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erastovalidia [21]
2 years ago
13

Explain why the structure of Copper [ 1s², 2s², 2p⁶, 3s², 3p⁶, 3d¹⁰,4s¹] is more stable than [ 1s², 2s², 2p⁶, 3s, 3p²⁶, 3d⁹,4s²

]. ​
Chemistry
1 answer:
VashaNatasha [74]2 years ago
4 0

A subshell which is 100% full or 50% full is more stable than subshells which are partially filled with a number of electrons less than or greater than half the number of electrons which can be held by the subshell.

Explanation:

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Calculate the pH of each solution at 25∘C
JulijaS [17]

Answer: pH of HCl =5, HNO3 = 1,

NaOH = 9, KOH = 12

Explanation:

pH = -log [H+ ]

1. 1.0 x 10^-5 M HCl

pH = - log (1.0 x 10^-5)

= 5 - log 1 = 5

2. 0.1 M HNO3

pH = - log (1.0 x 10 ^ -1)

pH = 1 - log 1 = 1

3. 1.0 x 10^-5 NaOH

pOH = - log (1.0 x 10^-5)

pOH = 5 - log 1 = 5

pH + pOH = 14

Therefore , pH = 14 - 5 = 9

4. 0.01 M KOH

pOH = - log ( 1.0 x 10^ -2)

= 2 - log 1 = 2

pH + pOH = 14

Therefore, pH = 14 - 2 = 12

8 0
3 years ago
What is an atomic number
rusak2 [61]
An atomic number is the number of protons that the atom of a particular element has. 

For example, take carbon. Carbon has 6 protons. It's atomic number is 6.
5 0
3 years ago
Molar mass of 34.00 g/mol molecular formula
alukav5142 [94]
Multiplying the subscripts within the empirical formula by this number gives you the molecular formula H2O2. 
8 0
3 years ago
Atoms of hydrogen can become helium atoms during a chemical reaction.<br> True<br> False
marishachu [46]

Answer:

false

in chemical reaction element doesnot change into another

Explanation:

3 0
3 years ago
Read 2 more answers
What is meant by the term chemical reaction​
pantera1 [17]

Answer:

<h3>\huge{ \underline{ \underline { \bold{ \sf{ \orange{See \: below}}}}}}</h3>

Explanation:

▪️\underline{ \bold{ \sf{ \blue{Chemical \: reaction}}}}

⇒The composition , decomposition or displacement of molecules of matter during chemical change is called chemical reaction.

▪️\underline{ \bold{ \sf{ \purple{ \: Further \: more \: explanation}}}}

Various conditions bring about these changes. The chemical reactions are represented by chemicalequation. The compounds or elements that take part in chemical reaction are called reactant. They are written at the left side of an arrow that represent a change while the compound or elements that formed after the chemical change are called product. They are written at the right side of the arrow.

▪️\underline{ \bold{ \sf{ \purple{For \: example}}}}

When nitrogen reacts with hydrogen to form ammonia :

Nitrogen + Hydrogen ⇒ Ammonia

N₂ + 3H₂ ⇒ 2NH₃

<u>Presentation </u><u>of </u><u>a </u><u>chemical </u><u>reaction </u><u>in </u><u>the </u><u>form </u><u>of </u><u>equation </u><u>is </u><u>called </u><u>chemical </u><u>equation </u>. <u>Chemical equation may be word equations or formula equations.</u>

Hope I helped!

Best regards!!

3 0
3 years ago
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