112 Answered Questions for the topic Chemical reactions

Chemical Reactions Chemistry

05/21/19

What is the number of molecules

What is number of molecules of2CH4?
Follows • 1
Expert Answers •1
Chemical Reactions Chemistry

03/07/19

Find Chlorine gas formed and which reactant remains in excess. (Use dimensional analysis)

Chlorine can be generated by heating together calcium hypochlorite and hydrochloric acid.Calcium chloride and water are also formed.A. If 50.0 g Ca(OCl)2 and 275mL of 6.00 M HCl are allowed to... more
Follows • 1
Expert Answers •1
Chemical Reactions Chemistry

03/03/19

What mass of H2(g) is produced?
An excess of aluminum foil is allowed to react with 225 mL of an aqueous solution of HCl (d=1.088 g/mL) that contains 18.0 % HCl by mass. What mass of H2(g) is produced?
Follows • 1
Expert Answers •1

10/05/18

chemistry question
A flask contains a mixture of nitrous oxide (N2O) and oxygen (O2) with partial pressures of 425 torr and 786 torr respectively.What is the ratio of the number of moles of N2O to the number of moles... more
Follows • 2
Expert Answers •1
Chemical Reactions

09/25/18

If 0.525 g of Fe2O3.xH2O are heated and 0.389 g of Fe2O3 are obtained
If 0.525 g of Fe2O3.xH2O are heated and 0.389 g of Fe2O3 are obtained, what is the value of x?Your answer should have three significant figures. In this case x does not have to be a whole number.
Follows • 2
Expert Answers •1
Chemical Reactions Chemistry Chemical Formula

09/25/18

Chemical Reaction with density?
I was given the equation: NaN3 --> Na2 + N2, which I balanced to:2NaN3 --> 2Na2 + 3N2 (I hope that is correct) a) Determine the number of grams of N2 are produced by the decomposition of... more
Follows • 2
Expert Answers •1
Chemical Reactions Chemistry Chemistry Science

09/25/18

AP Chemistry Reaction HW Problem
I was given the equation: Ca(OH)2 + H3PO4 --> H2O + Ca3(PO)4, which I balanced to:3 Ca(OH)2 + 2 H3PO4 --> 6 H2O + Ca3(PO)4I am supposed to finda) How many grams of calcium phosphate are... more
Follows • 2
Expert Answers •1
Chemical Reactions Science Chemistry Ap Chem

09/03/18

Why are silver, lead, and mercury so special? (why do they always precipitate out and never dissolve)
please be detailed but simple. i have to write a random paper about this yet we were never taught this. it's due tomorrow and before you say i procrastinated, this was just assigned friday and the... more
Follows • 2
Expert Answers •1
Chemical Reactions

08/13/18

why heat is formed when methanol mixed with water?
when methanol mixed with water heat is formed.what is behind it 
Follows • 3
Expert Answers •2

07/26/18

Chemistry chemical reaction rate questions
For the reaction 4NH3 + 7O2 --> 4NO2 + 6H2O.   a.) Provide a valid expression for the reaction rate   b.) How is the rate at which O2 disappears related to the rate at which NO2 appears in... more
Follows • 2
Expert Answers •1
Chemical Reactions Chemistry Physics Physical Science

04/03/18

What is the heat capacity of a 30.0 gram sample of matter that cools off to 25c from 100c when 100.0 grams of 20c water are added to it?
Don't know how to start it please help.
Follows • 2
Expert Answers •1

02/25/18

Calculate the theoretical yield of salicylic acid when you start with 2.7 grams of methyl salicylate and an excess of sodium hydroxide. Assume complete conversi
Chemistry Help please!
Follows • 2
Expert Answers •1
Chemical Reactions

02/23/18

If 34.19g of NaCl react with excess of AgNo3, how many molecules will be formed?
Chemistry Question
Follows • 2
Expert Answers •1
Chemical Reactions Chemistry Chemistry Lab Kinetics

02/11/18

Order of Reaction and rate constant
The total pressure in atmospheres was recorded during the decomposition of acetaldehyde (CH3CHO(g)) at 701K for certain time intervals shown in the chart. Use the information to answer the... more
Follows • 2
Expert Answers •1

02/01/18

chemical that would react with ribitol phosphate.
i am a microbiologist, and i have a question from chemistry. i would like to know what are the possible kind of chemicals that would react with ribitol phosphate and result in a colour change or... more
Follows • 2
Expert Answers •1
Chemical Reactions

01/11/18

H2SO4 to SO3 in the desert
If we have a H2SO4 barrel in the desert, how is it possible to find SO3 on the sand near it. knowing that there is no way for the H2SO4 to reach its boiling point which is 340°C. is there any... more
Follows • 2
Expert Answers •1

12/12/17

A Zn wire and Ag/AgCl reference electrode (E° = 0.197 V) are placed into a solution of ZnSO4.
A Zn wire and Ag/AgCl reference electrode (E° = 0.197 V) are placed into a solution of ZnSO4. The Zn wire is attached to the positive terminal and the Ag/AgCl electrode is attached to the negative... more
Follows • 2
Expert Answers •1

12/11/17

A Zn wire and Ag/AgCl reference electrode (E° = 0.197 V) are placed into a solution of ZnSO4.
A Zn wire and Ag/AgCl reference electrode (E° = 0.197 V) are placed into a solution of ZnSO4. The Zn wire is attached to the positive terminal and the Ag/AgCl electrode is attached to the negative... more
Follows • 2
Expert Answers •1
Chemical Reactions Chemistry Chem Chemistry, Homework

12/10/17

At a certain temperature, this reaction establishes an equilibrium with the given equilibrium constant, Kc.  
At a certain temperature, this reaction establishes an equilibrium with the given equilibrium constant, Kc. 3A(g) + 2B(g) <------> 4C(g) Kc= 2.13x 10^17 If, at this temperature, 2.40 mol of... more
Follows • 2
Expert Answers •1
Chemical Reactions Chemistry Chem

12/10/17

Calculate the [Zn2 ] in the solution if the cell potential, Ecell, is -1.061 V.
A Zn wire and Ag/AgCl reference electrode (E° = 0.197 V) are placed into a solution of ZnSO4. The Zn wire is attached to the positive terminal and the Ag/AgCl electrode is attached to the negative... more
Follows • 2
Expert Answers •1
Chemical Reactions Chemistry Chem

12/10/17

Calculate the potential for each cell as shown below
Calculate the potential for each cell as shown below and indicate whether the metal electrode in the half-reaction opposite the standard hydrogen electrode, S.H.E., would be the anode or the... more
Follows • 2
Expert Answers •1
Chemical Reactions

11/22/17

What can i do to accelerate a chemical reaction at constant temperature
What can i to accelerate a chemical reaction at constant temperature? i know that one way is to add catalyst, Are there any other ways? 
Follows • 2
Expert Answers •1
Chemical Reactions

11/12/17

Is The rate of reaction is zero at 0 degrees?
I need to know whether the following questions is a yes or no
Follows • 2
Expert Answers •1
Chemical Reactions Math Science Chemistry

10/19/17

Can you help me with this AP Chemistry problem on reactions and cations? Thanks.
An unknown solution is tested as follows: NaCl is added and no precipitate is formed K2SO4 is added and no precipitate is formed.   Which of these cations might be present in the solution:   A.... more
Follows • 2
Expert Answers •1
Chemical Reactions Chemistry Ap Chemistry

10/19/17

Chemical Reaction and Precipitate Problem
Which substance, Na2S, NaOH, K2SO4, or KI (all 1.0M) will form a black precipitate when allowed to react with 1.0M aqueous Pb (NO3) 2?
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.