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diamong [38]
3 years ago
13

How many sets of quantum numbers must be used to describe the electrons in a neutral beryllium atom?

Chemistry
1 answer:
Georgia [21]3 years ago
4 0

Answer:

You must use four sets of quantum numbers.

Step-by-step explanation:

A neutral Be atom has four electrons, and each electron has its own unique set of the four quantum numbers n, l, mₗ and mₛ.

Here is the set of quantum numbers for each electron.

<u>Electron</u>   <u>n</u>     <u> l </u>    <u>m</u>ₗ   <u> mₛ </u>

     1           1     0     0    +½

    2           1     0     0    -½

    3           2    0     0    +½

    4           2    0     0    -½

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Sodium metal (Na) reacts explosively with water to form sodium hydroxide (NaOH) and hydrogen gas. How many moles of sodium are n
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Answer:

308 moles of sodium

Explanation:

The balanced equation for the chemical reaction between sodium metal (Na) and water (H₂O) is the following:

2 Na(s) + 2 H₂O → 2 NaOH(aq) + H₂(g)

From the equation, we can see that 2 moles of Na react with 2 moles of H₂O to give 2 moles of NaOH and 1 mol of H₂ (hydrogen gas). So the stoichiometric mole ratio between Na and H₂ is: 2 mol Na/1 mol H₂. Thus, we multiply the mole ratio by the moles of H₂ to be produced to obtain the moles of Na required:

moles of Na required =  2 mol Na/1 mol H₂ x 154 moles H₂ = 308 moles Na

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c3H8 + 5O2 = 3CO2 + 4H2O When 44.0 grams of propane (C3H8) under goes complete combustion, how many grams of water will be produ
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<u>Answer:</u> 72 grams of water will be produced.

<u>Explanation:</u>

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\text{moles of propane}=\frac{44g}{44g/mol}=1mole

For the reaction of combustion reaction of propane, the equation follows:

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By Stoichiometry of the reaction,

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Now, to calculate the amount of water, we use equation 1, we get:

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Answer:

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