I’m just answering this so i can ask more questions and it has to be 20 words long so i hope you figure your problems out and merry christmas happy new year
Answer:
Adding Catalyst can Speed up a Chemical reaction
Answer:
<span> Its location is in the nucleus, because the particle is a proton or a neutron.</span>
The electron configuration for a atom whose element has a atomic number of 8 (Oxygen) is 2,6
Answer:
HgO (empirical formula)
Explanation:
4.08 - 3.78 = 0.3g (oxygen)

0.02 : 0.02
0.02/0.02 : 0.02/0.02
1 : 1 (ratio)
HgO ( empirical formula)
2HgO ----> 2Hg + O2 ( your equation correct)