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3 years ago

What are the symbols (in order) for hydrogen, sodium and nitrogen?

Chemistry

2 answers:

Vlad1618 [11]3 years ago

8 0

Answer:

H, NA, N

Explanation

Ulleksa [173]3 years ago

7 0

Answer:

H, Na, N

Explanation:

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Identify the group of elements that correspond to the following generalized electron configuration: [noble gas]ns^2(n-1)d^2

Bezzdna [24]

The group of elements that would have an electron configuration of ns^2(n-1)d^2 would be the Halogens. Elements that belong to this specific group are Fluorine, Chlorine, Bromine, and Iodine. These non-metallic elements are where simple salts are made from a reaction of hydrogen compounds.

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4 years ago

Use the reaction and bond information to answer the question. C2H6 → C2H4 H2 Reactant bond energies: H–C = 413 kJ/mol, C–C singl

nlexa [21]

The energy of the reactant has been higher than the energy of the product, Thus, the reaction has been an exothermic reaction.

Bond energy has been defined as the chemical energy possessed by the bonds in the chemical structure. The energy has been conserved in the chemical reaction.

<h3>Is the reaction endothermic or exothermic?</h3>

In the reaction in which bond energy of the reactant has been higher than the product, it has been an exothermic reaction.

In the reaction in which the bond energy of the product is higher than the reactant, it has been an endothermic reaction.

In the given reaction

$\rm C_2H_6\;\rightarrow\;C_2H_4\;+\;H_2$

The bond energies of reactant has been:

H-C bond = 413 kJ/mol
C-C bond = 347 kJ/mol

The total bond energy of the reactant has been:

$\rm Reactant=6\;\times\;H-C\;bond\;+\;C-C\;bond \\Reactant=6\;\times\;413+347\;kJ/mol\\Reactant=2,825\;kJ/mol$

The total bond energy of the reactant has been 2,825 kJ/mol.

The bond energies of product has been:

H-C = 413 kJ/mol
C=C = 614 kJ/mol
H-H = 432 kJ/mol

The total bond energy of the product has been:

$\rm Product=4\;\times\;H-C\;bond\;+\;C=C\;bond\;+\;H-H\;bond\\Product=4\;\times\;413\;+\;614\;+\;432\;kJ/mol\\Product=2,698\;kJ/mol$

The total bond energy of the product has been 2,698 kJ/mol.

The energy of the reactant has been higher than the energy of the product, Thus, the reaction has been an exothermic reaction, as energy can neither be created nor be destroyed. It has been conserved in the chemical reaction.

Learn more about exothermic reaction, here:

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3 years ago

How many Na atoms are shown in the products?

lakkis [162]

Answer: 6.02214179×1023 atoms

Explanation: I think so

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Which is a diatomic molecule? A)He B)O2 C)NaCl D)CuF2

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B is the correct answer

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When magnesium carbonate, MgCO2, reacts with nitric acid, HNO3, it forms magnesium nitrate, Mg(NO3)2, and carbonic acid, H2CO3.

schepotkina [342]

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3 years ago

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