At first I thought it was c but then I checked And it’s either B or A? I’m thinking mostly A but good luck
Add the reltive atomic mass of Ca and O which are 40 and 16 respectively after addition we get molecular mass of CaO which is 40+16=56 now divide atomic mass of O by molecular mass of CaO and multiply it with 100 as show n 16/56 *100=28.57%
(NH4)3PO4 :
N = 14 * 3 = 42
H = 1 * 12 = 12
P = 31 * 1 = 31
O = 16 * 4 = 64
-------------------------
42+12+31+64 = 149 g / mol
Hope this helps!.
Microorganism are both helpful and not,
-such as they help clean water,
-useful when it comes to food and alcohol,
-fix atmospheric nitrogen,
-and <span>Microorganisms are essential tools in biotechnology, biochemistry, genetics -and molecular biology.
But aside from helping they can be dangerous because,
-not all but some cause disease and sickness.
-</span><span> contribute to decomposition and spoilage of food, and they can leave toxic waste products behind even if they are eradicated from the contaminated material.
I hope this helps you!!</span>