Answer : The final energy of the system if the initial energy was 2000 J is, 3500 J
Solution :
(1) The equation used is,
where,
= final internal energy
= initial internal energy
q = heat energy
w = work done
(2) The known variables are, q, w and
initial internal energy = = 2000 J
heat energy = q = 1000 J
work done = w = 500 J
(3) Now plug the numbers into the equation, we get
(4) By solving the terms, we get
(5) Therefore, the final energy of the system if the initial energy was 2000 J is, 3500 J
Explanation:
1.combined
2.bonds
3.retain
4.elements
hydrogen gas,oxygen gas
extinguish
5.sodium and chlorine
6.violently
7.Don't know for sure
I'm certain most but not all
Answer:- 30 moles of oxygen are required if 12 moles of 
are consumed.
Solution:- The given balanced equation is:
From this balanced equation, there is 2:5 mol ratio between and 
.
We are asked to calculate the moles of required to react with 12 moles of .
It's a mol to mol conversion and the set up for this would be as:
= 
So, 30 moles of oxygen are required to react with 12 moles of .
the significant figures is 5 and decimals is 6
Answer:
A one-point pH change indicates the strength of the acid or base has increased or decreased tenfold; a 2-point change indicates a 100-fold change in acidity or alkalinity, and a 3-point change in pH indicates a 1000-fold change. Examples: • An increase in pH from 7.0 to 8.0 means the water is 10 times more basic.
Explanation:
