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Akimi4 [234]
3 years ago
12

Eukaryotic plant and animal cells each have distinguishing characteristics. For example, plant cells have cell walls, while anim

al cells do not. Which statement BEST elaborates on the reason for this difference?
A) Cell walls help plants make their own food by converting light energy. Animals do not make their own food.
B) Animal cells use oxygen, and it cannot pass through cell walls. Plant cells do not need oxygen to pass through.
C) Animal cells produce waste, and a wall would prevent it from leaving the cell. Plant cells do not produce waste.
D) Cell walls of plant cells give plants their rigid shapes, while lack of cell walls allows for mobility in animals.
Chemistry
2 answers:
kolezko [41]3 years ago
3 0

Answer: well the answer is a

Explanation: how because I did that

Eduardwww [97]3 years ago
3 0
Answer: It is A




Explain: it is A because I did the test and I got it right and if it is wrong try B your welcome hope you’ll have a great day
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Which of the following would increase the strength of an electromagnet? Check all that apply.
TiliK225 [7]

Answer: The correct statements are ; A and B.

Explanation:

The strength of the magnetic field(B) in an electromagnet can be calculated using formula:

B=\mu\frac{N}{L}I

\mu = Relative permeability

N = number of turns

I = Current in the wire of the solenoid

L = length of the solenoid or electromagnetic

As we can see from the formula:

B\propto N

B\propto I

So, by increasing the turns and increasing current flowing through wire one can increase the strength of an electromagnet.

Hence, the correct statements are ; A and B.

5 0
3 years ago
How many atoms are in 12 moles of silver?
lord [1]

Answer:

NA=72.264x1023

Explanation:

I got you

7 0
3 years ago
A CO2 fire extinguisher is used for which type of fire?
zlopas [31]

Answer:

Carbon Dioxide fire extinguishers extinguish fire by taking away the oxygen element of the fire triangle and also be removing the heat with a very cold discharge. Carbon dioxide can be used on Class B & C fires. They are usually ineffective on Class A fires

5 0
3 years ago
Read 2 more answers
At 25°C and constant pressure, carbon monoxide gas combines with oxygen gas to give carbon dioxide gas with the evolution of 10.
stealth61 [152]

Answer : The value of \Delta H for the reaction is, -565.6 kJ

Explanation :

First we have to calculate the molar mass of CO.

Molar mass CO = Atomic mass of C + Atomic mass of O  = 12 + 16 = 28 g/mole

Now we have to calculate the moles of CO.

\text{Moles of }CO=\frac{\text{Mass of }CO}{\text{Molar mass of }CO}=\frac{1g}{28g/mole}=\frac{1}{28}mole

Now we have to calculate the value of \Delta H for the reaction.

The balanced equation will be,

2CO(g)+O_2(g)\rightarrow 2CO_2(g)

From the balanced chemical reaction we conclude that,

As, \frac{1}{28}mole of CO release heat = 10.1 kJ

So, 2 mole of CO release heat = 2\times 28\times 10.1=565.6kJ

Therefore, the value of \Delta H for the reaction is, -565.6 kJ (The negative sign indicates the amount of energy is released)

4 0
3 years ago
What kind of reaction is AgNO3+KI —> AgI+KNO3?
Scilla [17]

Answer:

Substitution reaction

5 0
3 years ago
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