<span>The choices are as follows:
h2o + 2o2 = h2o2
fe2o3 + 3h2 = 2fe + 3h2o
al + 3br2 = albr3
caco3 = </span><span>cao + co2
The correct answers would be the second and the last option. The equations that are correctly balanced are:
</span> fe2o3 + 3h2 = 2fe + 3h2o
caco3 = cao + co2
To balance, it should be that the number of atoms of each element in the reactant and the product side is equal.
Explanation:
B. The light bends in the water causing the straw to look different.
This happens due to the refraction of light.
Answer:
Physical Change
Explanation:
The ice isn't changing what it is, because its still water (even though its in a different form) If you freeze it again it will be exactly the same and so its a Physical Change
