What is the valence shell?

Chemistry

1 answer:

Afina-wow [57]4 years ago

5 0

The valence shell of an atom is the outermost shell of electrons.

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the system absorbs 34.7 j from the surroundings in form of heat as it increases its volume to 12.80 l under an external pressure

OleMash [197]

The initial volume of the gas is obtained as 11.02 L.

<h3>What is the initial volume?</h3>

The work done can be obtained from the use of the formula;

W = PΔV

W = work done on the gas

P = pressure of the gas

ΔV = Change in volume

Now we can see that;

Internal energy = 127.5 J or 1.26 Latm

Heat lost = 34.7 J or 0.34 Latm

We now have;

-1.26 = 0.34 - 0.900(12.80 - V1)

-1.26 = 0.34 - 11.52 + 0.9V1

-1.26 + 11.18 = 0.9V1

V1 = -1.26 + 11.18 / 0.9

V1 = 11.02 L

Learn more about work done:brainly.com/question/13031096

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1 year ago

What is the molar mass of Ca(CIO4)2? (3 points)<br> 239.0 g/mol

wariber [46]

239.0 g/mol

Add the mass of each individual atom

8 0

3 years ago

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What is the Bohr model for Sodium?

Sonbull [250]

Column tells you how many valence electrons there are

Row tells you how many layers (circles)

Sodium (Na) has 1 valence electron

Sodium (Na) is the 3rd row so there's 3 circles

Has 11 total electrons

Bohr models show ALL ELECTRONS

The first shell can only hold 2 electrons

Every shell after that can hold 8.

So the first shell has 2 electrons, second one has 8 electrons, and the third one has 1.

2 + 8 + 1 = 11

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3 years ago

Urgent plzz help meeee thx I HAVE EXAMEEE

USPshnik [31]

Answer: $2Ag^{+}(aq)+CO_3^{2-}(aq)\rightarrow Ag_2CO_3(s)$

Explanation:

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The given chemical equation is:

$2AgF(aq)+Na_2CO_3(aq)\rightarrow Ag_2CO_3(s)+2NaF(aq)$