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
irinina [24]
2 years ago
14

Hydrogen gas is a non polluting fuel hydrogen gas may be prepared by electrolysis of water. 2 H20 (l) --> 2H2(g) +O2(g) Predi

ct the signs of delta H and Delta S for the production of hydrogen gas by electrolysis of water
a. delta h > 0 and delta S >0
b.delta h <0 and delta S >0
c.delta H >0 and delta S <0
d. delta h <0 and delta s <0
e. delta H=0 and delta s <0
Chemistry
1 answer:
goldfiish [28.3K]2 years ago
6 0
I think the correct answer from the choices listed above is option B. The correct signs for <span>delta H and Delta S for the production of hydrogen gas by electrolysis of water would be that </span><span>delta h <0 and delta S >0. Hope this answers the question.</span>
You might be interested in
I give brainiest if u help <br> Need help with 1 and 2a
Alekssandra [29.7K]

Explanation:

fancy number to a delocalized electrons are electrons that move randomly throughout the metallic structure

6 0
3 years ago
Read 2 more answers
Picric acid has been used in the leather industry and in etching copper. However, its laboratory use has been restricted because
olchik [2.2K]

Answer:

0.3023 M

Explanation:

Let Picric acid = H_{picric}

So,  H_{picric}     +       H_2}O          ⇄      H_3}O^+     +     Picric^-

The ICE table can be given as:

                          H_{picric}     +       H_2}O          ⇄      H_3}O^+     +     Picric^-

Initial:                0.52                                               0                  0

Change:             - x                                                 + x                 + x

Equilibrium:      0.52 - x                                        + x                 + x

Given that;

acid dissociation constant  (K_a) = 0.42

K_a = \frac{[H_3O^+][Picric^-]}{H_{picric}}

0.42 = \frac{[x][x]}{0.52-x}}

0.42 = \frac{[x]^2}{0.52-x}}

0.42(0.52-x) = x²

0.2184 - 0.42x = x²

x²  + 0.42x - 0.2184 = 0                   -------------------- (quadratic equation)

Using the quadratic formula;

\frac{-b+/-\sqrt{b^2-4ac} }{2a}    ;     ( where +/-  represent ± )

= \frac{-0.42+/-\sqrt{(0.42)^2-4(1)(-0.2184)} }{2*1}

= \frac{-0.42+/-\sqrt {0.1764+0.8736} }{2}

= \frac{-0.42+\sqrt {1.0496} }{2}     OR   \frac{-0.42-\sqrt {1.0496} }{2}

= \frac{-0.42+1.0245}{2}       OR    \frac{-0.42-1.0245}{2}

= \frac{0.6045}{2}                 OR    -\frac{1.4445}{2}

= 0.30225          OR     - 0.72225

So, we go by the +ve integer that says:

x =  0.30225

x = [ H_3}O^+ ] = [   Picric^- ] =  0.3023  M

∴  the value of  [H3O+] for an 0.52 M solution of picric acid  = 0.3023 M     (to 4 decimal places).

6 0
3 years ago
Which of the following is NOT true regarding sexual reproduction?
mel-nik [20]
Answer: I think it’s B

explanation
4 0
2 years ago
Read 2 more answers
According to "When Is a Planet Not a Planet?" scientists determined that Pluto was not a planet. What were the causes that led t
kap26 [50]
C.
D.
E.

These should be the main reasons. As Pluto was mainly categorized in dwarf planet for not being able to satisfy the last statement which states that it should have a fixed neighbourhood with other planets.
5 0
3 years ago
Why are the electrons in a nitrogen-phosphorus covalent bond not shared equally? which atom do the electrons spend more time aro
a_sh-v [17]
<span>Electrons in a nitrogen-phosphorus covalent bond are not shared equally because nitrogen and phosphorus do not have the same electronegativity. The atoms spend more time around the most electronegative atom nitrogen.</span>
6 0
3 years ago
Other questions:
  • In what type of reaction does a single uncombined element replace another element in a compound?
    12·1 answer
  • Angelo wants to develop a new series of pots and pans for use in cooking. Which property of metals should he be most concerned a
    5·1 answer
  • We can see because light is
    11·1 answer
  • Please help solving number 48.
    10·1 answer
  • Compartments A and B are separated by a membrane that is permeable to K+ but not to Na+ or Cl-. At time zero, a solution of KCl
    9·1 answer
  • pls help If we multiply the mass of an object and the acceleration due to gravity, we find the downward force of the object whic
    5·1 answer
  • 30 grams FO2 to molecules
    11·1 answer
  • The currently accepted model of the atom includes an electron cloud.<br> A. True<br> B. False
    13·2 answers
  • Please help!!!! Really need to know this!!
    8·1 answer
  • A student places 6.00 cups of water in a beaker. Two cups of water have the weight of 1.00 pounds. How much heat is needed to ra
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!