Answer:
Refer to the period table. Use the atomic mass for calculation. Multiply the atomic mass with the number of atoms. For example, Al2(SO4)3. (27 × 2) + (32 x 3) + (16 x 12) = molecular mass
So technicaly the answer is D
I would agree with the second one, not the first. You can't always see the chemical reaction, and it isn't always sudden. But the second claim is true.
<span>Molecular reaction
2HBr(aq) Ba(OH)2 (aq) = 2H2O (l) BaBr2(aq)
Ionic equation
2H 2Br- Ba 2 2OH- --------> Ba 2 2Br - 2H2O
Net ionic equation
2H (aq) 2OH- (aq)- ---------> 2H2O (l)</span>
Answer:
D.
Explanation:
It pushes the experimental results one way or another. Less reliable.
