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3 years ago

How many valence electrons are in an atom of magnesium?

Chemistry

2 answers:

dimulka [17.4K]3 years ago

8 0

There are two valence electrons in a single atom of magnesium.

sasho [114]3 years ago

4 0

Hummm 2 i believe.....

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What charge would you expect for an formed by S?

sp2606 [1]

Answer:

in this the correct answer is option 2.

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2 years ago

Is the atomic number the lesser or the greater of the numbers for each atom on the periodic table?

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Lesser. atomic number means proton number

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3 years ago

The equilibrium: 2 NO2(g) \Longleftrightarrow&iff; N2O4(g) has Kc = 4.7 at 100ºC. What is true about the rates of the forwar

Sergeeva-Olga [200]

Answer:

Initial: forward rate > reverse rate
Equilibrium: forward rate = reverse rate

Explanation:

2NO₂(g) → N₂O₄(g) Kc=4.7

The definition of <em>equilibrium</em> is when the forward rate and the reverse rate are <em>equal</em>.

Because in the initial state there's only NO₂, there's no possibility for the reverse reaction (from N₂O₄ to NO₂). Thus the forward rate will be larger than the reverse rate.

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3 years ago

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seraphim [82]

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2 years ago

Read 2 more answers

12. What is the volume of 0.07 mol of neon gas at STP?

scoundrel [369]

<h3>Answer:</h3>

2 L Ne

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

Using Dimensional Analysis
STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

<h3>Explanation:</h3>

<u>Step 1: Define</u>

0.07 mol Ne (g)

<u>Step 2: Identify Conversions</u>

STP - 22.4 L per mole

<u>Step 3: Convert</u>

Set up: $\displaystyle 0.07 \ mol \ Ne(\frac{22.4 \ L \ Ne}{1 \ mol \ Ne})$
Multiply: $\displaystyle 1.568 \ L \ Ne$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 1 sig fig.</em>

1.568 L Ne ≈ 2 L Ne

7 0

3 years ago