Explain how a gene pool and biological evolution are related

Answers

Answer 1

Answer:

The ones that are able to survive pass on their genes to the next generation. Bye doing that they pass on certain traits to the next generation causing them to inherit those traits and develop new ones and that prosses repeats for thousands and millions of years and that's how they are able to evolve.

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If Ca is the new standard of atomic mass and is assigned a value of 50.00 amu, what is the molar mass of Aluminium Acetate using this standard?How does one solve this?

Answers

Answer:

848.1 g/mol

Explanation:

Data given:

Standard of atomic mass of Ca = 50 amu

molar mass of Aluminium Acetate = ?

Solution:

Relative atomic mass represented by Ar. It is ratio of actual mass with respect to the 1/12th mass of C-12 but here Ca-50 is standard.

Formula of Aluminium Acetate = Al(CH₃COO)₃

In order to calculate Ar

first we will calculate 1/50 of Ca

As we know

mass of 1/12 of C-12 = 1.993 x 10⁻²⁶/12 = 1.661 x 10⁻²⁷ Kg

So, for Ca-50

mass of 1/50 of Ca-50 = 1.993 x 10⁻²⁶/50 = 3.986 x 10⁻²⁸ Kg

Now

Relative Atomic mass for element X = rest mass of "X"/ 3.986 x 10⁻²⁸ Kg . . . . . . (1)

First we have to know the relative atomic masses of Aluminium, carbon, hydrogen, oxygen atoms involve in Aluminium Acetate formula with respect to new standard Ca-50

By using equation-1 we can calculate Ar for which we have reported rest masses of atoms as below

Rest mass of Aluminium = 4.48 x 10⁻²⁶ Kg

Rest mass of carbon = 1.993 x 10⁻²⁶ Kg

Rest mass of hydrogen = 1.608 x 10⁻²⁷ Kg

Rest mass of oxygen = 2.657x10⁻²⁶ Kg

Now put values in equation 1 for each atom

Ar for Aluminium= 4.48 x 10⁻²⁶Kg / 3.986 x 10⁻²⁸ Kg

Ar for Aluminium = 112.5 amu

Ar for Carbon= 1.993 x 10⁻²⁶ Kg / 3.986 x 10⁻²⁸ Kg

Ar for Carbon= 50 amu

Ar for Hydrogen = 1.608 x 10⁻²⁷ Kg / 3.986 x 10⁻²⁸ Kg

Ar for hydrogen = 4 amu

Ar for Oxygen = 2.657x10⁻²⁶ Kg / 3.986 x 10⁻²⁸ Kg

Ar for Oxygen = 66.6 amu

Now find the molar mass ofAl(CH₃COO)₃

molar mass of Aluminium Acetate = Al(CH₃COO)₃

Al(CH₃COO)₃ = 112.5 + 3 (50 + 3(4) + 50 + 66.6 +66.6)

Al(CH₃COO)₃ = 112.5 + 3 (50 + 12 + 50 + 66.6 +66.6)

Al(CH₃COO)₃ = 112.5 + 3 (245.2)

Al(CH₃COO)₃ = 112.5 + 735.6

Al(CH₃COO)₃ = 848.1 g/mol

molar mass of Aluminium Acetate = 848.1 g/mol

One piece of evidence that a chemical reaction occurs when baking soda is added to vinegar

Answers

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Answers

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Mr. Greenjeans wants to know which fertilizer helps grow the biggest pumpkins. He plants three pumpkin seeds of the same variety and then uses three different types of fertilizer on the three seeds. The seeds receive the same amount of fertilizer, water and sunlight. Mr. Greenjeans monitors the pumpkin seeds' growth for three months. How could Mr. Greenjeans improve his experiment?
A) Mr. Greenjeans needs a control group for comparison.
B) Mr. Greenjeans should use corn and radish seeds as a comparison.
C) Mr. Greenjeans should use three different types of pumpkin seeds.
D) Mr. Greenjeans probably should monitor the pumpkins for a longer period of time.

Answers

A)Mr.Greenjeans needs a control group for comparison.
hope this helps

Mr. Greenjeans needs a control group for comparison.

How do we know that the fertilizer had any impact on growth since Mr. Greenjeans has no control group for comparison? He must know how the pumpkins will grow without any fertilizer as well. The control group gives us a way to compare the experimental groups to help form more valid conclusions.

Whats is a chemical change of a paper bag

Answers

Burning it. That causes a chemical reaction.

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This is because the carbon compounds are being oxidized into carbon dioxide and water vapour (or h2o, same thing).

What is the name given to the property of metal that allows electricity to pass through.

Answers

That would be "conductivity". All substances have some measurable amount it, but metals have by far the most.

What is the name given to the property of metal that allows electricity to pass through ?

Answer : conductivity

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