**Answer:**

I don't know if this will help but. The Great Sphinx has suffered from erosion and vandalism. Hatshepsut's stepson was too young to rule at the time of her husband's death, so she just took the job.

**Answer:**

(i) 5-day BOD of the waste is 120 mg/l.

(ii) The ultimate carbonaceous BOD (Lo) is 20 mg/l.

**Explanation:**

The dilution factor D is 0.05.

The initial DO is 8.0 mg/L and the DO after 5 days is 2.0 mg/L.

The BOD of the waste for an unseeded mixture is

The ultimate carbonaceous BOD (Lo) can be calculated as

<u>**Answer:**</u>** The volume of concentrated solution required is 9.95 mL**

<u>**Explanation:**</u>

**To calculate the pH of the solution, we use the equation:**

**We are given:**

pH = 0.70

**Putting values in above equation, we get:**

1 mole of nitric acid produces 1 mole of hydrogen ions and 1 mole of nitrate ions.

Molarity of nitric acid = 0.199 M

**To calculate the volume of the concentrated solution, we use the equation:**

where,

are the molarity and volume of the concentrated nitric acid solution

are the molarity and volume of diluted nitric acid solution

**We are given:**

**Putting values in above equation, we get:**

**Hence, the volume of concentrated solution required is 9.95 mL**

Answer: c

Explanation:

In case of 4 mols of product, we need 4/2 mole ratio x 130 = 260 Kcal

**Answer:**

**Single replacement is a reaction in which one element reacts with another compund to form another compound and another element.**

**planation:**