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Alexeev081 [22]
3 years ago
11

______ The total number of protons and neutrons in the nucleus.

Chemistry
1 answer:
MArishka [77]3 years ago
7 0

Answer:

A. Atomic Number

Explanation:

The mass number is used to calculate the number of neutrons & electrons in one atom of an element. In order to calculate the number of neutrons you must subtract the atomic number from the atomic mass.

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Which statement describes the BEST example of animals avoiding competition?
Svetlanka [38]

Answer:

D

Explanation:

If the deer leave the forest then they are avoiding compotation

4 0
3 years ago
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Consider the balanced chemical equation for the combustion of methane (CH4).
Mrac [35]
<h3>Answer:</h3>

                  89.6 L of O₂

<h3>Solution:</h3>

The balanced chemical equation is as,

                                CH₄  +  2 O₂    →    CO₂  +  2 H₂O

As at STP, one mole of any gas (Ideal gas) occupies exactly 22.4 L of Volume. Therefore, According to equation,

             44 g ( 1 mol) CO₂ is produced by  =  44.8 L (2 mol) of O₂

So,

                  88 g CO₂ will be produced by  = X L of O₂

Solving for X,

                        X = (88 g × 44.8 L) ÷ 44 g

                        X = 89.6 L of O₂

5 0
3 years ago
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What is the freezing point depression of a solution that contains 0.705?
Sveta_85 [38]
Colligative properties calculations are used for this type of problem. Calculations are as follows:<span>
</span>

<span>ΔT(freezing point)  = (Kf)m
ΔT(freezing point)  = 1.86 °C kg / mol (0.705)
ΔT(freezing point)  = 1.3113 °C

</span>

<span>
</span>

<span>Hope this answers the question. Have a nice day.</span>

6 0
3 years ago
Son las transformaciones que ocurren de un estado a otro de la materia, ocurren sin alterar la estructura molecular de la materi
Vladimir [108]

Los cambios de estado físico son transformaciones que ocurren de un estado de la materia a otro, sin cambiar la estructura molecular de la materia, es decir, sin transformarse en otras sustancias.

Los tres estados físicos básicos de la materia son:

  1. sólido,
  2. líquido y
  3. gaseoso.

Se puede decir que son diferentes solo por la organización de sus partículas, lo que determina su cambio de estado pero sin cambiar la estructura molecular.

Cualquier sustancia se puede encontrar en estos tres estados físicos, dependiendo de su temperatura y presión.

El aumento de temperatura hace que las moléculas se separen y el aumento de presión hace que se acerquen.

En estado sólido las partículas están más juntas, en el líquido se mueven más y en el gas están bien separadas.

Aprenda más aqui:

brainly.com/question/17104364

4 0
3 years ago
Can anyone please help?
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is it me bc i cant even see the page:?

5 0
3 years ago
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