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Pavel [41]
3 years ago
12

Which of these elements could be used in industry to control electron flow?

Chemistry
1 answer:
anzhelika [568]3 years ago
6 0

Answer:

the answer is calcium

Explanation:

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Consider the reaction cacn2 + 3 h2o → caco3 + 2 nh3 . how much nh3 is produced if 187 g of caco3 are produced? 1. 2.13 mol 2. 63
kodGreya [7K]
Equation is as follow,
   
<span>                               CaCN</span>₂<span> + 3 H</span>₂<span>O   →   CaCO</span>₂<span> + 2 NH</span>₃

According to this equation, 
When,
100 g CaCO₃ (1 mole) is produced when  =  34 g NH₃ (2 moles) is produced
So,
187 g CaCO₃ will be produced then  =  X g of NH₃ will produce

Solving for X,
                                 X  =  (187 g × 34 g) ÷ 100 g

                                 X  =  63.58 g of NH₃ will be produced

Result:
          Option-2 is correct answer.
5 0
4 years ago
Which has not been a major source of CFCs
ipn [44]

Answer : Any natural sources of CFC's are not known only the major sources like aerosols, propellants, refrigerants,etc are known. So, if any natural sources are given then it cannot be called as a major source for emitting CFC into environment.

4 0
4 years ago
Read 2 more answers
The element with 8 electrons in its 3d sub level is what?
DochEvi [55]
The answer is nitrogen
8 0
3 years ago
Lithium, sodium and potassium all belong to the same group of the periodic table.
Lady_Fox [76]

Answer:

Yes they are found in same period

4 0
3 years ago
Read 2 more answers
How much heat energy is required to raise the temperature of 0.367 kg of copper from 23.0 C to 60.0 C ? The specific heat of cop
mojhsa [17]
Note: We must keep the units we use consistent. The Cp is given in cal/gC so we will use cal for energy, grams for mass and C for temperature.
1)
Heat supplied can be calculated using:
Q = mCpΔT; where m is the mass, Cp is the specific heat capacity and ΔT is the temperature change.
Q = 367 x 0.092 x (60 - 23)
Q = 125 Cal

2)
Using the same equation:
125 = 60 x 0.092 x (T - 23)
T = 45.6 C
5 0
3 years ago
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