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
Calculate the power provided by a 12 volt car battery with a rating of 350 amperes.
mamaluj [8]

Answer:

Option D

4200 W

Explanation:

Power, P is also given as the product of voltage and current, expressed as P=VI

Here, P is power, V is voltage in the xircuit and I is current theough voltage.

Taking 12 V for voltage across and 350A for current across circuit then power will be

P=350*12=4200 W

Therefore, option D is correct.

8 0
3 years ago
Which has more momentum, a small object moving 10 miles per hours or a large object at rest?
xeze [42]
Well the object will have no Momentum since it is not moving, so a small object that is going 10 mph will have Momentum.
3 0
3 years ago
What is most likely the amount of energy available at a trophic level of primary consumers if the amount of energy available to
docker41 [41]

Answer:

200 kilocalories

Explanation:

6 0
2 years ago
PLEASE ANSWER ASAP
Sedbober [7]

Answer:

B.

Explanation:

The water collects in the ocean; it is then evaporated by the sun. After evaporation the water turns into water vapor, it then condenses to form clouds.

3 0
3 years ago
At a certain location, a gravitational force with a magnitude of 350 newtons acts on a 70.-kilogram astronaut. What is the magni
creativ13 [48]

Answer:

3. 5.0N/kg

Explanation:

Gravitational field strength = gravitational force/mass of astronaut = 350N/70kg = 5.0N/kg

6 0
3 years ago
Other questions:
  • Which physical property causes you to lean to one side when the bus you are traveling in takes a sharp turn?
    10·1 answer
  • A car traveling at 7.0 m/s accelerates uniformly at 2.5 m/s2 to reach a speed of 12.0 m/s. how long does it take this accelerati
    14·1 answer
  • What element in the periodic table is the basis of all organic molecules
    5·1 answer
  • Liz puts a 1 kg weight and a 10 kg on identical sleds. She then applies a 10N force to each sled. Describe why the smaller weigh
    14·2 answers
  • Which of the following would have the strongest electric field? MULTIPLE CHOICE.
    9·1 answer
  • Which is the relationship between photon energy and the color of light?
    6·1 answer
  • A biker starts moving from rest with a constant acceleration of 2.0 m/s^2. What is his velocity after 5.0 s?
    15·1 answer
  • If density of an object is 3gcm-3, will it float or sink in water.
    5·1 answer
  • help me please ASAP ​
    10·1 answer
  • What is the speed of an object at a given moment
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!