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olga nikolaevna [1]

3 years ago

9

Help asap please will give branliest

1 answer:

NARA [144]3 years ago

4 0

Answer:

I think its ethanol based on what I've learned

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How does a balanced chemical equation verify the law of conservation of matter?

murzikaleks [220]

Answer:

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How does a balanced chemical equation verify the law of conservation of matter?

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According to the Law conservation of matter

Mass can neither be created nor destroyed in a chemical reaction. That is, the total mass of the elements present in the products of a chemical reaction has to be equal to the total mass of the elements present in the reactants. In other words, the number of atoms of each element remains the same, before and after a chemical reaction. Hence, we need to balance the skeletal chemical equation.

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3 years ago

What is the number of neutrons in Hydrogen, O (A= 1, Z= 1)?

Vilka [71]

Answer:

Explanation:

Hydrogen has 1 proton and one nuetron

Oxygen has 8 protons nad 8 neutrons

5 0

3 years ago

B) A company president would like to offer a 4.00 L cylinder containing 500 g of chlorine in the new catalog. The cylinders you

Yuri [45]

Answer:

43.1atm is the pressure using gas law and 27.2atm using Van der Waals Law.

Explanation:

Ideal gas law is:

PV = nRT

<em>Where P is pressure in atm</em>

<em>V is volume = 4.00L</em>

<em>n are moles of the gas (For chlorine Molar Mass: 70.90g/mol):</em>

<em>500g * (1mol / 70.90g) = 7.052 moles</em>

<em>R is gas constant = 0.082atmL/molK</em>

<em>T is absolute temperature = 25°C + 273 = 298K</em>

To solve the pressure, P:

P = nRT/V

P = 7.052mol*0.082atmL/molK*298K / 4.00L

P = 43.1atm is the pressure using gas law.

Van der Waals equation is:

$P + a(\frac{n}{V})^2 * (V-nb) = nRT$

<em>Where a is 6.58L²atm*mol⁻²</em>

<em>b = 0.056Lmol⁻²</em>

Solving for pressure:

$P + a(\frac{n}{V})^2 = \frac{nRT}{(V-nb)}$

$P = \frac{nRT}{(V-nb)}-a(\frac{n}{V})^2$

$P = \frac{7.052mol*0.082atmL/molK*298K}{(4.00L-7.052mol*0.056L*mol)}-6.58L^2mol^{-2}(\frac{7.052mol}{4.00L})^2$

P = 172.323 / 3.6051 - 20.4866

P = 27.2atm using Van der Waals Law

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3 years ago

How many molecules of C 2H 5Br will be present if you had 4.52 g of this compound?

Reptile [31]

Okay ty what what happened to me lol lolhope this helps i lol lol oh yeah that’s okay lol lol yeah lol lol !!! hope it helps :)

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3 years ago

Describe how the amount of air changes as you travel up through Earth's atmosphere

pogonyaev

As you travel up the air pressure decrease, so then the amount of oxygen you use to breathe also decreases

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3 years ago

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