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
mina [271]
3 years ago
15

What mass of aluminum will be deposited on the cathode if an electric current of 0.15 a is run for 4 5s when a solution of al(no

3 )3 is subjected to electrolysis?
Chemistry
1 answer:
marishachu [46]3 years ago
3 0

Mass of Al, m= ?

Molar mass of copper Al, M = 27.0 g/mol

time, t = 45 s

current , c = 0.15 A

valency of Al in Al(NO₃)₃ , z = +3

From Faraday's 1st law,

m = Mct/zF

where F = Faraday constant = 96500 C/mol

Substitute all the values,

m = [(27.0 g/mol) (0.15 A) (45 s)]/ [3] [96500 C/mol]

= 6.3 x 10⁻⁴ g

Mass of aluminium = 6.3 x 10⁻⁴ g

Therefore, mass of aluminium plated on electrode =  6.3 x 10⁻⁴ g

You might be interested in
Manganese(IV) oxide is reduced to manganese(II) oxide by hydrogen gas. Include all phases in answer
liq [111]
<span><span>Mn<span>O<span>2<span>(s)</span></span></span>+<span>H<span>2<span>(g)</span></span></span>→Mn<span>O<span>(s)</span></span>+<span>H2</span><span>O<span>(g)</span></span></span></span>
4 0
3 years ago
What is the density (g/mL) of an object that has a mass of 0.03 kg and occupies a volume of 25 mL?
tatyana61 [14]
First convert the kg to g ----- 0.03kg = 30g
Then divide the mass by the volume ----- 30g ÷ 25mL = 1.2
The density is 1.2g/mL<span />
5 0
3 years ago
Read 2 more answers
The average rate of consumption of br− is 1.86×10−4 m/s over the first two minutes. what is the average rate of formation of br2
Scorpion4ik [409]
By considering the reaction equation is:
5Br(aq)+BrO3(aq)+6H(aq)= 3Br2(aq)+3H2O(l)
when the average rate of consumption of Br = 1.86x10^-4 m/s
So from the reaction equation 
5Br → 3Br2 when we measure the average rate of formation (X) during the same interval So,
∴ 1.86x10^-4/5 = X / 3
∴X = 1.1 x 10^-4 m/s
∴the average rate of formation of Br2 = 1.1x10^-4 m/s


7 0
3 years ago
In an investigation with density, Marcia’s teacher measures the mass and volume of 10 different samples of a substance. The samp
valina [46]

Answer:

Mass  

Step-by-step explanation:

Usually, you plot the independent variable along the horizontal (x) axis and the dependent variable along the vertical (y) axis.

Marcia's teacher plotted the mass of the sample along the x-axis and volume along the y-axis.

The mass is the independent variable, because that is <em>what the teacher varied</em>.

The volume is the <em>dependent variable</em>, because it <em>depends</em> on the mass.

Sample number is <em>wrong</em>, because it is not a variable.

Substance is <em>wrong</em>, because all samples consist of the same substance.

Density is <em>wrong</em>, because it is constant. It is the slope of the graph.

3 0
3 years ago
Read 2 more answers
PLEASE HELP
alukav5142 [94]

Answer:

will form bonds between atoms. for more details are in the pic

7 0
3 years ago
Other questions:
  • Predict the effect of a mutation which limits the production of pigment in hair
    5·1 answer
  • Important: How much energy would be required to vaporize 45.0 grams of water?
    8·1 answer
  • Identify the conjugate acid-base pair in this balanced equation:<br> H2SO4 + 2NaOH → 2H2O + Na2SO4
    8·2 answers
  • In a rate law, the rate constant, k, depends on which condition
    12·1 answer
  • The difference betweeen chemical cell and electrolytic cell ?​
    14·1 answer
  • 1. If 2 moles of hydrogen combine with one mole of oxygen, how many moles of water are<br> produced?
    13·1 answer
  • A main group element with the valence electron configuration 3s23p1 is in periodic group __________. It forms a monatomic ion wi
    5·1 answer
  • Which of the following are true about both the sun and the stars? Choose the three correct answers.
    7·1 answer
  • Osmosis is the process in which _______ diffuses across a cell membrane.
    13·2 answers
  • What is the name of this molecule?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!