<u>Answer:</u> The correct answer is Option 5.
<u>Explanation:</u>
- To calculate the molarity of the solution after mixing 2 solutions, we use the equation:
where,
are the n-factor, molarity and volume of the NaOH.
are the n-factor, molarity and volume of the 
We are given:
Putting all the values in above equation, we get:
- To calculate the molarity of acid, we use the equation given by neutralization reaction:
where,
are the n-factor, molarity and volume of acid which is 
are the n-factor, molarity and volume of base.
We are given:
Putting values in above equation, we get:
Hence, the correct answer is Option 5.
Gallium Selenide is the non chemical name for Ga2Se3
Answer:PH2=0.994atm, mass of zinc=0.606g
Explanation:
Equation for the reaction is written as;
Zn(s) + 2HCl(aq) - ZnCl2(aq) + H2(g)
V= 240ml = 0.240L
T= 30.8oC = 303.8K
Ptotal= 1.036atm
Pwater = 32mmHg at 30oC = 0.042atm
Therefore
PH2 = Ptotal - Pwater
= 1.036-0.042atm
=0.994atm
But PV= nRT
n = PV/RT
= 0.994x0.240/0.0821x303.8
= 0.24/24.94
=0.009324moles
For the grams of zinc
n=mass in grams/molar mass
Mass in grams = no of moles x molar mass
=0.009324x65 = 0.606g
Answer:
Al₂(CO₃)₃ → Al₂O₃ + 3CO₂ Decomposition
Explanation:
This reaction is a decomposition type, we make two compounds from one. This is the case where a single substance breaks down, producing two or more different substances. In orden to balance it we need to count.
We have 2 Al in both sides so at least it is balanced, but we have 3 C in reactant side from the carbonate and we may need 3 C in product side.
In conclussion we have 2 Al and 3 C on both sides. In reactant side we count 9 O so in product side we have 6 O from the Co₂ and 3 O from the aluminum oxide. Finally the reaction is balanced
