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andrezito [222]
2 years ago
7

A student wants to prepare 250.0 mL of a 0.754 M HCl solution, starting with a 11.7 M HCl solution. How much of the 11.7 M HCl s

olution is needed
Chemistry
1 answer:
grin007 [14]2 years ago
5 0
See answer in photo

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What happens when nitrogen and hydrogen comes in contact at high temperature and pressure in presence of iron powder and molybde
Sidana [21]

Answer:

<h2>Ammonia Gas</h2>

Explanation:

It result in formation of ammonia gas.

N2 + 3H2 ---<u>iron</u><u>/</u><u>molybdenum</u><u>/</u><u>high</u><u> </u>temp/pres--- > 2 NH3

It forms ammonia gas.

Please mark branliest if you are satisfied with the answer. Thanking in anticipation.

6 0
3 years ago
Un átomo neutro tiene número atómico 1 y número másico 3. Indica cuántos protones, neutrones y electrones tiene.
ahrayia [7]

Answer:

El átomo podes 1 protón, 1 electrón y 2 neutrones.

Explanation:

Cada elemento químico se caracteriza por el número de protones de su núcleo, que se denomina número atómico Z. Es decir, el número atómico​ de un elemento químico es el número total de protones que tiene cada átomo de ese elemento.

Los protones poseen carga positiva y se encuentran en el núcleo, en torno al cual se mueven otras partículas con carga eléctrica negativa que son los electrones. Así, el átomo es eléctricamente neutro, ya que la carga positiva de los protones está compensada por la carga negativa de los electrones.  Entonces, en todo átomo neutro el número de protones del núcleo es igual al de electrones de sus orbitales.

En este caso, un átomo neutro tiene número atómico 1. Entonces la cantidad de protones y electrones presentes en el átomo es 1.

En el núcleo de cada elemento, además de protones, también es posible encontrar neutrones, cuyo número puede variar. La masa atómica (A) se obtiene sumando el número de protones y de neutrones de un núcleo determinado:

Número másico (A) = número de protones + número de neutrones

En este caso, el átomo neutro posee 1 protón y su número másico es 3. Entonces:

3= 1 + número de neutrones

Resolviendo:

3 - 1= número de neutrones

2= número de neutrones

Entonces,<u><em> el átomo podes 1 protón, 1 electrón y 2 neutrones.</em></u>

6 0
3 years ago
8. As the temperature of a mixture increases, one part of the mixture may 2 points
disa [49]

Answer:

It's false

Explanation:

Mixtures are always combinations of the same compounds that are at different states.

8 0
3 years ago
What are electron configurations?
sweet-ann [11.9K]

electron configuration is the arrangement of electrons in an atom, molecule, or other physical structure (e.g., a crystal).

3 0
3 years ago
A substance that reduces the hydrogen ion concentration of a solution is __________.
ioda

A substance that reduces the hydrogen ion concentration of a solution is  <u>base</u>.

A base which thus completely dissociates in an aqueous solution is referred to as a strong base. These substances produce one or more hydroxide ions (OH-) per base molecule when they ionize in water. A weak base, on the other hand, only partially splits into its water-soluble ions.

The three definitions of "base" used in chemistry are Arrhenius base, Bronsted base, as well as Lewis base. The fact instead that bases react towards acids is acknowledged by all base definitions.

Therefore, a substance that reduces the hydrogen ion concentration of a solution is <u>base</u>.

To know more about hydrogen ion

brainly.com/question/5327882

#SPJ4

8 0
2 years ago
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