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olya-2409 [2.1K]
3 years ago
10

Using standard heats of formation, calculate the standard enthalpy change for the following reaction.

Chemistry
1 answer:
UNO [17]3 years ago
3 0
George washing ton hiyayay

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If 33.6 grams of KCl are dissolved in 192 grams of water, what is the concentration of the solution in percent by mass?21.2% KCl
Lelu [443]
The answer here would be 14.9 %KCl and here is how I can explain why:
33.5g / 225.6g x 100% = 14.9% 
<span>you are looking for % of KCl in the solution, you have to add the mass of the KCl and water to get the total mass of the solution
Hope this helps a lot
</span>

7 0
4 years ago
In dry climates, people often dig wells to find additional sources of water
vekshin1

Answer:

D i think, sorry if its wrong

Explanation:

3 0
3 years ago
Read 2 more answers
The decomposition of potassium chlorate into kcl &amp; o2 is used as a source of oxygen in the laboratory. How many moles of pot
fredd [130]

Answer:

10moles of kcl

Explanation:

2 K C l O3 →  2 K C l  +  3 O 2

Notice that you have a  2 : 3  mole ratio between potassium chlorate and oxygen gas, which means that, regardless of how many moles of the former react, you'll always produce 2/3 times more moles of the latter.

15 mol of O2 * ((2mol of KCLO3)/(3mol of O2))= 15*2/3=10 Mol

5 0
4 years ago
Which element has the same number of valence electrons as oxygen. Neon sulfur fluorine nitrogen
Dovator [93]
Sulfur has the same amount, like all the other elements in group 16, has six valence electrons.
5 0
3 years ago
What type of bond is most likely to form between two nitrogen (N) atoms:
IRISSAK [1]

Answer:

B. Nonpolar covalent bond

Explanation:

Between two Nitrogen atoms, a non-polar covalent bond would be formed.

So, what is the nature of a covalent bond, and what makes a covalent bond non-polar?

A covalent bond is a type of bond that forms between two atoms that shares their valence electrons. The valence electrons are donated by the two atoms and they are shared in order to achieve an octet. This bond type is predominantly between atoms that have an electronegativity difference less than 0.5. Using the electronegativity values, we see that a difference of 0 would be obtained.

Due to equal affinities of the two atoms for the valence electrons, none of them will pull the electrons closer to themselves. There won't be any form of charge separation on the two atoms and a Nitrogen molecule will form. This makes the bond type a non-polar covalent type.

6 0
3 years ago
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