An endothermic chemical reactions products tend to have a higher potential energy than the reactants. Thus making the /\ H positive, not negative.
Q6. 3
Q7. 3
Q8. pH
Q18. 3
Q19. 3
Q20. 4
Hope this helped？？
Answer:
temperature of the reaction vessel
Explanation:
temperature of the reaction vessel
Board up your windows
Go to higher ground
Get food and water
Answer:
There are Seven periods in the periodic table
