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fomenos
2 years ago
11

The water cycle, photosynthesis, nutrient cycling, and soil formation are examples of:

Chemistry
1 answer:
mixas84 [53]2 years ago
8 0

It seems like the answer would be supporting services.

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Which type of molecule is shown below?
denis-greek [22]
The answer is A. It is an alkyn. There is a triple bond
3 0
3 years ago
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Proposing an explanation for the changing colors of the sky is an example of a(n)
lara [203]

Answer : Hypothesis.

Explanation : Hypothesis is defined as the supposition or proposed explanation which can be made on the basis of limited available evidence as a starting point for further investigation. Here, in this question the proposed explanation for the changing colors of the sky is an example of a hypothesis.

A hypothesis has to be supported with scientific experiments which are reproducible by several experiments and test results have to be valid to be called as a scientific theory.

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3 years ago
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When balancing redox reactions under basic conditions in aqueous solution, the first step is to:________.
natta225 [31]

Answer:

When balancing redox reactions under basic conditions in aqueous solution, the first step is to balance oxygen.

Explanation:

Oxidation-reduction reactions or redox reactions are those in which an electron transfer occurs between the reagents. An electron transfer implies that there is a change in the number of oxidation between the reagents and the products.

The gain of electrons is called reduction and the loss of electrons oxidation. That is to say, there is oxidation whenever an atom or group of atoms loses electrons (or increases its positive charges) and in the reduction an atom or group of atoms gains electrons, increasing its negative charges or decreasing the positive ones.

The oxidation and reduction half-reactions, in a basic medium, adjust the oxygens and hydrogens as follows:

In the member of the half-reaction that presents excess oxygen, you add as many water molecules as there are too many oxygen. Then, in the opposite member, the necessary hydroxyl ions are added to fully adjust the half-reaction. Normally, twice as many hydroxyl ions, OH-, are required as water molecules have previously been added.

In short, you first adjust the oxygens with OH-, then you adjust the H with H₂O, and finally you adjust the charge with e-

So, <u><em>when balancing redox reactions under basic conditions in aqueous solution, the first step is to balance oxygen.</em></u>

3 0
3 years ago
How many molecules of ammonia are contained in 10.4 moles of ammonia, NH3?
Crank

Answer:

The answer is "\bold{6.26 \times 10^{24} \ molecules \ NH_3}\\\\"

Explanation:

1-mole molecules as per Avogadro number= 6.02 \times 10^{23} \ molecules\\\\

1-mole NH_3 \to 6.02 \times 10^{23} \ molecules\\\\

10.4 \ moles \ of \ \ NH_3 :

\to \frac{ 6.02 \times 10^{23} \ molecules }{ 1 \ mole\ NH_3}  \times 10.4 \ mole \ NH_3\\\\ \to 6.02 \times 10^{23} \ molecules   \times 10.4\\\\\to 62.608 \times 10^{23} \ molecules \\\\\to 6.26 \times 10^{24} \ molecules \ NH_3\\\\

6 0
2 years ago
An electron has _____.
vichka [17]
Electrons have a mass of 1/1836
Hope that helps you!
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2 years ago
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