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Lisa [10]
3 years ago
15

Why is it important to you to know whether a substance can dissolve in water or not?

Biology
1 answer:
fredd [130]3 years ago
3 0

Answer:

So I don't acidentally put anything in water that can dissolve I guess

You might be interested in
Radioactivity was discovered around what year?
RideAnS [48]
Radioactivity was discovered in 1896
6 0
3 years ago
Why is VRBA (Violet red bile agar) only pasteurized rather than sterilized prior to use?
Georgia [21]

Answer:

Explanation:

This is because Violet and red bike is only a selective medium that detect and analyse lactose coliform microorganisms that cause fermentation and this is present in diary products like milk. This is milk use for microbiological analysis of milk because of it ability to detect lactose which is a milk sugar. There fore it cannot be use for sterilization.

4 0
3 years ago
The anterior portion of the body of most annelids, such as the earthworm, is adapted for sensing the environment.
Diano4ka-milaya [45]

Answer:

The answer is False. Although sensitive cells are <u>more abundant</u> in the <u>anterior portion</u> of the annelid´s body, in general, they are arranged in all the segments.

Explanation:

Annelids, such as the earthworm, have a variety of sensory cells:    

  • <u>Mechanoreceptors</u>, disposed of in groups in <em><u>each segment</u></em> of their body.  
  • <u>Photoreceptors</u>: Light-sensitive cells. Although they are <em><u>located in the whole </u></em>body, they are <em><u>abundant in anterior and posterior segments</u></em>, concentrated in the intern and dorsal part of the epidermis.
  • <u>Humidity receptors</u> are the most sensitive cells and are <u>located in the first segments</u> of the earthworm body
  • <u>Chemoreceptors</u>: sensorial cells cumulus forming a prominent tubercle with prolongations that extends through the cuticle. These tubercles form three rings <em><u>in each segment</u></em> but are especially <em><u>abundant in the anterior part</u></em> of the body.

The tegument is very rich in free nervous terminations, which functions might be tactile.

6 0
3 years ago
Una solución de 0.204 M de NaOH seutiliza para neutralizar 50 mL de una solución de H3PO4. Si se necesitaron 16.4 mL de la soluc
vfiekz [6]

Answer: 0.05 M

Explanation:

Para responder esta pregunta, hay que tener en cuenta la Ley de Conservación de la Masa. <u>La misma indica que en una reacción química en un sistema cerrado, la masa total de las moléculas que participan permanece constante.</u> Esto significa que la masa utilizada en los reactivos es la misma que la masa de los productos generados.

En este problema, se cuenta con una solución de NaOH (hidróxido de sodio) tiene una molaridad de 0.204 (siendo la molaridad el número de moles por litro de solución) y se utilizan 16.4 mL de dicha solución para agregarla a 50 mL de una solución de H3PO4 (ácido fosfórico).

Entonces, ya que la masa de ambas soluciones no se pierde, podemos utilizar la ecuación de la Ley de Conservación de la Masa:

Concentración inicial x Volumen inicial = Concentración final x Volumen final.

Concentración inicial: 0.204 M

Volumen inicial: 16.4 mL

Concentración final: ?

Volumen final: 50 mL + 16.4 mL = 66.4 mL

Reemplazamos los valores en la ecuación:

0.204 M x 16.4 mL = Concentración final x 66.4 mL

La molaridad de la solución de H3PO4 es de 0.05 M.

7 0
3 years ago
Does anyone know im trying to answer this but im not sure
Andrew [12]
I think your answer is D
8 0
3 years ago
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