Answer:
D
Explanation:
Protons and Neutrons both have a mass of about 1 amu so you add them but electrons have a mass of 0 amu so they are left out.
Answer:pluto
Explanation:
Since 2006, per the International Astronomical Union's planetary criteria, Pluto isn't considered a planet because it hasn't cleared the neighborhood around its orbit of other objects.
For the answer to the question above,
I am going to assume that MnO2 is a catalyst most likely breakdown of H2O2
H2O2----MnO2------> H2O + 1/2 O2
<span>in that case, B) is answered in the trump suit </span>
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<span>edit: I need to have a plate account to see - which I don't </span>
is it something like
2H2O2 ---------------> 2H2O + O2
...............MnO2
<span>where MnO2 is underneath the arrow, in that case, it means it is a catalyst and production will DRASTICALLY decrease in production</span>