Answer:
I think that middle school teachers are interested in teaching middle schoolers.
Has 9 protons and 9 electrons in per atom.........
I would say is because of the Boron from O?
Answer:
147 amu
Explanation:
CaCl2. 2H2O
=>40*1+35.5*2+2*1*2+2*16
=>40+71+4+32
=>147 amu..
I hope u will understand it:-):-)