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3 years ago

Can Asexual reproduction involves 3 parents ?

Chemistry

1 answer:

Zina [86]3 years ago

5 0

Answer:

Explanation:Asexual reproduction involves one parent and produces offspring that are genetically identical to each other and to the parent. Sexual reproduction involves two parents and produces offspring that are genetically unique.

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What would happen if an organ in the specific organ system stopped working

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You die if it’s a vital organ

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3 years ago

PLZ HELP!!! Of the four examples listed below, which describe a chemical change?

Ad libitum [116K]

Question 1) Vaporization

2) Freezing

3) Mixture.

4) Sublimation

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3 years ago

The plant on the left is growing more because it has been receiving more water

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Answer:

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3 years ago

Which of the following is an example of a PHYSICAL change?

Nezavi [6.7K]

Rust on a nail is a chemical change.

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3 years ago

A mysterious white powder could be powdered sugar (C12H22O11), cocaine (C17H21NO4), codeine (C18H21NO3), norfenefrine (C8H11NO2)

konstantin123 [22]

Answer: norfenefrine $(C_8H_{11}NO_2)$

Explanation:

Depression in freezing point is given by:

$\Delta T_f=i\times K_f\times m$

$\Delta T_f=T_f^0-T_f=(-114.6-(-115.5)^0C=0.9^0C$ = Depression in freezing point

i= vant hoff factor = 1 (for non electrolyte)

$K_f$ = freezing point constant = $1.99^0C/m$

m= molality

$\Delta T_f=i\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}}\times \text{weight of solvent in kg}}$

Weight of solvent (ethanol)= $density\times volume=0.789g/cm^3\times 1.50cm^3=1.18g=1.18\times 10^{-3}kg$

Molar mass of unknown non electrolyte = M g/mol

Mass of unknown non electrolyte added = 82 mg = 0.082 g (1g=1000mg)

$0.9=1\times 1.99\times \frac{0.082g}{M g/mol\times 1.18\times 10^{-3}}kg}$

$M=154g/mol$

The molecular mass of norfenefrine $(C_8H_{11}NO_2)$ is near to 154 and thus the identity of the white powder is norfenefrine .

4 0

3 years ago