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4vir4ik [10]
3 years ago
10

How many electrons does hydrogen need in order to have a full shell of valence electrons?

Chemistry
1 answer:
eimsori [14]3 years ago
6 0

Answer:

It only needs one electron.

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In the reaction, H2SO4. +. H2O -------> HSO4- +. H3O+ The Base is ____________ a H2SO4 b H3O+ c H2O d HSO4-
expeople1 [14]
The base is H2O because it is accepting an H+ ion.
5 0
3 years ago
(a) ions in a certain volume of .20M NaCl (aq) are represented in the box above on the left. in the box above on the right, draw
mamaluj [8]

Answer:

  • The first picture attached is the diagram that accompanies the question.

  • The<u> second picture attached</u> is the diagram with the answer.

Explanation:

In the box on the left there are 8  Cl⁻ ions and 8 Na⁺ ions.

The dissociaton equation for NaCl(aq) is:

  • NaCl (aq) → Na⁺ (aq) + Cl⁻(aq)

The dissociation equation for CaCl₂ (aq)  is:

  • CaCl₂ (aq) → Ca²⁺ (aq) + 2Cl⁻(aq)

A 0.10MCaCl₂ (aq) solution will have half the number of CaCl₂ units as the number of NaCl units in a 0.20M NaCl (aq) solution.

Thus, while the 0.20M NaCl (aq) solution yields 8 ions of Na⁺ and 8 ions of Cl⁻, the 0.10MCaCl₂ (aq) solution will yield 4 ions of Ca²⁺ (half because the concentration if half)  and 8 ions of Cl⁻ (first take half and then multiply by 2 because the dissociation reaction).

Thus, your drawing must show 4 dots representing Ca²⁺ ions and 8 dots representing Cl⁻ ions in the box on the right.

4 0
3 years ago
alculate the molarity of a solution that contains 20.0grams of sodium hydroxide in 200. ml of solution.
valentina_108 [34]

The molarity of a solution that contains 20.0grams of sodium hydroxide in 200. ml of solution is 2.3 M.

<h3>What is Molarity? </h3>

Molarity is defined as the ratio of number of moles of solute to the volume of the solution.

Molarity = number of moles of solute/ Volume of solution

Given,

given mass of sodium hydroxide= 20 g

Volume of the solution = 200 mL.

Firstly, we will calculate the moles of sodium hydroxide.

<h3>What is Mole? </h3>

Mole is defined as the ratio of given mass of substance to the molar mass of substance.

Mole = given mass/ molar mass

Molar mass of sodium hydroxide = 40 g

Mole = 20/40

= 0.5 mol

Molarity = (0.5/ 200) × 1000 = 2.5M

Thus, we calculated that the molarity of a solution that contains 20.0grams of sodium hydroxide in 200. ml of solution is 2.3 M.

learn more about Molarity:

brainly.com/question/19517011

#SPJ4

5 0
2 years ago
Calculate the cell potential, Ecell, of a concentration cell containing a 0.1 M solution of Zn2 and a 1.0 M solution of Zn2
Agata [3.3K]

Answer:

The cell potential is 0.0296V

Explanation:

Please see the attachment below

3 0
3 years ago
A piece of wood displaces 12.5 mL of water and has a density of 0.97 g/ml. what is the mass of the piece of wood? what will happ
mr Goodwill [35]

Density=0.97g/mL

Volume=12.5mL

\\ \sf \longmapsto Density=\dfrac{Mass}{Volume}

\\ \rm\longmapsto Mass=Density(Volume)

\\ \sf \longmapsto Mass=0.97(12.5)

\\ \sf \longmapsto Mass=12.125g

7 0
3 years ago
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