The answer is (2) 2, because a total of 6 electrons is transferred. We can know the electron transferred number form Mg to Mg2+ ion. There is 3 Mg involved and two electrons per atom. So total is 6,
Answer:
Explanation:
For reaction stoichiometry problems like this, convert given data to moles and set up a ratio expression that relates to the balanced equation. That is ...
Given Rxn => Mg(OH)₂ + 2HCl => 2H₂O + MgCl₂
Given mass => 3.26g = (3.26g)/(58g/mol) = 0.056 mole Mg(OH)₂
If from equation 1 mole Mg(OH)₂ reacts with 2 moles HCl
then, 0.056 mole Mg(OH)₂ reacts with x moles HCl
Setting up ratio and proportion expression ...
=> (1 mole Mg(OH)₂) /(0.056 mole Mg(OH)₂) = (2 moles HCl)/x
=> x = [2(0.056)/(1)] mole HCl neutralized = 0.112mole HCl (36g/mol)
= 4.05 grams of HCl neutralized.
Answer:
i have no clue whats going on here but imma act like i do.....
Explanation:
The answer is hydrogen. the first element in the periodic table.
Explanation:
The reaction equation will be as follows.
In this reaction, breakage of hydrogen and chlorine bond takes place whereas the formation of O-H bond takes place.
Therefore, enthalpy of the reaction will be calculated as follows.
=
= 432 kJ/mol - 464 kJ/mol
= -32 kJ/mol
Negative sign indicates that heat is liberating.
Thus, we can conclude that the given reaction is exothermic in nature and net enthalpy change is 32 kJ/mol.