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3 years ago

Which of the following is the best description of natural selection?

1 answer:

3 0

The definition of natural selection is: the process by which organisms best suited to their environment are able to survive and produce more offspring.
I would go with over production of offspring for the answer.

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Please help ASAP PLEASE

Delicious77 [7]

Number one may be electrons, protons, and neutrons.
number two may be protons and neutrons.

7 0

3 years ago

Organic compounds and their uses

Leviafan [203]

Organic compounds essential to human functioning include carbohydrates, lipids, proteins, and nucleotides. These compounds are said to be organic because they contain both carbon and hydrogen

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2 years ago

How many valence electrons does K+ have

Lera25 [3.4K]

Answer:

About one valence electron

Explanation:

Obviously, removing that electron gives us [Ar] (same configuration as K1+), which is a noble gas and has 8 electrons. Valence electrons are generally regarded as being 'the outermost electrons' for a given atom. Therefore, with neutral potassium, there is one valence electron

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3 years ago

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hello frds need help (＠_＠;) The lower end of thistle funnel should be dipped in solution why Give reason .I will give brainlest

snow_tiger [21]

Answer:

The end of the thistle funnel should be dipped under acid to prevent the escape of gas from the thistle funnel.

Explanation:

hiii everyone

8 0

3 years ago

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A 46.9 gram sample of a substance has a volume of about 3.5 centimeters3. It is solid at a room temperature of 23ºC. Out of the

horrorfan [7]

Answer : (C) Hafnium is the most likely identity of the given substance.

Solution : Given,

Mass of given substance (m) = 46.9 g

Volume of given substance (V) = 3.5 $Cm^{3}$

First, find the Density of given substance.

Formula used :

$Density=\frac{\text{Mass of given substance}}{\text{Voume of given substance}}$

Now,put all the values in this formula, we get

$Density=\frac{46.9 g}{3.5 Cm^{3} }$ = 13.4 g/ $Cm^{3}$

So, we conclude that the density of given substance (13.4 g/ $Cm^{3}$ ) is approximately equal to the density of Mercury and Hafnium (13.53 and 13.31 g/ $Cm^{3}$ respectively).

According to the question the substance is solid at room temperature but Mercury is liquid at room temperature. So, Mercury is not identical to the given substance.

Another element i.e, Hafnium is the element whose density is approximately equal to the given substance and also solid at room temperature. And we know that the melting point of solid is high.

So, Hafnium is the most likely element which is the identity of the given substance.

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3 years ago

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