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3 years ago

5

Which of the following describes the sharing of a nonbonding electron pair on a nitrogen molecule with an oxygen atom, resulting

in a nitrous oxide molecule?

1 answer:

Gala2k [10]3 years ago

5 0

This is coordinate (dative) bonding where the nitrogen atom donates 2 electrons to the oxygen but is still chemically bonded.

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The table below gives the atomic mass and relative abundance values for the three isotopes of element M.

Serhud [2]

The average atomic mass formula is:

$average atomic mass = \Sigma (percent abundane)\times (atomic mass)$

Substituting the values in the formula:

$average atomic mass = \frac{78.99\times 23.9850+10\times 24.9858+11.01\times 25.9826}{100}$

$average atomic mass = \frac{1894.57515+249.858+286.068426}{100}$

$average atomic mass = 24.30516 amu$

Hence, $24.30516 amu$ is the average atomic mass of element M.

7 0

3 years ago

Burning magnesium gives us magnesium oxide. This is an example of a reaction.

frez [133]

Answer: -

Oxidation, Oxygen

Explanation: -

Burning of magnesium gives us magnesium oxide.

The chemical symbol of magnesium is Mg.

The chemical symbol of magnesium oxide is MgO.

So, the balanced chemical equation is

2Mg + O2 – 2 MgO.

We see that the element added is O Oxygen. So, the reaction is oxidation.

In oxidation always, oxygen is the common element involved in all chemical reactions of this kind.

5 0

4 years ago

Read 2 more answers

The following is known as the thermite reaction: 2Al(s)+Fe2O3(s)→Al2O3(s)+2Fe(s) This highly exothermic reaction is used for wel

Colt1911 [192]

Answer:

$\Delta H_{rxn}=-847.6\ KJ/mol.$

Explanation:

The balanced chemical equation is:

$2Al(s)+Fe_2O_3(s)-->Al_2O_3+2Fe(s)$

Now, standard values of $\Delta H_f\ of\ all\ participants\ of\ reaction.$

$\Delta H_f(Al_2O_3)=-1669.8\ KJ/mol\\\Delta H_f(Fe_2O_3)=-822.2\ KJ/mol\\\Delta H_f(Al(s))=0\ KJ/mol\\\Delta H_f(Fe(s))=0\ KJ/mol\\$

Now, We know $\Delta H_{rxn}=\Delta H_{products}-\Delta H_{reactants}$

Putting all values of $\Delta H_f$ to above equation.

We get,

$\Delta H_{rxn}=-847.6\ KJ/mol.$

Hence, this is the required solution.

6 0

4 years ago

What is the mass percent of 6.8 of sucrose in 38.4 grams of water

amm1812

The answer is 83% percent

4 0

3 years ago

A(n)<br> wave carries energy through matter.

denis23 [38]

Answer:

A wave is a disturbance that carries energy from one place to another through matter and space. When we through a stone or a pebble in calm water, then the particles of water moves up and down and this process continues for some time. This implies that there is a disturbance produced in water.

Explanation:

4 0

4 years ago