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3 years ago

Which one(s) below right about valence electrons?

2 answers:

7 0

Valence electrons are in the outermost area, have the highest energy, and are all electrons of the atom. This would be A,C and D. B might be a variable, as the Alkali Metals are highly unstable.
Electrons described by E are in Ground State.

grandymaker [24]3 years ago

3 0

Answer choice A, B, and C is right about the valence electrons. For answer choice D and E, Would in it be a more of an element kind of choice. whether the element is closer to the left side of the periodic table or not determines the high and low energy.

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In the following redox reaction which is the oxidizing agent and which is the reducing agent? AlCl3 + Na NaCl + Al

horrorfan [7]

Answer : Al

Explanation :

- For a given redox reaction there must be an oxidizing agent/(s) and a reducing agent/(s).

- the oxidizing agent is the substance that undergoes reduction process (gaining electrons or loss of oxygen atoms), meanwhile, the reducing agent is the substance that undergoes oxidation process (loss of electrons or gaining of oxygen atoms).

- In the reaction above, the oxidation number of (Al) in AlCl3 is (3+). However, the oxidation number of (Al) in the products is zero because it exists as a single element.

Therefore, changing from (3+) to zero means gaining of (3) electrons to neutralize the previously existing (3) protons on (Al) in AlCl3.

So Al is the oxidizing agent..

4 0

3 years ago

How many moles of hydrogen gas will be produced when 12 g of Mg will react completely with excess of an acid according to the fo

lina2011 [118]

Answer:

0.49 mol

Explanation:

Step 1: Write the balanced equation

Mg + 2 HCI ⇒ MgCl₂ + H₂

Step 2: Calculate the moles corresponding to 12 g of Mg

The molar mass of Mg is 24.31 g/mol.

$12g \times \frac{1mol}{24.31g} = 0.49mol$

Step 3: Calculate the moles of H₂ produced by 0.49 moles of Mg

The molar ratio of Mg to H₂ is 1:1. The moles of H₂ produced are 1/1 × 0.49 mol = 0.49 mol.

7 0

3 years ago

How do you name AsO3

Elena-2011 [213]

CVOPEDIA-CVOSOFT

Explanation:

ESPERO TE SIRVA

4 0

3 years ago

The strength of an acid is affected by the polarity of the bond connected to the acidic hydrogen. The more highly polarized this

Shtirlitz [24]

Answer:

The answer is " $\bold{HClO_3 > HClO_2 >HClO > HBrO}$ "

Explanation:

We arrange oxoacids to decrease the intensity of acids in this question. Or we may conclude all this from strongest to weakest acids they order oxoacids, that's why above given order is correct.

5 0

3 years ago

Predict which of the following metals reacts with hydrochloric acid.

VashaNatasha [74]

Answer:

Pb, Cr, Fe

Explanation:

6 0

3 years ago