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zysi [14]
3 years ago
5

Would you rather travel back in time to learn about your future or learn past life lesson to understand your lifestyle?

Chemistry
1 answer:
olya-2409 [2.1K]3 years ago
5 0
Learn about my future.
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What is the volume in liters of hydrogen gas that would be produced by the reaction of 40.0 g of Al with excess HCl at STP accor
DaniilM [7]

The volume in liters of Hydrogen gas = 49.28 L

<h3>Further explanation </h3>

The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Reaction

2 Al (s) + 6 HCl (aq) → 2 AlCl₃ (aq) + 3 H₂ (g)

mol Al :

\tt mol=\dfrac{mass}{Ar}=\dfrac{40}{27}=1.481

mol  H₂ :

\tt \dfrac{3}{2}\times 1.481=2.2

At STP, 1 mol =22.4 L

so the volume of hydrogen :

\tt 2.2 \times 22.4=49.28~L

8 0
3 years ago
Read 2 more answers
According to the following reaction, how many moles of oxygen gas are necessary to form 0.408 moles carbon dioxide?
Neporo4naja [7]

Answer:

2 molecules of oxygen are necessary

3 0
2 years ago
In H2O, the 2 is called a
GaryK [48]
2 hydrogen atoms hope this helps
6 0
3 years ago
Once the following equation is balanced with the smallest set of whole number coefficients, what is the sum of the coefficients?
katrin [286]

Answer:

9

Explanation:

To balance the equation, we need to supply the number of missing coefficients.

There are 2 moles of aluminium on the right hand side, so automatically we need to multiply the number of moles of aluminium by 2 on the left hand side.

There are 3 sulphate ions on the right hand side so we need to multiply the number on the left by 3.

And lastly since we have 6 hydrogen molecules on the left hand side now, we need to multiply the hydrogen on the right hand side by 3 to give 6

The set of coefficients = 2 3 1 3

Adding all thus yields 9

7 0
3 years ago
In the reaction
Sedbober [7]

Answer:

rate = [NO]²[O2]

Explanation:

The rate law for the reaction:

2 NO(g) + O2(g) → 2 NO2(g)

Is expressed in terms of reactants as follows:

rate = [NO]ⁿ[O2]ˣ

<em>Where n and x are the coefficients of the rate law.</em>

<em />

If [NO] is doubled, the rate increased 4 times. That is only possible if:

rate = [NO]²[O2]ˣ

Now, as [NO] is doubled and increased the rate 4 times, and [NO] + [O2] when doubled increased the rate 8 times, doubled [O2] implies increased the rate 2 times. That is only possible is:

<h3>rate = [NO]²[O2]</h3>
7 0
3 years ago
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