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Fed [463]
3 years ago
5

Rank the following in terms of increasing electronegativity. 1. Na, N, O, Mg, F 2. Na, Mg, N, O, F 3. F, O, N, Na, Mg 4. F, O, N

, Mg, Na 5. F, Mg, Na, O, N
Chemistry
1 answer:
Firlakuza [10]3 years ago
4 0

Answer:

2. Na, Mg, N, O, F (Option 2)

Explanation:

Let's look the electronegativity in the periodic table for each element.

F → 4

Na → 0.9

Mg → 1.2

O → 3.4

N → 3

So the correct orden is Na, Mg, N, O, F

Electronegativity is the ability for the atoms to catch electrons in a bond.

It is a periodic table which increase in a diagonal way, from Fr and Ra, the less electronegatives to F, the most.                                                                                                                                                                                                                                                    

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Katen [24]

Answer: 12.0 milliliters of 6.50 M HCl ( aq ) are required to react with 2.55 g Zn.

Explanation:

moles =\frac{\text {given mass}}{\text {Molar mass}}

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The balanced chemical equation is :

Zn(s)+2HCl(aq)\rightarrow ZnCl_2(aq)+H_2(g)

According to stoichiometry:

1 mole of zinc reacts with = 2 moles of HCl

Thus 0.0390 moles of zinc reacts with = \frac{2}{1}\times 0.0390=0.0780 moles of HCl

To calculate the volume for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution in ml}}     .....(1)

Molarity of HCl solution = 6.50 M

Volume of solution = ?

Putting values in equation 1, we get:

6.50M=\frac{0.0780\times 1000}{\text{Volume of solution in ml}}

{\text{Volume of solution in ml}}=12.0ml

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3 years ago
The molar mass of Beryllium (Be)
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adelina 88 [10]

Answer:

3.74g of ethylene glycol must be added to decrease the freezing point by 0.400°C

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One colligative property is the freezing point depression due the addition of a solute. The equation is:

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One way photosynthesis supports the laws of thermodynamics is through the first law that establishes energy is conserved, but the form of the energy can change.

This is because, in photosynthesis, the initial solar energy is transformed into chemical energy by storing the energy in carbon-hydrogen chemical bonds. This means the form of energy has changed but the energy is preserved.

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Learn more about photosynthesis in: brainly.com/question/1388366

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