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labwork [276]
3 years ago
14

Help!!! chemistry electrolysis

Chemistry
1 answer:
Tpy6a [65]3 years ago
5 0
Electrolysis can be used to separate a substance into its original components/elements and it was through this process that a number of elements have been discovered and are still produced in today's industry.
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What is the answer to...
adoni [48]

Answer: short answer short 0.65 / 5.37

15% NaOH by mass is 15g of NaOH in (100-15)g of solution.

No. Of moles of NaOH in solution = 0.65

No of moles of Water in solution = 4.72

Mole Fraction =  

(

(Moles of Solvent)

(Moles Of Solute)+(Moles of Solvent)

)

OR

(

(Moles of Solvent)

Total Number Of Moles

)

= 0.65 / 5.37

= 0.121

Explanation:

Hope this helped

8 0
3 years ago
.
Amiraneli [1.4K]

Answer:

C

Explanation:

The reason why C is true is because this species of plant requires certain things to survive, and without said requirements they will die. Hence, the animal that is unable to compete will die and be eliminated from the ecosystem. Hope that helps!

6 0
3 years ago
A total of 620 C of charge passes through a flashlight in 0.510 h. What is the average current in milliamperes?
aniked [119]

Explanation:

The given data is as follows.

               Q = 620 C,         t = 0.510 hour

First, we will convert hours into seconds. Since, there are 3600 seconds present in 1 hour. Hence, number of seconds present in 0.510 hour are as follows.

                   0.510 hr \times \frac{3600 sec}{1 hr}

                     = 1836 sec

Therefore, we will calculate the average current as follows.

                      I = \frac{Q}{t}

                        = \frac{620 C}{1836 sec}

                        = 0.337 C/sec

It is known that,

                      1 C/sec = 1000 mA

So,             0.337 C/sec \times \frac{1000 mA}{1 C/s}

                    = 337 mA

Thus, we can conclude that the average current in milliamperes is 337 mA.

4 0
3 years ago
Calculate the amount in grams of Na2CO3 needed to react with HCL to produce 120g NaCl
worty [1.4K]
Let's start off with the balanced chemical equation:

Na_2CO_{3_{(s)}} + \textbf2HCl_{_{(aq)}}\rightarrow CO_{2_{(g)}} + H_2O_{_{(l)}} + \textbf2NaCl_{_{(aq)}}

Assuming the sodium carbonate is the limiting reagent, look at the coefficients of sodium carbonate and sodium chloride and use those as a ratio of sodium carbonate to sodium chloride: 1:2.

Since you have the required mass of NaCl, convert this to moles.

Assuming you know how to find the molar mass of NaCl:

M_{NaCl} = 58.44g/mol
n = \frac{m}{M}
n_{NaCl} = \frac{120g}{58.44g/mol}
n_{NaCl} = 2.053mol

Using the ratio, since 1 mole of sodium carbonate is required to produce 2 moles of sodium chloride, cross-multiply the ratios:

1:2 = x:2.053mol
2x = 2.053mol
x = 1.027mol

Therefore 1.027 moles of sodium carbonate is required to produce the required amount of sodium chloride. Convert to mass for your final answer:

n_{Na_2CO_3} = 1.027mol
M_{Na_2CO_3} = 105.99g/mol
m = nM
m = (1.027mol)(105.99g/mol)
m_{Na_2CO_3} = 108.85g

Hope this helps :)
6 0
3 years ago
What are the examples of catalystic reactions​
77julia77 [94]
The manufacture of epoxyethane from ethene.
The halogenation of benzene.
The reaction with chlorine. The reaction with bromine.
The Friedel-Crafts alkylation of benzene.
The Friedel-Crafts acylation of benzene.
7 0
2 years ago
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