Answer:
Explanation:
From the given information;
Let Q(t) = mass of dye in the tank as a function of time
The mass in the tank = 200 L × (1g/L) = 200 g
Using the law of mass conservation;
Q(0) = 200
By finding the solution to the ODE using the method of separation of variables;
Using the initial condition;
200 = Q(0) = C
1% of 200g = 2g of dye solution
∴
t = 460.5 hours
Answer:
Exothermic reaction
Explanation:
Consider the reaction
A + B ⟶ C
If energy is released, the product C is at a lower potential energy level than the reactants A and B (see diagram).
Conversely, the reactants A and B are at a higher energy level than the product.
B is wrong. In an endothermic reaction, the reactants A and B are at a lower energy level than the product.
C and D are both wrong. Both types of reaction can be exo- or endothermic.
The reaction of sodium sulfide with hydrogen sulfide can be shown as
Sodium hydroxide is completely reacting and thus act as limiting reactant
Thus, 2.31 g Na2S produced.