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Stella [2.4K]
3 years ago
14

When the following equation is balanced, the coefficient of Al is ___ Al (s) + H20 (1) - Al(OH)3 (s) + H2 (g) A) 4 B) 1 C) 5 D)

3 E) 2
Chemistry
1 answer:
Salsk061 [2.6K]3 years ago
7 0

<u>Answer:</u> The correct answer is Option E.

<u>Explanation:</u>

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.  

This also means that total mass on the reactant side must be equal to the total mass on the product side.

The balanced chemical equation for the reaction of aluminium and water follows:

2Al(s)+6H_2O(l)\rightarrow 2Al(OH)_3(s)+3H_2(g)

The coefficient of Aluminium is 2.

Hence, the correct answer is Option E.

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The balanced equation for the above reaction is as follows;
2HCl + K₂SO₃ ---> 2KCl + H₂O + SO₂
stoichiometry of HCl to SO₂ is 2:1
number of moles of HCl reacted - 15.0 g / 36.5 g/mol = 0.411 mol 
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number of SO₂ moles formed - 0.411 mol /2 = 0.206 mol
since we know the number of moles we can find volume using ideal gas law equation 
PV = nRT
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substituting values in the equation 

136 789 Pa x V = 0.206 mol x 8.314 Jmol⁻¹K⁻¹ x 325 K 
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4 years ago
Pretend you are an uncooked egg; now describe what happened to you when you were placed in a pot of boiling water. Be sure to in
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Answer:

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