Answer:
in the presence of water, a strong acid will dissociate quickly and release heat, so it is an exothermic reaction.
Explanation:
LiOH + H2SO4 <span>→ Li2SO4 + H2O
Balance the equation:
Reactants:
Li = 1 • 2
O = 1 • 2 + 4
H = 1 • 2+ 2
S = 1
Products:
Li = 2
O = 4 + 1 • 2
H = 2 • 2
S = 1
Balanced Equation:
</span>2LiOH + H2SO4 → Li2SO4 + 2H2O
Answer:
78.14 % B; 21.86 % H
Step-by-step explanation:
The formula of diborane is B₂H₆.
The masses of each element are:
2B = 2 × 10.81 = 21.62 u
6H = 6 × 1.008 = <u> 6.048 u
</u>
TOTAL = 27.67 u
% B = 21.62/27.67 × 100
= 78.14 %
% H = 6.048/ 27.67
= 21.86 %