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Rashid [163]
3 years ago
6

Describe the Electromagnetic spectrum. Which waves have most/least energy? List the colors in the visible spectrum from weakest

to strongest.
Chemistry
1 answer:
IRISSAK [1]3 years ago
4 0
Sport I’m not answering but I need points to ask question terrible sorry
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3. Which of the following is the correct mathematical expression to use to
xxTIMURxx [149]

Answer:

The pH of a 0.10 Maqueous Ba(OH)2 solution at 25°C is 13.30

Explanation:

The balanced equation is Ba(OH)2(s)→Ba2++2OH−

This indicates that the concentration is 0.2 M

We will find H+ ion concentration

As we know that

[H+][OH−]=1.0×10−14M

Given -  

[OH−]=2.0×10−1M

Putting value of [OH-] in above equation we get -  

[H+]=5.0×10−14M

pH=−log10[H+]

pH=−log10[5.0×10−14] = 13.30.

8 0
3 years ago
a change will only occur one time. group of answer choices cyclic periodic unidirectional bidirectional
Irina18 [472]

A change will only occur one time in unidirectional.

Because

Cyclic : Cyclic compounds are chemical compounds having a basic non-linear structure. In other words, these are ring structures. One or more series of atoms in the compound is connected to form a ring structure.

Periodic : The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number.

Unidirectional : compound is operating or moving in one direction only and it does not move in other direction.

Bidirectional : Capable of reacting or functioning in two, usually opposite, directions.

Thus, A change will only occur one time in unidirectional.

Learn more about Chemical Compound are:

brainly.com/question/26487468

#SPJ4

8 0
2 years ago
What human activity contributes to air pollution?
Ne4ueva [31]

Answer:burning of fossil fuels and the decrease of oxygen and the increase of carbon dioxide

Explanation:

5 0
3 years ago
Read 2 more answers
Which of these is an example of an abiotic factor?
dolphi86 [110]

What are the choices? I'll answer once you tell me those

8 0
3 years ago
The acid-dissociation constant, ka, for gallic acid is 4.57 ⋅ 10-3. what is the base-dissociation constant, kb, for the gallate
LiRa [457]
Hello!

To determine the Kb of gallic acid is actually very simple. 

The dissociation reaction of Gallic Acid (HGal) is the following:

HGal+H₂O ⇄ H₃O⁺ + Gal⁻

The equation for converting from Ka to Kb is the following:

Ka*Kb=Kw \\  \\ Kb= \frac{Kw}{Ka}= \frac{1*10^{-14} }{4,57*10^{-3} }=2,19 * 10^{-12}

So, the Kb is 2,19*10⁻¹²

Have a nice day!
3 0
3 years ago
Read 2 more answers
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