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Andrews [41]
3 years ago
6

In the process of electrolysis, current can flow through a liquid because A. water molecules become negatively charged. B. hydro

gen is electrically neutralized in the solution. C. negative ions are attracted to the anode. D. cations of the electrolyte accumulate at the positive electrodes.
Chemistry
2 answers:
Liula [17]3 years ago
4 0
<span>B. Hydrogen is electrically neutralized in the solution. Hydrogen is a chemical element with symbol H and atomic number 1. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table.</span>
OleMash [197]3 years ago
3 0

The correct answer is<u><em> </em></u>


<u><em>C. Negative ions are attracted to the anode.</em></u>

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A number is six more than 1/2 of another number
xenn [34]

Answer:

x = 11.

This checks out since 11 + 10 = 21.

Explanation:

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3 years ago
If 84.1 g of NaOH and 51.0 g of Al and 25.0 g H20 react which chemical is the limiting reactant?
12345 [234]

Answer:

  • <u><em>H₂O</em></u>

Explanation:

<u>1. Chemical quation</u>

The reaction of aluminium, sodium hydroxide and water is represented by the balanced chemical equation:

  • 2Al(s) + 2NaOH(s) + 6H₂O(l) → 2Na[Al(OH)₄] (aq) + 3H₂(g) ↑

The coefficients of each reactant and product give the theoretical mole ratios.

To find the limiting reactant you compare the theoretical ratios with the ratio of the available substaces.

<u>2. Theoretical mole ratio:</u>

  • 2 mol Al : 2 mol NaOH : 6 mol H₂O

Equivalent to

  • 1 mol Al : 1 mol NaOH : 3 mol H₂O

<u>3. Actual ratio</u>

a) Convert each mass to number of moles

Formula:

  • number of moles = mass in grams / molar mass

Al:

  • molar mass = atomic mass = 26.982g/mol
  • number of moles = 51.0g / 26.982g/mol = 1.89 mol

NaOH:

  • molar mass = 39.997g/mol
  • number of moles = 84.1g / 39.997g/mol = 2.10 mol

H₂O:

  • molar mass = 18.015g/mol
  • number of moles = 25.0g / 18.015g/mol = 1.39 mol

Divide all the mole amounts by the least number:

  • Al: 1.89/1.39 = 1.36
  • NaOH: 2.10 = 1.52
  • H₂O: 1.39 = 1.00

  • 1.36 mol Al : 1.52 mol NaOH : 1.00 mol H₂O

<u>4. Comparison</u>

<u />

Theoretical ratio:

  • 1 mol Al : 1 mol NaOH : 3 mol H₂O

Actual ratio:

  • 1.36 mol Al : 1.52 mol NaOH : 1.00 mol H₂O

     Multiply by 3:

  • 4.08 mol Al : 4.56 mol NaOH : 3.00 mol H₂O

Now, yo can see that the first two are in excess with respect the third one, making that the water consumes first, before any of the other two consumes. Therefore, the limiting reactant is the water.

8 0
3 years ago
Pedro adds 3.23 moles of helium to a balloon that already contained 4.51 moles of helium creating a balloon with a volume of 9.8
sashaice [31]

Answer:

7.The answer is 2.13 because if u add 3.23 and 4.51 and the answer is 7.74 and u add 2.13 to get 9.87. 3.23 + 4.51 + 2.13 is 9.87

Explanation:

5 0
3 years ago
How does an ionic bond differ from a covalent bond?
Usimov [2.4K]

Answer:

Ionic bonds transfer electrons and covalent bonds share electrons.

Explanation:

Ionic bonds tend to transfer electrons completely. Take NaCl for example.

Cl has 7 valence electrons.

Na has 1 valence electron.

To stabilize themselves, either with a full 8 shells or full outer shell, Cl wants 1 electron and Na wants to lose 1 electron. So when NaCl forms, Na donates its electron to Cl.

In a covalent bond, the electrons are shared. Water can be used as an example. The electrons in water usually are around the oxygen, but sometimes it is around the hydrogens.

6 0
3 years ago
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