermodynamic data. I ...

Biology again

could someone explain the importance of replication for maintaining genetic stability? i am guessing that the DNA during replication needs be be copied exactly like before so as to pass on certain genes..but i'm a bit confused and don't know what else to say...

BiOO agAIN

could someone explain the importance of replication for maintaining genetic stability? i am guessing that the DNA during replication needs be be copied exactly like before so as to pass on certain genes..but i'm a bit confused and don't know what else to say...

Math

minimum daily values (MDVs) for certain foods are given. They are based on a 2,000 calorie per day diet. Find decimal and fractional notation for the percent notation in each sentence. (a) 1 ounce of Tostitos provides (

Physics (Online w/ no teacher)

The mass of a certain neutron star is 3.0 X 10 to the 30th (1.5 solar masses) and its radius is 8,000 m (8 km). What is the acceleration of gravity at the surface of this condensed, burned-out star? My answer was 31,265,625 X 10 to the 12th km/s squared.

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