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Chemistry

1 answer:

Blababa [14]3 years ago

5 0

Products are copper+ aluminium chloride
reactants are aluminium+copper chloride

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A compound consists of 75% magnesium and 25% oxygen. Find the empirical formula.

laila [671]

<h2>Answer:</h2>

% Composition of elements:

Magnesium = 75%
Oxygen = 25%

Atomic mass of given elements:

Magnesium = 24 g
Oxygen = 16 g

Now, divide % composition by Atomic mass:

$\footnotesize\implies Mg = \dfrac{\% \: Composition}{Atomic \: mass} = \dfrac{75}{24} = \bf 3.125$

$\footnotesize\implies O = \dfrac{\% \: Composition}{Atomic \: mass} = \dfrac{25}{16} = \bf 1.5625$

Simplest Ratio:

$\footnotesize\implies Mg = \dfrac{3.125}{1.5625} = 2$

$\footnotesize\implies O = \dfrac{1.5625}{1.5625} = 1$

Empirical Formula:

$\footnotesize\implies \underline{ \boxed{ \red{ \bf Empirical \: Formula = Mg_2O}}}$

8 0

3 years ago

How many atoms of nitrogen are present in 2.49 moles of nitrogen trifluoride ? atoms of nitrogen?

stepladder [879]

<span>Nitrogen trifluoride - NF3.
1 mol NF3 contains 1 mol atoms of Nitrogen
2.49 mol NF3 contains 2.49 mol atoms of Nitrogen

1 mol ---- 6.02 *10²³ atoms
2.49 mol ----- 2.49*6.02*10²³ = 15.0*10²³ atoms of N</span>

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3 years ago

Which of the following compounds is not likely to have ionic bonds LiF, NaCI, CH4, MgF2

Rina8888 [55]

Methane CH $_{4}$ does not have ionic bonds. Because of the close value of electronegativity of the carbon and hydrogen atoms the electrons are shared forming covalent bonds.