The number of electrons in the outermost shell of an atom determines its reactivity. EX: noble gases have a low reactivity because they have a full electron shell, and don't need any more outermost ones.
EX: halogens are highly reactive because they readily gain an electron to fill their outermost shell
Can you make the picture clearer please or tell me what I’m supposed to do in comments?
<h3>
Question #1:</h3>
False.
Melting is a type of chemical change.
<h3>Question #2:</h3>
True.
If the substance's atoms change in any way, it is a chemical change.
<h3>Question #3:</h3>
True.
If a substance is broken or torn, it's still the same substance. (Take tearing paper, for example)
<h3>Question #4:</h3>
False.
Take boiling water for example, when you boil water, it is still water, right?
<h3>Question #5:</h3>
False.
<em><u>Every</u></em> chemical or physical change in matter includes change in energy. <u><em>Not most.</em></u>
<h3>
Question #6</h3>
True.
Hydrogen peroxide (H2O2), has turned into water (H2O) and oxygen (O). The substance has change chemically, therefore it is an chemical change.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I hoped this helps! If you have any questions, feel free to ask! ^^
Answer:Carbon compounds are compounds having carbon as an essential element. These have generally covalent bonding.
There are many types of carbon compounds on the basis of the other elements, but the most important of them are hydrocarbons. They are compounds only made up of carbon and hydrogen. Examples can be-
Ethanol (CH3CH2OH)
Acetone [(CH3)2CO]
Butanone [ CH3C(O)CH2CH3]
Explanation:
Answer:
[OH] = 6.31 * 10^-7 M
Explanation:
Mathematically;
pH + pOH = 14
Mathematically;
pH = -log [H3O+]
also;
pOH = -log [OH]
From the question; [H3O+] = 1.75 * 10^-8 M
pH = -log [1.75 * 10^-8]
pH = 7.76
since pH is normally given to 1 decimal place
we can say pH = 7.8
Now;
pH + pOH = 14
pOH = 14-7.8
pOH = 6.2
now pOH = -log [OH]
[OH] = -antilog 6.2
[OH] = 6.31 * 10^-7 M
