1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Natalija [7]
3 years ago
13

Calculate the [H3O+] of solutions a and b; calculate the [OH-] solutions c and d.

Chemistry
1 answer:
patriot [66]3 years ago
3 0

Answer:

I got the answers but it won't let me post it correctly on here....

Explanation:

9.) 10-2.76 =0.0174 [H30+]= 1.74*10-3 M

10.)10-3.65=0.00224  [H3O+] =2.24*10-2 M

11.)10-3.65=0.00224 [OH-]= 2.224*10-4M

12.)10-6.87=0.00000135  [OH-]= 1.35*10-7M

You might be interested in
Percent occurrence and isotope masses for oxygen: 99.759 % at 15.99491 amu, 0.037% at 16.99913 amu and 0.204% is at what amu val
Masja [62]

Answer:

15.99937 is the value of this question answer

4 0
3 years ago
A chemist wants to calculate the amount of heat that is absorbed by a sample of copper as it is melted. Which constant should sh
34kurt

The constant used for the absorption of heat by the sample in melting is +\Delta H_{fus}.  Thus, option A is correct.

The chemical reaction has been defined as the energy in which the energy has been released or absorbed for the breaking of bonds in the reactants and the formation of product.

<h3>Constant for energy absorbed</h3>

The energy has been absorbed in the melting of the copper sample. Thus, the sample has been converted from the solid to the liquid state.

The change in energy with the conversion in solid and liquid state has been termed as heat of fusion.

The energy has been absorbed by the system, thus it has been marked with the positive sign.

Therefore, +\Delta H_{fus} has been the constant used for the absorption of heat by the sample in melting. Thus, option A is correct.

Learn more about melting sample, here:

brainly.com/question/8828503

8 0
2 years ago
How many moles of copper are needed to react with sulfur to produce 0.25 moles Ol
Tems11 [23]

Answer:

                       0.50 moles of Cu

Explanation:

                    The balanced chemical equation for given synthetic reaction is,

                                          2 Cu + S → Cu₂S

According to balance chemical equation,

                  1 mole of Cu₂S is produced by  =  2 moles of Cu

So,

          0.25 moles of Cu₂S will be produced by  =  X moles of Cu

Solving for X,

                      X  =  0.25 mol × 2 mol /  1 mol

                      X  =  0.50 moles of Cu

Hence, as the molar ratio of Cu to Cu₂S is 2:1 hence, to produce 0.25 moles of Cu₂S we will need 0.50 moles of Cu.

6 0
3 years ago
What is an environmental hazard created by humans?
Yuliya22 [10]
Environmental Hazards are usually any chemicals that donot naturally occur to exist anywhere and are usually made in the fields of industry or experimental sciences
So if you happen for example to throw a bit of mercury in some river while being in a school trip then this is an environmental hazard created by humans
5 0
3 years ago
Which phrase describes a plateau?
Rina8888 [55]

Answer:

I think it's surface cut by streams

8 0
2 years ago
Read 2 more answers
Other questions:
  • How many moles of MgS2O3 are in 221 g of the compound?
    15·1 answer
  • What kind of chemist studies chemical reactions involved in photosynthesis the process that plants use to make food?
    12·1 answer
  • Which of the following are correctly balanced reactions
    8·2 answers
  • when salt is added to water how does it affect the water's freezing points? Explain the science behind how this works at the par
    5·1 answer
  • How much Sr(OH)2 • 8 H2O (M = 265.76) is needed to
    12·1 answer
  • How is a mole like a dozen?
    6·2 answers
  • What are middle-latitude cyclones?
    11·1 answer
  • Which statements explain the relationship between mass, velocity and kinetic energy? Select the TWO (2) that apply.
    7·1 answer
  • An 8-year-old child fell to the ground from an 8-foot-high playground structure. He is lying on his back and moving very little.
    14·2 answers
  • How far will a rocket travel in 5s if it is moving 80m/s?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!