Answer:
B.) If sodium carbonate is added to vinegar, the reaction will absorb heat.
Explanation:
A.) is incorrect because this is not testable. Rather, it is just an opinion that cannot be proven correct or incorrect.
B.) is correct because this statement is testable. Tests need to be run to determine the accuracy of the statement.
C.) is incorrect because this statement explains something that does not need to be tested. It is an example of a physical change when one tears a piece of paper.
D.) is incorrect because this is already a true statement. It is obvious that not all reactions absorb/release heat. While tests could be run to further prove this statement true, it is already considered accurate.
Answer:
cooking food stuff rusting
Explanation:
Si -Atomic number -14 -1s2 2s2 2p6 3s2 3p2 - 4 valence electrons
Explanation:
Answer is 4Al + 3O2 =>2Al2O3
I hope it's helpful!
