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3 years ago

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What is the partial pressure of hydrogen gas in a mixture of hydrogen Nitrogen, and helium if the total pressure is 700 partial

pressure is 155 mmHg, and the partial pressure of nitrogen is 265 mmHg?

1 answer:

NARA [144]3 years ago

5 0

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Scientific experiments must be able to be repeated by multiple scientists to verify the results that are obtained. Which of the

solmaris [256]

Hi,

You didn't mention what "the following" were - please add additional information so the problem can be solved.

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3 years ago

1. How many calcium atoms are in 8CaOH?

Vedmedyk [2.9K]

Answer:

8

Explanation:

the number before the abbrviation for calcium (Ca) shows how many calcium there is.

6 0

3 years ago

Read 2 more answers

Why does sodium have a lower melting point then magnesium

Lady bird [3.3K]

Answer:

Number of delocalized electrons

Explanation:

Magnesium has more delocalized electrons compared to sodium and this accounts for the higher melting point.

When magnesium atoms comes together to form a metallic bonds, they have more network of delocalized electrons.
There is more pull for the localized electrons due to the nuclear charge on the nucleus.
This strong intermolecular metallic bond increases the melting point of magnesium.

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3 years ago

Consider the reaction: A (aq) ⇌ B (aq) at 253 K where the initial concentration of A = 1.00 M and the initial concentration of B

Ugo [173]

Answer:

The maximum amount of work that can be done by this system is -2.71 kJ/mol

Explanation:

Maximum amount of work denoted change in gibbs free energy $(\Delta G)$ during the reaction.

Equilibrium concentration of B = 0.357 M

So equilibrium concentration of A = (1-0.357) M = 0.643 M

So equilibrium constant at 253 K, $K_{eq}= \frac{[B]}{[A]}$

[A] and [B] represent equilibrium concentrations

$K_{eq}=\frac{0.357}{0.643}=0.555$

When concentration of A = 0.867 M then B = (1-0.867) M = 0.133 M

So reaction quotient at this situation, $Q=\frac{0.133}{0.867}=0.153$

We know, $\Delta G=RTln(\frac{Q}{K_{eq}})$

where R is gas constant and T is temperature in kelvin

Here R is 8.314 J/(mol.K), T is 253 K, Q is 0.153 and $K_{eq}$ is 0.555

So, $\Delta G=8.314\times 253\times ln(\frac{0.153}{0.555})mol/K$

= -2710 J/mol

= -2.71 kJ/mol

4 0

3 years ago

The distance between the nucleus and the valence shell

solong [7]

Answer:

he atomic size of an atom, also called the atomic radius, refers to the distance between an atom's nucleus and its valence electrons. Remember, the closer an electron is to the nucleus, the lower its energy and the more tightly it is held

Explanation:

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3 years ago