Answer:
O
Explanation:
O is in the red which says nonmetal
Answer:
cần 162,5
Explanation:
100gKNO3 cần 1 mol kno3 từ đó suy ra cần 0,5 mol hg(no3)2 suy ra cần 162,5g hg(no3)2
The 2nd one I believe
Answer- 2nd
Tiny crystals of all three of these compounds are use and making photographic from an explicitly a chemical reaction darkens of them to produce an image on some containing a G plus and CL minus expose light energy the chlorine Zions extra elect electron is a jack better than captured by silver ion