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zubka84 [21]
3 years ago
15

(Science)

Chemistry
1 answer:
AlladinOne [14]3 years ago
8 0

Answer:

A

Explanation:

eons are divided into eras and eras are based on major events and can vary in time so eons can vary in time

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How many electrons in the 4 and 5th shell?
patriot [66]
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3 years ago
If 3.89 × 1024 atoms of a noble gas is collected and it has a mass of of 848 grams, this element is most likely a. He b. Ne c. A
bearhunter [10]

Answer:

Xenon

Explanation:

Avogadro’s number represent the number of the constituent particles which are present in one mole of the substance. It is named after scientist Amedeo Avogadro and is denoted by N_0.

Avogadro constant:-

N_a=6.023\times 10^{23}

Let the molar mass of the element is x g/mol

So,

6.023\times 10^{23} atoms have a mass of x g

Also,

3.89\times 10^{24} atoms have a mass of \frac{x}{6.023\times 10^{23}}\times 3.89\times 10^{24} g

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So,

\frac{x}{6.023\times 10^{23}}\times 3.89\times 10^{24}=848

x= 131.3 g/mol

This mass correspond to xenon.

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3 years ago
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In this double replacement reaction, which are the products? hcl + naoh —> ______?
Anarel [89]
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Specifically:
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    HCl + NaOH  —>  NaCl + H₂O  ;   or; write as:

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6 0
3 years ago
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