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marta [7]
2 years ago
12

K12 how the gene works unit test answer

Chemistry
1 answer:
77julia77 [94]2 years ago
3 0

Answer:

genes are small sections of DNA. These genes contain instructions that tell your cells to make molecules called proteins. And the protein do things to your body to keep you healthy. Genes determine traits as well.

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This is very difficult
Oliga [24]

Answer: C

Explanation:

6 0
3 years ago
Consider separate samples of water and carbon dioxide, each with the same mass. Which contains the greater number of molecules?
Ahat [919]

Answer: The sample that contains the greater number of molecules is water.

Explanation: To calculate the number of molecules, it is used the Avogadro's number ( 6.02*10^{23} particles/molecules). So, considering that the mass to water and carbon dioxide is 1g (it can be any other number), the relationship between moles and molar weight is:

moles =\frac{mass}{molar weight}

To water: moles = \frac{1g}{18 g/mol} = 0.05 moles.

Therefore,

1 mol ---- 6.02*10^{23} molecules

0.05 moles ---- x

x = 0.30*10^{23} molecules of water.

To carbon dioxide: moles = \frac{1g}{44 g/mol} = 0.02 moles.

Therefore,

1 mol ---- 6.02*10^{23} molecules

0.02 moles ---- y

y = 0.12*10^{23} molecules of carbon dioxide.

7 0
3 years ago
What structural feature of lecithin allows it to behave like an emulsifying agent?
stepladder [879]
Lecithin is an emulsifier agent that's composed of 5 smaller molecules: phosphoric acid, choline, glycerol( is the backbone), and two fatty acids. 

The fatty acids, which are hydrophobic (afraid of water), makes this substance more similiar to fats and represent the non-polar part of the lecithin.
The phosphate group is the polar portion of the molecule and it's the negatively charged. The choline is positively charged, which readily dissolve in water<span>.

</span><span>Lecithin is a good emulsifier because of these structural features. the hydrophobic contacts with the oil, while the hydrophilic end contacts with the water.</span>

6 0
3 years ago
500.-liter volume of helium gas is at a pressure of 450 mmHg and has a temperature of 300.K. What is the volume of the same gas
STALIN [3.7K]

Answer:648

Explanation:648

5 0
3 years ago
To dissolve in water, aluminum (Al) should form a compound with
nadezda [96]
To dissolve in water, aluminum (Al) should form a compound with sulfate. Aluminum sulfate is the water soluble compound of aluminum. It has a chemical formula of Al2(SO4)3. It is used in industries as flocculating agent especially in the purification steps of drinking water and wastewater treatment plants.
3 0
3 years ago
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