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Semenov [28]
3 years ago
12

Which elements are the most abundant in living organisms? Select all that apply.

Chemistry
1 answer:
Nonamiya [84]3 years ago
4 0

Answer:

batata

Explanation:)

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Which of the following statements is true?
AveGali [126]

All of the statements are true

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2 years ago
Uranium atoms each have 92 protons. How many protons does each U-238 atom have?
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A.92 all Uranium atoms contain the same amount of protons

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3 years ago
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At what temperature will 0.654 moles of helium gas occupy 12.30 liters at 1.95 atmospheres?
DedPeter [7]

Answer:

447,25k

Explanation:

According to the ideal gas law

PV=nRT

Where:

P: is the pressure of the gas in atmospheres.

V: is the volume of the gas in liters.

n: number of moles of the gas

R: ideal gas constant

T: absolute temperature of the gas in kelvin

now using:

T=\frac{PV}{nR}\\ \\T=\frac{12,3L.1,95atm}{0,654mol.0,082(L.atm/K.mol)}\\ \\T=447,25K

3 0
3 years ago
What are the evidences for suspecting the presence of waves?
Vsevolod [243]

Answer:

Well,

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5 0
3 years ago
A researcher wants to test the solubility (property of being dissolved) of salt in water as the temperature of the water increas
Leya [2.2K]
The researcher may first weight the beaker with water and then start to heat the water to a constant temperature, for example 30 °C and then start adding salt and stirring. He should add salt slowly until solid salt starts to become visible and the solution starts becoming cloudy. When this happens, he should quickly weigh the beaker. The increase in mass is the mass of salt dissolved at that temperature.
The procedure is then repeated but at an increased temperature until 5-6 temperatures have been tested.
3 0
3 years ago
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