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OLga [1]
2 years ago
12

Why aren’t dominant genes ALWAYS more common?

Chemistry
1 answer:
Zolol [24]2 years ago
5 0

Answer:

selective breeding

Explanation:

Example:  pretend that rabbits can only be brown or black and black is dominant. If only the brown rabbits reproduce it will eventually be more common    Hope this helps

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Urea, (NH2)2CO, is a product of metabolism of proteins. An aqueous solution is 37.2% urea by mass and has a density of 1.032 g/m
Feliz [49]

Answer:

The molarity of urea in this solution is 6.39 M.

Explanation:

Molarity (M) is <em>the number of moles of solute in 1 L of solution</em>;  that is

molarity = moles of solute ÷ liters of solution

To calculate the molality, we need to know the number of moles of urea and the volume of solution in liters. We assume 100 grams of solution.

Our first step is to calculate the moles of urea in 100 grams of the solution,

using the molar mass a conversion factor. The total moles of 100g of a 37.2 percent by mass solution is

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Now we need to calculate the volume of 100 grams of solution, and we use density as a conversion factor.

1.032 g/mL ÷ 100 g = 96.9 mL

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0.619 mol/96.9 mL × 1000 mL= 6.39 M

Therefore, the molarity of the solution is 6.39 M.

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3 years ago
What physical property of mercury makes it well suited for use in a thermometer?
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Answer:

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Explanation:

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If something has an actual yield of 2.5 grams and a theoretical yield of 7.5 grams, what is the percent yield?
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How many electrons would a neutral atom of nitrogen need to gain in order to have a full valence electrons shell
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