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3 years ago

Cuál es la definición de un átomo?

1 answer:

4 0

Answer:El átomo es una unidad básica de materia que consiste en un núcleo central denso rodeado por una nube de electrones cargados negativamente.

Explanation:

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draw the structure of a compound with the formula c9h20 that has two non-adjacent chirality centers, both r.

4vir4ik [10]

Answer:

Explanation:

6 0

1 year ago

Which is the correct chemical formula for silicon dioxide?

Arlecino [84]

The answer is C. SiO2 :)))

5 0

2 years ago

Use the reaction below for the decomposition of sodium azide

bezimeni [28]

<u>Answer:</u> The volume of nitrogen gas at STP is 44.8 L.

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation for it follows:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ...(1)

We are given:

Given mass of $NaN_3$ = 130.0 g

Molar mass of $NaN_3$ = 65.01 g/mol

Using equation 1:

$Moles of NaN_3=\frac{130.0 g}{65.01g/mol}=2mol$

For the given chemical equation:

$2NaN_3(s) \rightarrow 2Na(s) + 3N_2(g)$

By the stoichiometry of the reaction:

2 moles of $NaN_3$ produces 3 moles of nitrogen gas

At STP:

1 mole of a gas occupies 22.4 L of volume

So, 2 moles of nitrogen gas will occupy $=\frac{22.4L}{1mol}\times 2mol=44.8L$ of volume

Hence, the volume of nitrogen gas at STP is 44.8 L.

8 0

2 years ago

HELP MEEEEEEEEEEEEEEEEEEEEEEEE

serg [7]

They have the same number of protons and electrons

3 0

3 years ago

How many phosphorus atoms are represented in the formula?

Virty [35]

Answer:

i believe 4

Explanation:

hope this helps :)

7 0

2 years ago

Read 2 more answers