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3 years ago

A disadvantage of sexual reproduction is that

1 answer:

8 0

The disadvantage of sexual reproduction is that outside influences can determine the viability of the offspring. In humans, for example, a failure for a mother to consume an adequate amount of folic acid is directly linked to neural tube birth defects. This defect occurs at the earliest stages of development, often when a woman doesn’t know she is pregnant, which means the folic acid must be consumed when attempting to conceive.

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Which of the following has the lowest Ka?a. carbonic acid b. dihydrogen phosphate c. phosphoric acid d. bicarbonate

Naya [18.7K]

Explanation:

A compound or molecule which will have least dissociation and that is not able to given hydrogen ion easily upon dissociation will also have a low value of $K_{a}$ .

Dissociation of the given compounds or species will be as follows.

$H_{2}CO_{3} \rightleftharpoons H^{+} + HCO^{-}_{3}$

$H_{2}PO^{-}_{4} \rightleftharpoons H^{+} + HPO^{-}_{4}$

$H_{3}PO_{4} \rightleftharpoons H_{+} + H_{2}PO^{-}_{4}$

As, chemical formula of bicarbonate is $HCO^{-}_{3}$ and due to the presence of a negative charge it is difficult to lose a positively charged hydrogen ion. This is because oppositely charged ions will be bonded by strong force of attraction.

Hence, it will not easily lose a hydrogen ion due to which bicarbonate has the lowest $K_{a}$ .

Thus, we can conclude that out of the given species bicarbonate has the lowest $K_{a}$ .

7 0

3 years ago

How do biotic factors impact ecological organization?

love history [14]

Answer:

plz mark as BRAINLIEST plz

Explanation:

The biotic factors in an ecosystem are the living organisms, such as animals. Biotic factors in an ecosystem are the participants in the food web, and they rely on each other for survival. ... These living organisms affect each other and influence the health of the ecosystem.

3 0

4 years ago

How do isotopes affect the average atomic mass of an element?

kirill [66]

Answer:

The versions of an element with different neutrons have different masses and are called isotopes. The average atomic mass for an element is calculated by summing the masses of the element's isotopes, each multiplied by its natural abundance on Earth.

Explanation:

7 0

3 years ago

Calculate the molar mass of Ca3(PO4)2 934.32 g Ca3(PO4)2 =______ moles Ca3(PO4)2

Anastasy [175]

Answer:

Molar mass of Ca₃(PO₄)₂ = 310.18 g/mol

934.32 g Ca₃(PO₄)₂ = 3.01 moles Ca₃(PO₄)₂

Explanation:

The molar mass (MM) of Ca₃(PO₄)₂ can be calculated as follows:

MM of Ca₃(PO₄)₂ = (MM of Ca)*3 + [(MM of P) +(MM of O)*4]*2

MM of Ca₃(PO₄)₂ = 310.18 g/mol

Now we can convert 934.32 g of Ca₃(PO₄)₂ into moles:

934.32 g ÷ 310.18 g/mol = 3.01 moles

8 0

3 years ago

Glitter glue would be a…

sweet [91]

It is A. heterogeneous mix

5 0

3 years ago