Which of the following happens during a chemical reaction?
2 answers:
Answer: Option (c) is the correct answer.
Explanation:
A chemical reaction is defined as the reaction that leads to formation of new substances through exchange of electrons.
For example,
Here, aluminium on displacing copper from copper chloride leads to the formation of a new compound, that is, aluminium chloride.
Hence, it shows that atoms of reactant molecules rearrange themselves to form new substances.
Thus, we can conclude that during a chemical reaction atoms of reactants rearrange to form new substances .
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Answer:
5)0.53liters
6)1.634.6°c
Explanation:
5) v1=25liters, t1=12000°c. v2=?, t2=250°c
v2=(250×25)/12000
v2=6250/12000
v2=0.52liters
6)v1=130,v2=85, t1=2500, t2=?
t2=(85×2500)/130
t2=212500/130
t2= 1634.6°c
Answer:
Precentage error = 7.23%
Explanation:
The precentage error formula is the useful method for determining precision of your experimental result
It can be calculated using :
So we get percentage error = 7.23%
Precision means how close the experimental value to the true value or theoretical value
If percentage error is large it means experimental results are deviated and there is need to check mistakes,imprecision in the experiment
If the percentage error is zero it means the experiment is perfectly done without inaccuracy