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Galina-37 [17]
2 years ago
15

In the equation, 2Al (s) + 3Cl2 (g) → 2AlCl3 (s), the large number “3” in front of the Cl2 indicates:

Chemistry
2 answers:
Sophie [7]2 years ago
6 0

<u>Answer:</u> The correct answer is the number of moles of chlorine molecules needed to balance the equation.

<u>Explanation:</u>

A balanced chemical equation follows law of conservation of mass.

This law states that mass on either side of the reaction remains constant. Also, mass can neither be created, nor be destroyed, but it can only be transformed from one form to another form.

In the given chemical equation:

2Al(s)+3Cl_2(g)\rightarrow 2AlCl_3(s)

The numbers '2', '3' and '2' represents the number of moles of the specie required to balance a chemical equation.

Here, Cl_2 is a molecule of 2 chlorine atoms.

Hence, the correct answer is the number of moles of chlorine molecules needed to balance the equation.

dybincka [34]2 years ago
5 0

In the equation,

2Al(s) + 3Cl2(g) —> 2AlCl3(s),

the large number "3" in front of Cl2 indicates the the number of moles of Chlorine molecules needed to balance the equation.

Hope this will help you. 

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3 years ago
For the following reactions, write a balanced equation using half-reactions and calculate the voltage to be expected.
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a) 2Na(s) +2H_2O(I)→ 2Na^+(aq) + OH^-(aq)+ H_2(g)

b) 2Ag (s) +2H^(aq) → 2 Ag^+ (aq) +H_2(g)

<h3>What are half-reactions?</h3>

The half-reaction method is a way to balance redox reactions. It involves breaking the overall equation down into an oxidation part and a reduction part.

a)

2Na(s) +2H_2O(I)→ 2Na^+(aq) + OH^-(aq)+ H_2(g)

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8 0
2 years ago
An object with a mass of 3.2kg has a force of 16.3 newtons to the right and 6.7 newtons to the left applied to it. What is the r
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Answer:

3m/s²

Explanation:

Given parameters:

Mass of object  = 3.2kg

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Force to the left  = 6.7N

Unknown:

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To solve this problem, we use newtons second law of motion;

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         9.6  = 3.2 x a

              a = \frac{9.6}{3.2}   = 3m/s²

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