It is C 2 1 2 1
You have to 1st balance the nitrates then balance the silvers to get the coefficients
This is late but for anyone else who needs it...It's D. Far left
MgF2 is <span>Magnesium fluoride
hope this helps!</span>
Cr2(CO3)3 is Chromium (III) Carbonate or Chromic Carbonate.
It is composed of Chromium, Carbon, and Oxygen. Chromium has 2 atoms, Carbon has 3 atoms, and Oxygen has 9 atoms.
This compound is composed of 36.6% Chromium, 12.7% Carbon, and 50.7% Oxygen.
Just multiply 151 x 0.0001
That will equal:
0.00151 km or if you want to round it then it would be 0.02km