Answer:
10% solution volume
=7.5 L
30% solution volume = 2.5 L
Explanation:
assume 10% solution volume is x
So 30% solution volume = 10-x
Required 15% solution= x volume of 10% solution+ (10-x) volume of 30% solution
0.15 * 10L= 0.1 x + (10- x)* 0.3
1.5= 0.1 x+ 3 -0.3 x
0.2 x= 1.5
x= 7.5
10% solution volume is x
=7.5 L
So 30% solution volume = 10-x = 10-7.5= 2.5 L
Answer:
(a) HCl is the limiting reactant.
(b) 28.45 g
(c) 19.10 g.
Explanation:
(a) 4HCL(aq) + MnO2(s) ----> MnCl2(aq) + 2H2O(l) + Cl2(g)
Using the relative atomic masses:
4 * (1.008 + 35.45( g of HCl react with (54.983 + 2*15.999) g of MnO2.
145.832 g HCl reacts with 86.981 g MnO2.
So 47.7 g HCl reacts with (86.981 / 145.832) * 47.7 = 28.451 g MnO2.
We have 42.5 g of MnO2 so HCl is the limiting reactant.
(b) The theoretical yield of Cl2 is (70.9 /86.981) * 28.451 = 23.91 g.
(c) The actual yield of chlorine is 23.91 * 0.799 = 19.10 g.
The answer is false i just did that question
Answer:
131.4 mg/L of oxygen is needed to biodegrade the organic compound.
Explanation:
The chemical reaction will be written as:
Concentration of the organic compound = 50 mg/L
This means that 50 milligrams of organic compound in present in 1 L of the solution.
50 mg = 0.050 g
1 mg = 0.001 g
Moles of organic compound =
According to reaction, 2 moles of organic compound reacts with 23 moles of oxygen gas.
Then 0.0003571 moles of an organic compound will react with:
oxygen gas.
Mass of 0.004107 moles of oxygen gas:
0.004107 mol × 32 g/mol = 0.1314 g = 131.4 mg
131.4 mg/L of oxygen is needed to biodegrade the organic compound.