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spin [16.1K]
3 years ago
9

Of the atoms listed below, which one will have at least one electron in its d orbital?

Chemistry
1 answer:
Oksanka [162]3 years ago
5 0

Answer:

D. Cr

Explanation:

In order to determine which atom has at least one electron in its d orbital, we have to write their theoretical electron configurations.

  • ₁₂Mg 1s² 2s² 2p⁶ 3s²
  • ₁₉K 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
  • ₁₆S 1s² 2s² 2p⁶ 3s² 3p⁴
  • ₂₄Cr 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁴

Cr has 4 electrons in d orbitals. Cr belongs to the d-block in the periodic table.

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Which chemical equation represents a decomposition reaction?
MrMuchimi

Decomposition reaction D. 2H20⇒ 2H2 + O2

<h3>Further explanation </h3>

Every chemical reaction involves a compound consisting of reactants and products  

Reactants are compounds that react and form new compounds called products

There are several forms of reactions that can occur, including single replacement, double replacement, synthesis, decomposition, etc.

A. 2C2H6 + 702 ⇒ 4CO2 + 6H20

Combustion : reaction of Hydrocarbon and Oxygen

B. AgNO3 + LiCl → AgCl + LINO3

Double replacement : there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product

C. Ca + MgS → CaS + Mg

Single replacement :one element replaces the other elements of a compound to produce new elements and compounds

D. 2H20⇒ 2H2 + O2

Decomposition : One compound breaks down into 2 components

8 0
2 years ago
Name an insoluble cobalt salt​
amm1812

Cobalt sulphate is the usual source of water-soluble cobalt since it is the most economical salt and shows less tendency to deliquesce or dehydrate

6 0
2 years ago
Nitroglycerin is a dangerous powerful explosive that violently decomposes when it is shaken or dropped. The Swedish chemist Alfr
marshall27 [118]

<u>Answer:</u> The balanced chemical equation for the decomposition of nitroglycerin is written below.

<u>Explanation:</u>

Decomposition reaction is defined as the reaction in which a single large substance breaks down into two or more smaller substances.

Every balanced chemical equation follows law of conservation of mass.

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

The balanced chemical equation for the decomposition of nitroglycerin follows:

4C_3H_5N_3O_9(l)\rightarrow 12CO_2(g)+10H_2O(g)+6N_2(g)+O_2(g)

By Stoichiometry of the reaction:

1 mole of liquid nitroglycerin decomposes into 12 moles of carbon dioxide gas, 10 moles of gaseous water, 6 moles of dinitrogen gas and 1 mole of dioxygen gas.

Hence, the balanced chemical equation for the decomposition of nitroglycerin is written above.

3 0
3 years ago
Calculate the percent covalent character of a chemical bond between oxygen and beryllium.
dezoksy [38]

Beryllium Oxide has a molecular formula Be-O

% covalent character in Be-O = 100 - % ionic character in Be-O

Now,

% ionic character = {1 - exp[(-0.25)(E(Be)-E(O))²]}*100

where,

E(Be) and E(O) are the electronegativity values of Be and O

Based on the Paulings scale:-

E(Be) = 1.57

E(O) = 3.44

% ionic = {1 - exp[(-0.25)(1.57-3.44)²]}*100 = 58.28%

Therefore, % covalent = 100 -58.28 = 41.72%

Ans: b) 41 percent

8 0
3 years ago
I NEED HELP WHOEVER HAS BEST ANSER GETS MARK BRAINLIEST!
larisa86 [58]

Answer:

no

Explanation:

if you are referring to the first question, the answer is no. the equation is unbalanced because the left side has 4 hydrogens and the right has only 2, and the left has 2 oxygens while the right has 3. this means it does not follow the law of conservation of mass because each side has a different mass.

5 0
3 years ago
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