Answer:
This work was done in the European plum (Prunus domestica). The gene for PPV coat protein was separated from the PPV virus and inserted into the plum DNA, which was then regenerated and grown into complete plum trees. These trees now had the additional gene in their DNA and became resistant to PPV.
Local winds are mall scale convective winds of local
origin caused by temperature differences. Prevailing winds are winds that blow
predominantly from a single general
direction over a particular point on the Earth’s surface.
Answer: With the help of a narrow beam of light, a glass prism, and a white wall it is possible to produce the band of seven colors using white light.
Explanation: White light is called as white because it consists of seven colors. The sunlight splits into seven colors namely violet, indigo, blue, green, orange, and red.
The pH can be determined by the base dissociation constant value (Kb). The pH of the solution after 15 mL of ammonia is added to the solution will be 10.26.
<h3>What is pH?</h3>
The pH of the solution can be given by the pOH value that is determined by the concentration and the base dissociation constant.
The balanced chemical reaction is given as,
HCl + NH₃ → NH₄Cl
The moles before reaction was 0.015L× 0.15M = 0.00225 moles and, 0.025 L × 1.00 M = 0.025 moles
The moles after reaction are 0.00225 moles - 0.025 moles = 0.02275 moles
pOH is calculated as,
pOH = 4.74 + log ( 0.00225 ÷ 0.02275 )
= 3.73
Further pH is calculated as,
pH = 14 - 3.73
= 10.26
Therefore, 10.26 is the pH of the solution.
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Answer:
0.05142 M
Explanation:
Let's consider the neutralization reaction between KHP and NaOH.
KHC₈H₄O₄ + NaOH → H₂O + NaKC₈H₄O₄
12.39 mL of 0.04150 M NaOH were required for the neutralization. The moles that reacted are:
12.39 × 10⁻³ L × 0.04150 mol/L = 5.142 × 10⁻⁴ mol
The molar ratio of KHP to NaOH is 1:1. The moles of KHP that reacted are 5.142 × 10⁻⁴ mol.
5.142 × 10⁻⁴ moles of KHP were in 10 mL of solution. The concentration of the KHP solution is:
5.142 × 10⁻⁴ mol / 10 × 10⁻³ L = 0.05142 M