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
Firdavs [7]
3 years ago
12

An electrolytic cell can be used to plate gold onto other metal surfaces. The plating reaction is: Au (aq) e- --> Au(s) Notic

e from the reaction that 1 mol e- plates out 1 mol Au(s). Use this stoichiometric relationship to determine how much time is required with an electrical current of 0.200 amp to plate out 0.400 g Au. The amp is a unit of electrical current equivalent to 1 C / s. (Hint: Recall that the charge of an electron is 1.60 x 10-19 C.)
Physics
1 answer:
Dmitriy789 [7]3 years ago
4 0

Answer:

Explanation:

Faraday’s constant can be used to convert the charge (Q) into moles of electrons (n). The charge is the current (I) multiplied by the time

Q = I × t = n × F

Where

Q is charge

I is current = 0.2A

t is time = ?

n is number of mole

F is Faraday constant = 96500C/s

Mass of Au = 0.4 g = 0.0004kg

Molar mass of Au = 197 g/mol

Malar mass = mass / mole

n = 0.4 / 197

n = 2.03× 10^-3 mol

n = 0.00203 mol

t = n × F / I

t = 0.00203 × 96500 / 0.2

t = 979.7 seconds

t = 16.32 minutes.

You might be interested in
What is evaporation? Condensation? Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
krok68 [10]

Answer:

Evaporation is the physical change in which a substance converts from its <u>liquid</u> state to its <u>gaseous</u> state. Condensation is the physical change in which a substance converts from its <u>gaseous</u> state to its <u>liquid</u> state.

Explanation:

Evaporation and condensation are opposite processes to each other. Evaporation changes a liquid to a gas and condensation is the reverse.

7 0
3 years ago
A ball rolls for 8 seconds and travels 24 meters. How fast was it traveling?
belka [17]

Answer:

The speed of the ball was, v = 3 m/s

Explanation:

Given data,

The time period of the ball, t = 8 s

The distance the ball rolled, d = 24 m

The velocity of an object is defined as the object's displacement to the time taken. The formula for the velocity is,

                              v = d / t      m/s

Substituting the given values in the above equation,

                               v = 24 / 8

                                  = 3 m/s

Hence, the speed of the ball was, v = 3 m/s

8 0
3 years ago
What type of radioactive decay is shown in this equation?
svp [43]
There is no <span>radioactive decay</span>
6 0
3 years ago
A 110-kg tackler moving at a speed of 3.5 m/s
IgorC [24]
What exactly do u want me to know step by step with me plz I am a slow person
6 0
3 years ago
You are riding on a Ferris wheel that is rotating with constant speed. The car in which you are riding always maintains its corr
nirvana33 [79]
It's going down.

Hope this helps you
5 0
3 years ago
Other questions:
  • When used in physical therapy, a diathermy machine gives the sensation of "deep heat" in the tissue being treated.
    8·1 answer
  • A certain mountain road is inclined 3.1° with respect to the horizon. what is the change in altitude of the car as a result of i
    5·1 answer
  • Which BEST describes the speed and velocity of the graph?
    13·2 answers
  • If the weight of an object of mass "m" is "mg," then the weight of an object of mass "2m" is
    13·2 answers
  • Which best describes how heat energy moves within a system?
    6·2 answers
  • When very electronegative atoms, like oxygen, bond to atoms with a lower
    9·2 answers
  • 1. A block of aluminum occupies
    15·1 answer
  • How can I find the vertical velocity
    15·1 answer
  • How can we find velocity?*
    14·1 answer
  • Wyobraź sobie, że na swoje urodziny dostajesz wymarzony prezent. Opisz uczucia którę Cię ogarniają. Wykorzystaj przynajmniej trz
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!