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babunello [35]
3 years ago
14

Help! giving brainliest.

Chemistry
1 answer:
Zigmanuir [339]3 years ago
7 0

Answer:

A

Explanation:

will group 2 elements gain electrons to bond with non-metals in group 16 in a 2:1 ratio

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Which of these is not a gas? hydrogen, oxygen, gravity, or helium
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Answer:

I think that Gravity is not considered a gas but it can at the same time

Explanation:

Gasses are affected by gravity, as above video will prove. ... Yes, there is a attractive force between the gas molecules and gravity !

The rest are for sure gases

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3 years ago
2Ag (s) + H2S(s) → Ag2S(s) + H2(g)
Advocard [28]

Answer: Oxidation half: 2Ag\rightarrow 2Ag^++2e^-

Reduction half: 2H^++2e^-\rightarrow H_2

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

2Ag(s)+H_2S(s)\rightarrow Ag_2S(s)+H_2(g)

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

Oxidation half: 2Ag\rightarrow 2Ag^++2e^-

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

Reduction half: 2H^++2e^-\rightarrow H_2

8 0
3 years ago
Galena, the most common mineral of lead is primarily lead(II) sulfide (PbS). The first step in the production of pure lead is to
topjm [15]

Answer:

PbSO₃(s)⟶PbO(s)+SO₂(g)

Explanation:

In order for an equation to be balanced, both <em>the charges</em> and <em>the masses </em>need to be the same in both sides of the equation.

In the case of the reaction PbSO₃(s)⟶PbO(s) +SO₂(g), there are no charges in either side, so it is already electronically balanced.

Regarding masses, let's see each element one by one:

Pb ⇒ There's 1 Pb in both sides already.

S ⇒ There's 1 S in both sides already.

O ⇒ There're 3 O in both sides already.

So the equation is balanced as is.

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