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Svetlanka [38]
3 years ago
12

Please Help 20 points+ Brainliest

Chemistry
1 answer:
Alexeev081 [22]3 years ago
7 0
I think A I'm sorry if I'm wrong I hope I'm right :)

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Please check this for me?
kolbaska11 [484]
The answer is 
<span>2PbS(s) + 3O2(g) = 2PbO(s) + 2SO2(g)

Your answer is not yet balanced because you have 3 oxygen atoms. it should be balanced by multiplying both side by 2 such as the balanced equation I made. To check it, I will explain why your answer is not yet balanced.

check: (from your equation)
</span> 1-Pb-1
 1-S-1
2 -O-3
the difference between the reactant and the product of Oxygen will prove that it is not yet balanced.

If you use 2PbS(s) + 3O2(g) = 2PbO(s) + 2SO2(g), to check it:
2-Pb-2
 2-S-2
6 -O-6
then this is now balance
6 0
3 years ago
Select all the correct answers.
stich3 [128]

Answer : The products of the acid-base reaction between HClO_3 and LiOH are, LiClO_3 and H_2O

Explanation :

Neutralization reaction : It is a type of chemical reaction in which an acid react with a base to give salt and water as a product that means it reacts to give a neutral solution.  It is also known as acid-base reaction.

The acid-base reaction will be:

HClO_3+LiOH\rightarrow LiClO_3+H_2O

Therefore, the products of the acid-base reaction between HClO_3 and LiOH are, LiClO_3 and H_2O

6 0
3 years ago
Read 2 more answers
Which represents the correct equilibrium constant expression for the reaction below?
zubka84 [21]
K(eq) = concentration of products/concentration of reactant
         = [Cu+2] / [Ag+]^2 

Activity of pure solid and liquid is taken as 1.

Hence last option is correct.

Hope this helps, have a great day ahead!

6 0
3 years ago
Read 2 more answers
The elements in alkali metal and halogen groups of the periodic table are the most reactive since they only need to gain or lose
Anarel [89]
<h3>Answer:</h3>

Reactivity increases because the valence level is further from the nucleus of an atom.

<h3>Explanation:</h3>
  • The reactivity of elements in the periodic table depends on the position of the element in the periodic table.
  • The trend in the reactivity across the period and down the group depends on whether one is dealing with metallic elements or non-metallic elements.
  • Reactivity of metals such as alkali metals and alkali-earth metals increases down the group as the number of energy levels increases making valence electrons to be further from the nucleus.
  • Reactivity of non-metallic groups such as halogen decreases down the group as energy levels increase which reduces the nuclear attraction of the valence electrons to the nucleus.

4 0
3 years ago
2NaOH + H2SO4 --&gt; Na2SO4 + 2H2O
iren2701 [21]

Answer:

Sodium hydroxide, a base, reacts with sulfuric acid to form sodium sulfate (complete neutralization) and water.  If you write the balanced equation, you will see that 2 moles of sodium hydroxide react with 1 mole of sulfuric acid to form 1 mole of sodium sulfate and 2 moles of water.  Therefore it would take .25 moles of sulfuric acid to react with .5 moles of sodium hydroxide.

Explanation:

4 0
3 years ago
Read 2 more answers
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