Answer:
The timber companies removing all the trees from entire hillside when they are harvesting logs is a practice that could cause the following when it is time to plant in spring:
1. It could affect the quality of plant needed nutrients in the soil and beneficial microorganism population in the soil which could impact negatively the planting season.
2. Trees serves as protection of soil nutrients against wind erosions, so the soil nutrients would be affected.
The farmers tilling the soil means preparing the soil for a farming season as the following effect:
1. Helps control weed for the planting season.
2. This practice could further encourage soil erosion if not done well.
3. Tilling the soil could make leftover plants from the felling of trees mix well with the soil and also add nutrients to the soil when they decay.
They would die, oxygen benefits essential parts of the brain such as heart and brain
Answer:
- <em>The molecular formula </em>is C₃H₆
Explanation:
<u>1) Assume 100 g of substace:</u>
- Carbon, C: 85.64% × 100 g = 85.64 g
- Hydrogen, H: 14.36% × 100 g = 14.36 g
<u>2) Convert the masses in grams to number of moles</u>
- moles = mass in grams / atomic mass
- atomic mass of C: 12.011 g/mol
- atomic mass of H: 1.008 g/mol
Calculations:
- C: 85.64 g / 12.011 g/mol = 7.130 mol
- H: 14.36 g / 1.008 g/mol = 14.25 mol
<u>3) State the ratio of moles.</u>
Divide the number of moles of each element by the least number of moles:
- C: 7.130 mol / 7.130 mol = 1.0 mol
- H: 14.25 mol / 7.130 mol = 2.0 mol
<u>4) Set the empirical formula:</u>
<u>5) Calculate the mass of one mol of the empirical formula:</u>
- CH₂: 12.011 g/mol + 2× 1.088 g/mol = 14.027 g/mol
<u>6) Calculate how many times the mass of the empirical formula is contained in the mass of the molecular formula:</u>
- 42.08 g / 14.027 g = 2.9999 = 3
<u>7) Set the molecular formula:</u>
Multiply each subscript of the empirical formula by the previos ratio: 3
<u>Conclusion</u>: <em>the molecular formula is</em> C₃H₆
<h3>Answer:</h3>
Option-C: HCl + H₂O → H₃O⁺ + Cl⁻
Explanation:
Bronsted-Lowery concept of Acid and Base defines Acid as that specie which tends to donate H⁺ (Hydrogen Ion) and bases are those species which accepts H⁺ from Acids.
In selected option, HCl is reacting as Acid as it donates H⁺ to water (lowery bronsted base).
Also, the correspong acid is converted into conjugate base (i.e. Cl⁻) and base is converted into conjugate acid (i.e. H₃O⁺)