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nlexa [21]
2 years ago
14

12NaBr total Na atoms

Chemistry
1 answer:
Scrat [10]2 years ago
4 0

Answer:

12

Explanation:

12NaBr is an ionic compound of Sodium (Na) and Bromine (Br), the question is asking how many total atoms of sodium there are. Because neither of the elements have subscripts, we know that the ratio for the compound is 1:1. This means that there is one sodium atom per NaBr compound. The coefficient, 12, tells us that there are 12 NaBr compounds. If there is one Na atom per compound and 12 compounds, then we know that there must be 12 atoms in total of Na.

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Please help with #2 and #3
Vaselesa [24]

Answer:

2. V_2=17L

3. V=82.9L

Explanation:

Hello there!

2. In this case, we can evidence the problem by which volume and temperature are involved, so the Charles' law is applied to:

\frac{V_2}{T_2}=\frac{V_1}{T_1}

Thus, considering the temperatures in kelvins and solving for the final volume, V2, we obtain:

V_2=\frac{V_1T_2}{T_1}

Therefore, we plug in the given data to obtain:

V_2=\frac{18.2L(22+273)K}{(45+273)K} \\\\V_2=17L

3. In this case, it is possible to realize that the 3.7 moles of neon gas are at 273 K and 1 atm according to the STP conditions; in such a way, considering the ideal gas law (PV=nRT), we can solve for the volume as shown below:

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V=\frac{3.7mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1atm}\\\\V=82.9L

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6 0
3 years ago
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Olenka [21]
Is there something else that goes along with this?
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What’s the full electronic configuration for lead
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Answer:

1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4p6, 5s2, 4d10, 5p6, 6s2, 4f14, 5d10, 6p2.

Explanation:

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Nat2105 [25]

Answer:

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Carbon = 2p²

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Xenon = 5p⁶

Explanation:

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Its electronic configuration is:

K = [Ar]  4s¹

So its highest energy electrons are 4s¹.

2) Carbon is present in group 14.

Its electronic configuration is:

C = [He]  2s² 2p²

So its highest energy electrons are 2p².

3) Sulfur is present in group 16.

Its electronic configuration is:

S = [Ar]  3s² 3p⁴

So its highest energy electrons are 3p⁴.

4) Barium is present in group 2.

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Ba = [Xe]  6s²

So its highest energy electrons are 6s² .

5) Xenon is present in group 18.

Its electronic configuration is:

Xe= [Kr]  4d¹⁰ 5s² 5p⁶

So its highest energy electrons are 5p⁶

5 0
4 years ago
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