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Sveta_85 [38]
2 years ago
12

4

Chemistry
2 answers:
Masteriza [31]2 years ago
5 0
The answer is D. The teacher describes the plant by saying it has leaves, stems, roots, and fruit. stems are vascular tissue so it can't be C, B, or A.
Alja [10]2 years ago
3 0

Answer:

D.  flowering plant

Explanation:

<em>Option A is incorrect because moss is a thalloid plant with no true plant body.</em>

<em>Option B is incorrect because the plant could not have produced fruits without flowering.</em>

<em>Option C is incorrect because ferns do not produce fruits.</em>

The correct option is D. Flowering plants produce fruits and posses true leaves, stems and roots. The ovule of the flower becomes the seed after fertilization and the ovary becomes the fruit.

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What is the scientific name of water<br>​
spayn [35]

Answer:

Dihydrogen monoxide is one of the scientific names of water having the formula H2O, where H2 "dihydrogen" is a double hydrogen (Latin Hydrogenium — hydrogen), and O is "monoxide" (oxygen).

5 0
3 years ago
Read 2 more answers
Acetic acid has a pKa of 4.74. Buffer A: 0.10 M HC2H3O2, 0.10 M NaC2H3O2 Buffer B: 0.30 M HC2H3O2, 0.30 M NaC2H3O2 Buffer C: 0.5
e-lub [12.9K]

Answer:

Buffer B has the highest buffer capacity.

Buffer C has the lowest buffer capacity.

Explanation:

An effective weak acid-conjugate base buffer should have pH equal to pK_{a} of the weak acid. For buffers with the same pH, higher the concentrations of the components in a buffer, higher will the buffer capacity.

Acetic acid is a weak acid and CH_{3}COO^{-} is the conjugate base So, all the given buffers are weak acid-conjugate base buffers. The pH of these buffers are expressed as (Henderson-Hasselbalch):

pH=pK_{a}(CH_{3}COOH)+log\frac{[CH_{3}COO^{-}]}{[CH_{3}COOH]}

pK_{a}(CH_{3}COOH)=4.74

Buffer A:    pH=4.74+log(\frac{0.10}{0.10})=4.74

Buffer B:   pH=4.74+log(\frac{0.30}{0.30})=4.74

Buffer C:   pH=4.74+log(\frac{0.10}{0.50})=4.04

So, both buffer A and buffer B has same pH value which is also equal to pK_{a} . Buffer B has higher concentrations of the components as compared to buffer A, Hence, buffer B has the highest buffer capacity.

The pH of buffer C is far away from pK_{a} . Therefore, buffer C has the lowest buffer capacity.

     

6 0
2 years ago
Thermal energy is __________.
Gekata [30.6K]

Answer:

Thermal energy (also called heat energy) is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.

Credit:

https://www.solarschools.net/knowledge-bank/energy/types/thermal

5 0
3 years ago
Read 2 more answers
Some types of bar soap will float in water. What are the dispersed particles?
Sergio039 [100]

Answer:

cell's

Explanation:

3 0
2 years ago
Read 2 more answers
Where in the mitochondria does the electron transport chain occur
wolverine [178]
I think it’s the inner membrane
6 0
2 years ago
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