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Ugo [173]
2 years ago
9

Which of Earth's spheres consists of all living things? (1 point)

Chemistry
1 answer:
vodka [1.7K]2 years ago
3 0

Answer:

atmosphere

Explanation:

because oxygen is retained in the atmosphere

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Helppp plzzz will give brainlist
Maslowich
4. A
because PbCl2 is an ionic compound and it's solid, so it's a substance.
It cannot be mixture, because it's a pure molecule.
5. D
despite that both substances are gases, colorless they are different molecules, so they should have different either chemical and physical properties
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this substance made from W atoms and others are made from molecules
5 0
2 years ago
Which form of energy does a cheeseburger have
pishuonlain [190]

Answer:

chemical potential energy - It mainly has chemical potential energy, this is really a type of electrical potential energy stored in the chemical bonds of the molecules

Explanation:

You can give the other person brainliest, I don't need it! :)

7 0
3 years ago
What is the minimum pressure in kPa that must be applied at 25 °C to obtain pure water by reverse osmosis from water that is 0.1
Yuri [45]

Answer:

The minimum pressure should be 901.79 kPa

Explanation:

<u>Step 1: </u>Data given

Temperature = 25°C

Molarity of sodium chloride = 0.163 M

Molarity of magnesium sulfate = 0.019 M

<u>Step 2:</u> Calculate osmotic pressure

The formula for the osmotic pressure =

Π=MRT.

⇒ with M = the total molarity of all of the particles in the solution.

 ⇒ R = gas constant = 0.08206 L*atm/K*mol

⇒ T = the temperature = 25 °C = 298 K

NaCl→ Na+ + Cl-

MgSO4 → Mg^2+ + SO4^2-

M = 2(0.163) + 2(0.019 M)

M = 0.364 M

Π = (0.364 M)(0.08206 atm-L/mol-K)(25 + 273 K)

Π = 8.90 atm

(8.90 atm)(101.325 kPa/atm) = 901.79 kPa

The minimum pressure should be 901.79 kPa

6 0
3 years ago
Which element has the highest 2nd ionization energy? <br> A. Be <br> B. C<br> C. Li<br> D. B
dlinn [17]

Answer:

The answer is c.........

6 0
2 years ago
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So I have an F in science, and everything is due today. Am I going to fail 9th grade because I didn't pass that class?
Elis [28]

Answer:

i dk how ur school works, but you'll most likely have to take that science again to get the credits u need to graduate

Explanation:

3 0
3 years ago
Read 2 more answers
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