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Simora [160]
3 years ago
6

2.

Chemistry
1 answer:
zlopas [31]3 years ago
7 0

Answer:

A. modern organisms closely resembling fossils

Explanation:

Fossils are defined as the preserved remains or traces of living organisms from past.

Fossils are considered as an evidence for evolution because they represent the existence of life on earth and shows the difference between the life in past that life on earth today. With the help of fossil, it is easy to determine the age of fossils which further help to determine that how modern organisms have evolved from the past.

Hence, the correct answer is "A. modern organisms closely resembling fossils".

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Flauer [41]
1. The world without boron would be like a "turtle hiding inside it's shell" Almost everything that we need biologically would not be supplied. There would be plant disorder because of lack of boron that is needed for plants growth. And it would be widespread around the world and causes large of scarcity of food production resulting to chain of reaction to other factors that is part of our daily lives. We are not that high-tech as now and the transition of technology would not be as what we would be expecting in the years to come. We may obtain some of it naturally but it would not be enough later on as the population keeps on growing.

2. Life is still life because we still have other resources we need but it would be quite different as Boron plays a vital role since the earth's formation. As it has many uses in the beginning of civilization as we relies on borates for almost everything. Probably, widespread of plant disorder, poor production of food, rampant of sickness may happen, increasing of pestilence that some of the key ingredient of household products relies on it. 
5 0
3 years ago
A bond based on intermolecular forces between hydrogen and fluorine, nitrogen, or oxygen is a _____.
Anuta_ua [19.1K]
Hydrogen Bond is the bond based on intermolecular forces between H and F O and N
7 0
4 years ago
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How many carbon atoms are there in 1.00 mol of C2H6?
Sphinxa [80]
Since it's C2, then it must be two Carbon atoms. Think of it this way; there are two atoms of Hydrogen in a water molecule, so we now have H2O.
5 0
4 years ago
14.2 grams of Na2 so4 is dissolved in water to make a 2.50 L solution.What is molarity of solution?
FrozenT [24]

Answer:

The answer to your question is 0.04 M

Explanation:

Data

mass of Na₂SO₄ = 14.2 g

volume = 2.50 l

Molarity = ?

Process

1.- Calculate the molar mass of Na₂SO₄

Na₂SO₄ = (23 x 2) + (32 x 1) + (16 x 4) = 46 + 32 + 64 = 142 g

2.- Calculate the number of moles of Na₂SO₄

                    142 g of Na₂SO₄ ------------------- 1 mol

                     14.2 g of Na₂SO₄ ------------------  x

                                   x = (14.2 x 1) / 142

                                   x = 0.1 moles

3.- Calculate the molarity

Molarity = moles /volume

-Substitution

Molarity = 0.1 / 2.5

-Result

Molarity = 0.04

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3 years ago
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The answer is solvent
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3 years ago
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