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lord [1]
3 years ago
12

In a plant, roots absorb water and nutrients. Those materials are then transported to other parts of the plant. Which statements

describe the system in an animal that functions in a similar way? Choose all answers that are correct. A. An animal's blood moves nutrients throughout the animal's body like water in a plant's system moves nutrients. B. Nutrients are moved in a plant by water, like the hormones that move nutrients throughout an animal's body. C. The endocrine system transports materials throughout the animal's body. D. The responsibilities of transporting materials throughout the animal's body are done by the circulatory system.
Chemistry
2 answers:
Fiesta28 [93]3 years ago
8 0
C is the correct anwser 
sattari [20]3 years ago
8 0

A and C are the correct answers to this problem

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Define the term valence electron and explain how to find the number of valence electrons in family one and family 2.
goblinko [34]
Valence Electron is the outermost electrons, family(Alkali) 1 has 1 valence electrons and family(Alkaline) 2 has 2 valence electrons.

Hope this helps
8 0
3 years ago
Please help <br><br> 19.0 kg/0.021 m^3
irina1246 [14]

Answer:

904.8 kg / m3

Explanation:

19.0 kg/0.021 m^3 = 904.761905 kg / m3

6 0
2 years ago
PLZ HELP ME !!! PLZ. What is N for silicon tetrachloride, SiCl4?
den301095 [7]

Answer:To find S, the number of shared

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S = N-A

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4 0
3 years ago
Which of the following are considered pure substances?
Helen [10]
B.Elements

Explanation: they cannot be separated
8 0
3 years ago
A scientist prepared an aqueous solution of a 0.45 M weak acid. The pH of the solution was 2.72. What is the percentage ionizati
aleksandr82 [10.1K]

Answer:

0.42%

Explanation:

<em>∵ pH = - log[H⁺].</em>

2.72 = - log[H⁺]

∴ [H⁺] = 1.905 x 10⁻³.

<em>∵ [H⁺] = √Ka.C</em>

∴ [H⁺]² = Ka.C

∴ ka = [H⁺]²/C = (1.905 x 10⁻³)²/(0.45) = 8.068 x 10⁻⁶.

<em>∵ Ka = α²C.</em>

Where, α is the degree of dissociation.

<em>∴ α = √(Ka/C) </em>= √(8.065 x 10⁻⁶/0.45) = <em>4.234 x 10⁻³.</em>

<em>∴ percentage ionization of the acid = α x 100</em> = (4.233 x 10⁻³)(100) = <em>0.4233% ≅ 0.42%.</em>

4 0
3 years ago
Read 2 more answers
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