It has a negative charge emits energy when it moves to a lower energy orbit from an excited state and it has the same mass as a proton
If the temperature rises in a reaction. Exothermic is if it loses heat.
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Answer:
2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.
Explanation:
Suppose x is the number of litres added to the 10% mixture than the quantity of new mixture is given as below
- litres
- litres
Also the quantity of alcohol is given as
Now the equation is as
So 2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.
Answer:
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