The decay and compression of organic material millions of years ago resulted in extremely fertile soil that helped large rain forests to grow. This describes the way energy and matter are recycled within an ecosystem. This organic material goes into the ground, feeds it, and in turn makes it fertile so that various types of trees and plants can grow from it.
244.4 degrees farenheit. (118 degrees celsius)
Caused by the earths tilt
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>
<h3><u>Answer</u>;</h3>
Chlorine forms one covalent bond and oxygen forms two covalent bonds
<h3><u>Explanation</u>;</h3>
- Covalent bond is a type of bond the occur when non-metal atoms share electrons. Covalent atom may occur between two atoms in a molecule.
- Diatomic molecule is a molecule consisting of two atoms. Halogens such as chlorine exist as diatomic gases by forming covalent bonds.
- <em><u>Single covalent bond occurs when two atoms held together by sharing a pair of electrons, for example in diatomic molecules such as chlorine.</u></em>
- <em><u>Double covalent bond is a bond that involves two shared pairs of electrons for example in oxygen molecule.</u></em> Triple covalent bond on the other hand is a bond formed by sharing three pairs of electrons between atoms, like in the case of nitrogen molecule.