4 years ago

Which statement explains why meiosis haploid cells rather than diploid cells

1 answer:

4 0

In meiosis there are haploid cells because two cells are being combined to make one, while in mitosis there are diploid cells because they are splitting apart.

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The pH of a 0.23M solution of acrylic acid HC3H3CO2 is measured to be 2.44. Calculate the acid dissociation constant Ka of acryl

belka [17]

Answer:

Kₐ = 5.7 x 10⁻⁵

Explanation:

The equilbrium for this acid is

HC₃H₃CO₂ + H2O ⇄ H₃O⁺ + C₃H₃CO₂ ⁻ ,

and the equilibrium constant for acrylic acid is given by the expression:

Kₐ = [ H₃O⁺][ C₃H₃CO₂⁻ ] / [ HC₃H₃CO₂ ]

Since the pH of the 0.23 M solution is known , we can calculate [ H₃O⁺].

The ][ C₃H₃CO₂⁻ ] is equal to [ H₃O⁺] from the above equilibria (1:1)

Finally [ HC₃H₃CO₂ ] is known.

pH = - log [ H₃O⁺]

taking antilog to both sides of the equation

10^-pH = [ H₃O⁺]

Substituting

10^-2.44 = [ H₃O⁺] = 3.6 x 10⁻³

[ C₃H₃CO₂⁻ ] = 3.6 x 10⁻³

Kₐ = ( 3.6 x 10⁻³ ) /0 .23 = 5.7 x 10⁻⁵

7 0

3 years ago

Which of the following questions will allow you to determine if a population of organisms are MOST LIKELY a result of natural or

Marysya12 [62]

Answer:c

Explanation:

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3 years ago

The decomposition of ozone in the upper atmosphere to dioxygen occurs by a two-step mechanism.The first step is a fast reversibl

alex41 [277]

Answer: Step 2 in the given mechanism is the rate determining step

Explanation:

In a mechanism of the reaction, the slow step in the mechanism determines the rate of the reaction.

The intermediate reaction of the mechanism follows:

Step 1: $O_3(g)\rightleftharpoons O_2(g)+O(g);\text{ (fast)}$

Step 2: $O_3(g)+O(g)\rightarrow 2O_2(g);\text{(slow)}$

As, step 2 is the slow step. It is the rate determining step

Rate law for the reaction follows:

$\text{Rate}=k[O_3][O]$

Hence, step 2 in the given mechanism is the rate determining step

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4 years ago

This is when an organism like insects or plants become trapped in amber

BigorU [14]

thats very nice lol, things stuck in amber are very cool

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3 years ago

Glucose (molar mass=180.16 g/mol) is a simple, soluble sugar. Glucose solutions are used to treat patients with low blood sugar.

trasher [3.6K]

Do you still need this answer?

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4 years ago