Answer:
The volume of the concentrated nitric acid taken: <u>V₁ = 4.3 mL</u>
Explanation:
Given: Final pH of nitric acid (HNO₃) solution= 1.30
Volume of HNO₃ solution: V₂ = 600.0 mL
Concentration of stock HNO₃ solution: M₁ = 7.0 M
Volume of the stock HNO₃ solution: V₁ = ?
To find out <u>the concentration of HNO₃ solution (M₂),</u> we use the following equation: pH = - ㏒ [H⁺]
⇒ 1.3 = - ㏒ [H⁺]
⇒ ㏒ [H⁺] = - 1.3
⇒ [H⁺] = antilog (- 1.3)
⇒ [H⁺] = antilog (- 1.3) = 0.050 M = M₂
Now, to calculate<u> the volume of concentrated 7.0 M HNO₃ (V₁)</u> that should be added to prepare 600.0 mL of 0.050 M HNO₃ solution, we use the dilution equation: M₁ × V₁ = M₂ × V₂
⇒ V₁ = M₂ × V₂ ÷ M₁
⇒ V₁ = (0.050 M) × (600.0 mL) ÷ (7.0 M)
⇒ <u>V₁ = 4.3 mL (rounded to two significant digits)</u>
<u>Therefore, the volume of the concentrated nitric acid taken: V₁ = 4.3 mL</u>
Answer: D. The depth of the water does not affect the level at which a cargo ship floats.
Answer:
Scheme is Attached.
When 3,5 dimethyl-4- octene is react with ozone two products are obtain.
2-Methyl butanal and 2 pentanon.
The complete reaction is given in attached file.
Answer:
d. soil that is always frozen
Explanation:
Permafrost is the layer of ground that remains frozen the complete year. Soil, rocks and sediments collectively together forms the permafrost. Such soil may remain frozen for a period of two or more than two years. A large part of the Earth's surface has been covered by the layer of permafrost. These are found mainly near the high mountains and especially near North and South poles.