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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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Necesito saber esto porfavor, ¿ cuales son las ventajas que representan los espectroscopia en cuanto al estudio de los elementos
igomit [66]

Answer:

Por favor,no ponga exactamente lo que pongo,Trate de parafrasear.

La espectroscopia es el estudio de la interacción entre la materia y la radiación electromagnética en función de la longitud de onda o frecuencia de la radiación. La espectroscopia puede ser muy útil para ayudar a los científicos a comprender cómo un objeto como un agujero negro, una estrella de neutrones o una galaxia activa produce luz, qué tan rápido se mueve y de qué elementos está compuesto. Se pueden producir espectros para cualquier energía de la luz, desde ondas de radio de baja energía hasta rayos gamma de muy alta energía.

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2 years ago
Biomes Graphic Organizer
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Answer/Explanation:

Refer to picture below

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2 years ago
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What is a product for 4 reaction type?
Crank

Answer:

1= 2H₂ + O₂ → 2H₂O

2=CaCo₃ + heat → CaO +CO₂

3=CH₄ + 2O₂   → CO₂ +2H₂O

4=HCl + NaOH   → NaCl + H₂O

Explanation:

1 = Simple composition

The formation of water molecule is simple composition reaction. In this reaction two hydrogen atoms react with one oxygen atom and form one water molecules.

2H₂ + O₂ → 2H₂O

The amount of energy released is -285.83 KJ/mol. It is exothermic reaction.

2 = Simple decomposition reaction:

The break down of sodium hydrogen carbonate into sodium carbonate, carbondioxide and water is decomposition reaction. The decomposition reactions re mostly endothermic, because compound required energy to break.

2NaHCO₃ + heat → Na₂CO₃ + H₂O + CO₂

It is endothermic reaction.

Another example is:

CaCo₃ + heat → CaO +CO₂

3 = Combustion reaction

Consider the combustion of methane:

CH₄ + 2O₂   → CO₂ +2H₂O

The burning of methane is exothermic. The combustion reactions are exothermic because when fuel are burns they gives energy.

4 = Neutralization reaction

The neutralization reactions are those in which acid and base react to form the salt and the water. Some neutralization reactions are exothermic because they release heat. e.g

Consider the neutralization reaction of HCl and NaOH.

HCl + NaOH   → NaCl + H₂O

6 0
3 years ago
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8 0
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A 10​-liter ​[l] flask contains 1.4 moles​ [mol] of an ideal gas at a temperature of 20 degrees celsius ​[degrees​c]. What is th
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The pressure in the flask is 3.4 atm.

<em>pV</em> = <em>nRT </em>

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<em>p</em> = (<em>nRT</em>)/<em>V</em> = (1.4 mol × 0.082 06 L·atm·K⁻¹mol⁻¹ × 293.15 K)/10 L = 3.4 atm

4 0
3 years ago
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