Answer:
single replacement reaction
Explanation:
This is a kind of single replacement reaction where you switch either cations or anions. Here you switched Ca for H and produced Cacl2 and H2 gas by itself.
Air is a mixture, Its constituens can be seperated
Answer:
ICMP Echo Request
Explanation:
ICMP Echo Request is a form of probe or message sent by a user to a destination system.
Answer:
Nucleus
Explanation: it is the center of the atom, and contains protons and nuetrons
A control group is the group in an experiment that does not receive any sort of change, to then be compared to the other treated objects at the end of the study.
