Unit cells.
They are the smallest group of atoms that take form of a crystal and can repeat in 3 dimensions.
(I leave off the x10^23 because they both will divide out) Use your per
5.61 x 10^8 (this might not be entirely right, haven’t used scientific notation in a while)
Answer:
....,................................
Explanation:
1= A
2=D
3=C
4=C
Answer is: an instant ice pack becoming cold, splitting a gas molecule and baking bread.
<span>Endothermic reaction
is chemical reaction that absorbs more energy than it releases.
</span>In ice pack, <span>reaction absorbs heat from the surroundings (endothermic reaction), lowering the surrounding temperature.
For splitting molecule and baking bread we must add energy to break bonds between atoms.</span>