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oksano4ka [1.4K]
2 years ago
14

A. Element X has a

Chemistry
1 answer:
vlabodo [156]2 years ago
8 0

The mass is written as a superscript and the charge is written as a subscript in the isotope notation of element X as follows \frac{292}{119} X.

The isotope notation may also be called the nuclear notation of an element. It helps us to identify what element is represented. It usually comprises of the atomic mass of the element written as a superscript and then the atomic number or charge written as a subscript.

In this case, we have an element with an mass of  292 amu and charge of 119. In this case, the  isotope notation of element X is \frac{292}{119} X.

Learn more: brainly.com/question/5838915

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How many sodium ions are in 1.4 kg of sodium chloride, NaCl?
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Answer:

1.44 x 10²⁵ ions of Na⁺

Explanation:

Given parameters:

Mass of NaCl  = 1.4kg  = 1400g

Unknown:

Number of ions of sodium  = ?

Solution:

The compound NaCl in ionic form can be written as;

      NaCl →  Na⁺ + Cl⁻

In 1 mole of NaCl we have 1 mole of sodium ions

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  Number of moles  = \frac{mass}{molar mass}  

    Molar mass of NaCl  = 23 + 35.5 = 58.5g/mol

Number of moles  =  \frac{1400}{58.5}     = 23.93mol

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   Since 1 mole of NaCl gives 1 mole of Na⁺  

    In 23.93 mole of NaCl will give 23.93 mole of Na⁺

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