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WITCHER [35]
2 years ago
6

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA HELP

Chemistry
2 answers:
skad [1K]2 years ago
7 0

Answer:

c

c

Explanation:

mark me brainliest pls

Naya [18.7K]2 years ago
5 0
Coco beans poops okkkkk
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Need answer asap, will give brainliest!!!
Pavlova-9 [17]

D

Molecules consist of multiple atoms put together to create a new form.

5 0
3 years ago
Determine the number of moles of C5H12 that are contained in 357.4 g of the compound.
AlladinOne [14]

Answer: 4.96 moles

Explanation:

C5H12 is the chemical formula for pentane, the fifth member of the alkane family.

Given that,

number of moles of C5H12 = ?

Mass in grams = 357.4 g

Molar mass of C5H12 = ?

To get the molar mass of C5H12, use the atomic mass of carbon = 12g; and Hydrogen = 1g

i.e C5H12 = (12 x 5) + (1 x 12)

= 60g + 12g

= 72g/mol

Now, apply the formula

Number of moles = Mass / molar mass

Number of moles = 357.4g / 72g/mol

= 4.96 moles

Thus, 4.96 moles of C5H12 that are contained in 357.4 g of the compound.

4 0
3 years ago
Cuando el oxígeno reacciona con el calcio produce un sólido blanco muy utilizado en la preparación de cementos. ¿Cuál de las sig
8_murik_8 [283]

Answer:

2Ca + O₂ → 2CaO

Explanation:

Cuando el Calcio (Ca) reacciona con oxígeno (O₂) se produce cal (CaO). La cal es un sólido inodoro de color blanco a grisáceo. La cal es un óxido que se encuentra presente en el cemento y su cuantificación permite determinar la calidad y el tipo de cemento a utilizar.

La reacción que describe el proceso anterior es:

Ca + O₂ → CaO

Para balancear los oxígenos, se deben poner 2 CaO como producto:

Ca + O₂ → 2CaO

Para balancear los calcios, se pone como coeficiente del Ca un 2:

<h3>2Ca + O₂ → 2CaO</h3><h3 />

Esta última es la reacción que describe el proceso anterior

6 0
3 years ago
When oxygen gains valence electrons during ionic bonding what charge
pishuonlain [190]

Answer:

O -2

Explanation:

8 0
3 years ago
Which of the following represents an ion?<br><br> a 4he<br> b Na 2+<br> c Ca<br> d Mg
liubo4ka [24]

Na2+(answer  B)  represent ions.


<h3>Explanation</h3>

This is because it has a charge of 2+. ion is formed when an  atom gain or lose  electrons.  when an atom lose electrons it form ion which is positively  charged . On the other hand when atom gain electrons it forms ion of negatively charged. Na2+  has a charge of 2+ since it loses two electrons.

7 0
3 years ago
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