I think it is B for the answer
Answer:
Which of the following statements about the periodic table is true?
Elements in the same column are similar in their properties.
Elements in the same row are similar in their properties.
Elements that start with the same letter are similar in their properties.
Elements that have the same atomic mass are similar in their properties.
Explanation:Which of the following statements about the periodic table is true?
Elements in the same column are similar in their properties.
Elements in the same row are similar in their properties.
Elements that start with the same letter are similar in their properties.
Elements that have the same atomic mass are similar in their properties.
A + BC ---> AB + C
So here one reactant (A) is accepting a group which is being given by another compound (BC) however the A is not giving any group / element or ion
So this single displacement
Similarly in the given reaction
the anion OH- is only being replaced
The element Ca accepts OH- and H2O loses the same group to form new element H2
So the correct answer is
Single replacement also known as single displacement.
Answer:
The answer is A and D
Explanation: Sorry i know I'm late have a good day! :)
Answer:
B
Explanation:
Neutralization reaction is where you add equal moles or quantity of acid and base so that they both neutralize each other or "cancel" each other making the pH to be neutral which is 7. Group B is likely wrong as their pH is 5 which means they added too much acid, if they had equal acid and base their pH would be 7 however since they added more acid, there was still some acid left after the initial neutralization and this acid decreased the pH to 5.