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Assoli18 [71]
3 years ago
15

What is the correct name of this isotope? * oxygen - 16 oxygen - 8 oxygen - 24

Chemistry
1 answer:
artcher [175]3 years ago
4 0

The correct name of this isotope : Oxygen - 16

<h3>Further explanation</h3>

Given

Isotope : ₈¹⁶O

Required

The correct name

Solution

The elements in nature have several types of isotopes  

Isotopes are elements that have the same Atomic Number (Proton)  

Atomic mass is the average atomic mass of all its isotopes  

In the following element notation,

\large {{{A} \atop {Z}} \right X}

X = symbol of elemental atom

A = mass number

Z = atomic number

The isotope name is usually followed by its mass number, so the symbol above can be expressed as oxygen - 16

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Which statements best describe half-lives of radioactive isotopes? Check all that apply.
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The half-life varies depending on the isotope.

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Use the information in the square to answer the questions about copper.
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3 years ago
How much concentrated solution would it take to prepare 2.90 L of 0.420 M HCl upon dilution with water
Zanzabum

Answer:

the quantity required can go from 117 ml (for maximum concentration) up to 2900 ml ( if the concentrated solution has molarity =0.420 M)

Explanation:

the amount of water required to dilute a solution V₁ liters of Molarity M₁ to V₂ liters of M₂

moles of hydrochloric acid =  M₁ * V₁= M₂ * V₂

V₁ =   V₂ * M₂/M₁

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Since the hydrochloric acid can be concentrated up to 38% p/V  ( higher concentrations are possible but the evaporation rate is so high that handling and storage require extra precautions, like cooling and pressurisation)

maximum M₁ =38% p/V = 38 gr/ 0.1 L / 36.5 gr/mol = 10.41 M

then

min V₁ =   V₂ * M₂/ max M₁ =  2.90 L* 0.420 M/ 10.41 M= 0.117 L = 117 ml

then the quantity required can go from 117 ml up to 2900 ml ( if M₁ = M₂)

5 0
3 years ago
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