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stellarik [79]
3 years ago
7

2. Which is an abiotic factor?

Chemistry
2 answers:
wariber [46]3 years ago
7 0
A should be your answer.

Sunlight is abiotic and not living.
The rest still contains biological life.

Have an awesome day! :)

From your friendly Helper-in-Training, collinjun0827
Anna11 [10]3 years ago
5 0
Yes I would say it is A
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2. If 5.4 g Al are reacted with excess HCI, how many moles of H2 will be produced?
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Answer:

0.3 moles of H2 will be produced.

Explanation:

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Given Al mass = 5.4 g, we know Mr of Al is 27

Using the formula:

moles = mass / Mr

moles of Al = 5.4 / 27

moles of Al = 0.2 moles

Here we see that "2" molar mass before Al; so in this reaction, "1" molar mass will have [(0.2)/2] = 0.1 moles. He see "3" molar mass before H2, therefore moles of H2 is (3 * 0.1) = 0.3 moles.

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2 years ago
Sodium sulfate dissolves as follows: Na2SO4(s) → 2Na+(aq) + SO42- (aq). How many moles of Na2SO4 are required to make 1.0 L of s
maxonik [38]

<u>Answer:</u> The number of moles of Na_2SO_4 is 0.05 moles.

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}

We are given:

Molarity of solution = 0.10 mol/L

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Putting values in above equation, we get:

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By Stoichiometry of the reaction:

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Hello! Your answer will be C. If you need an explanation let me know!
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