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
katrin [286]
4 years ago
14

Calcium metal is obtained by direct electrolysis of molten cacl2. if a metallurgical electrolysis apparatus operates at 28.70 a,

how many grams of calcium metal will be produced in 12 hours?
Chemistry
1 answer:
ser-zykov [4K]4 years ago
6 0
There is 1 mole of electrons = 96500C and Ca = 40 
Ca2+  + 2e --->Ca
Base on the formula above it means that there are 2 moles of electrons to produce 1 mole of calcium.

96500C x 2 = 193000C

193000C electricity produce 40g Calcium

Coulombs = Amps x seconds   (28.70A for 12 hours)
= 28.70A x 12 x 60 x 60 C
= 1 239 840 C

This amount of electricity will produce 

=1239840 / 193000 x 40g Calcium
= 6.42 x 40 g Calcium
= 256.96 g

So there will be 256.96g of Calcium metal that will be produced in 12 hours. 
You might be interested in
example best shows that the chemistry of water is helpful to plants? Water’s polarity produces a high density, which allows wate
Gennadij [26K]
The right answer for the question that is being asked and shown above is that: "Water’s polarity produces a high density, which allows water to move to the leaves." Example best shows that the chemistry of water is helpful to plants is that <span>Water’s polarity produces a high density, which allows water to move to the leaves.</span>
8 0
3 years ago
Read 2 more answers
Which fire symbol signifies ammunition with a mass explosion?
marissa [1.9K]

The answer is Fire symbol 1  

That is Fire symbol 1, signifies ammunition with a mass explosion.

The symbol can be seen in the image attached.

This symbol includes these :

1. Do not use fire fighting unless rescue attempt is planned.

2. If person's safety is in danger, use cover.

This fire symbol 1 signifies ammunition with a mass explosion.


4 0
3 years ago
The solution you identified in question (1) acts as a buffer due to reactions that occur within the solution when an acid or a b
weeeeeb [17]

Answer:

The answer is "\bold{CH_3COO^{-} \ (aq) + H^{+}\ (aq) \longrightarrow CH_3COOH \ (aq)}"

Explanation:

When HCI is added in the chemical equation it reacts with sodium acetate so, it will give the following chemical equation:

CH_3COONa\ (aq) + HCl\ (aq)\longrightarrow CH_3COOH\ (aq) + NaCl\ (aq)\\\\

 In this, the CH_3COOH is a weak acid so, it not completely dissociated.

CH_3COONa \ (aq) \ \ and \ NaCl were strong electrolytes they are completely dissociated.

The HCl is a strong acid so, it is completely dissociated So, the net ionic equation is:

CH_3COO^{-} \ (aq) + H^{+}\ (aq) \longrightarrow CH_3COOH \ (aq)

8 0
3 years ago
Write an overall equation for the acid-base reaction that would be required to produce the following salt. MgCl2
harina [27]
Mg+Cl2--> MgCl2

Magnesium plus chlorine equals magnesium chloride
7 0
3 years ago
Read 2 more answers
When planning a simple experiment, what does it mean to “test one variable”?
SSSSS [86.1K]

Answer:

I believe the answer is "b". "During the experiment, the scientist has only one element, or variable, that is changed to test the hypothesis."

Explanation:

I remember from last year but I'm not totally sure. Good luck!

3 0
3 years ago
Other questions:
  • Nickel has a face-centered cubic unit cell with an edge length of 352.4 pm. Calculate the density of nickel
    6·1 answer
  • Answer please I will give brainiest
    5·1 answer
  • Is cocl and hcl reaction exothermic or endothermic?
    14·1 answer
  • 1
    10·1 answer
  • Precision can be defined as the?
    12·1 answer
  • A 0.060 kilogram ice cube at 0.0 degrees celsius is placed in a glass containing 0.250 kilograms of water at 25 degrees celsius.
    14·2 answers
  • What is the concentration of a 300 mL solution containing 0.27 mol of glucose?
    13·1 answer
  • What mass of Cu(s) is electroplated by running 19.5 A of current through a Cu2 (aq) solution for 4.00 h
    12·1 answer
  • All acid base indicators ____
    9·1 answer
  • When 15.0 g of fluorite (CaF₂) reacts with excess sulfuric acid, hydrogen fluoride gas is collected at 744 torr and 25.5°C. Soli
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!