Answers
Answer:
Explanation:
Although there are no actual solutions to the effects caused by poison ivy, there are still various different treatments that can help alleviate the symptoms. Sodium bicarbonate is a base that will increase pH. An increase in pH will cause the catechol to ionize. A charged substance will be more soluble in water. Soap helps with the solubility of the long alkyl chain. Another very helpful treatment would be to rub alcohol on the affected area, this can remove the urushiol oil from the skin, helping to minimize discomfort
Related Questions
1. In a hydrogen fuel cell, hydrogen gas and oxygen gas are combined to form water. (1) Write the balanced chemical equation describing this reaction using the lowest whole number coefficients. (2) Identify the oxidizing agent and reducing agent. (3) Determine the number of electrons transferred in the balanced chemical equation
The rate constant for a certain reaction is k = 6.50×10−3 s−1 . If the initial reactant concentration was 0.600 M, what will the concentration be after 3.00 minutes?
Calculate the molarity of a solution that contains 0.50 g of NaCl dissolved in 100mL of solution?
Which of the following is an example of scientific inference
Answers
Answer: Lithium and Ethanol
Explanation: As lithium and ethanol both have a density of under
1.000g/ml, they can be supported by the water. Blood and Magnesium are denser than the water and will therefore sink as the water can not support it them.
Answers
Ans: Distance = 16.1
Let us consider point A with coordinates (x1,y1) and point B with coordinates (x2,y2)
The distance between the two points is given as:
d(A,B) = √(x2-x1)² + (y2-y1)²
Here: (x1,y1) = (-6,2)
(x2,y2) = (8,10)
d = √(8-(-6))² + (10-2)²
= √196+64 = √260 = 16.1
The distance between (–6, 2) and (8, 10) is 2√65
Distance Formula
The distance formula is used to calculate the distance between two points(x₁, y₁)(x₂, y₂).
Therefore,
- d = √(x₂ - x₁)²+(y₂ - y₁)²
x₁ = -6
x₂ = 8
y₁ = 2
y₂ = 10
Therefore,
d = √(8+6)²+(10-2)²
d = √(14)² + (8)²
d = √196 + 64
d = √260
d = √4 × 65
d = 2√65
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k= 1.5
[A] = 1 M
[B] = 3 M
m = 2
n = 1
Answers
The rate of the reaction is 4.5 mol L⁻¹s⁻¹.
What is meant by rate of a reaction ?
Rate of a reaction is defined as the change in concentration of any one of the reactants or products of the reaction, in unit time.
Here,
The concentration of A, [A] = 1 M
The concentration of B, [B] = 3 M
The partial order with respect to A, m = 2
The partial order with respect to B, n = 1
The rate constant of the reaction, k = 1.5
The rate of the reaction,
r = k[A]^m [B}^n
r = 1.5 x 1² x 3
r = 4.5 mol L⁻¹s⁻¹
Hence,
The rate of the reaction is 4.5 mol L⁻¹s⁻¹.
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Answer:
k= 1.5
[A] = 1 M
[B] = 3 M
m = 2
n = 1
Explanation:
rate = k[A]”[B]"
Answers
Answer:
Redox reactions involve an oxidation reaction coupled with a reduction reaction.
Explanation:
A redox reaction is called like that because it involves a substance that is reducing and a substance that is oxidating, so it is Re-dox, this means that all of the chemicals reactions that involve a substance that looses an electron, are redox reactions, they are present in almost all of chemistry, from syntetic to biological chemistry, so the only correct option would be:
Redox reactions involve an oxidation reaction coupled with a reduction reaction.
Answer: An oxidation reaction is defined as the when in a reaction the oxidation number of a species involved increased, and reduction reaction is reversed, it when the oxidation number of a species is decreased. And a redox reaction is in which both of oxidation and reduction reaction takes place simultaneosly. Because chemical reaction follows the law of conservation of mass.
Organisms with traits that help them survive and reproduce in their environment pass on those traits.
Changes in the environment cause organisms to change.
Organisms naturally select traits that help them survive and reproduce
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In an ecosystem, organisms evolve to make changes to help them survive and reproduce in their environment.
What is an ecosystem?
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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Molar mass of the weak base = 82.0343g/mole.
Note: pKa = -logKa
pKb = -logKb
pH + pOH = 14
[H+ ] [OH- ] = 10^-14
Answers
Answer:
11.39
Explanation:
Given that:
Given that:
Mass = 1.805 g
Molar mass = 82.0343 g/mol
The formula for the calculation of moles is shown below:
Thus,
Given Volume = 55 mL = 0.055 L ( 1 mL = 0.001 L)
Concentration = 0.4 M
Consider the ICE take for the dissociation of the base as:
B + H₂O ⇄ BH⁺ + OH⁻
At t=0 0.4 - -
At t =equilibrium (0.4-x) x x
The expression for dissociation constant is:
x is very small, so (0.4 - x) ≅ 0.4
Solving for x, we get:
x = 2.4606×10⁻³ M
pOH = -log[OH⁻] = -log(2.4606×10⁻³) = 2.61
pH = 14 - pOH = 14 - 2.61 = 11.39