Which of these equations i balanced a. 3h2so4+2al > al2(so4)3+3h2 b. 2kcl+pb(no3)2 > kno3 +pbcl2

Equation A:
3H2SO4+2AL ---> AL2(SO4)3+3H2
For the reactants we have:
6 moles of hydrogen
3 moles of sulphur
12 moles of oxygen
2 moles of aluminum
For the products we have:
2 moles of aluminum
3 moles of sulphur
12 moles of oxygen
6 moles of hydrogen
Comparing the number of moles of each element in the reactants and products side of the equation, we can see that this equation is balanced

Equation B:
2KCL+Pb(NO3)2 ---> KNO3 +PbCl2
For the reactants we have:
2 moles of K
2 moles of Cl
1 mole of Pb
2 moles of N
6 moles of O
For the products we have:
1 mole of K
1 mole of N
3 moles of O
1 mole of Pb
2 moles of Cl
Comparing the number of moles of each element in the reactants and products side of the equation, we will find that K,N and O are not balanced.
Therefore, this equation is not balanced.

Answer:

a. energy is absorbed in the reaction.

explanation:

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.