Which of the gases in air are compounds? Explain how you can tell.

Chemistry

2 answers:

Eduardwww [97]3 years ago

5 0

Answer:

$\huge \underline\bold\red{Answer}$

The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.

Ksivusya [100]3 years ago

3 0

Answer:

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Write the number 874.591 correct to 2 decimal places<br>

alisha [4.7K]

Answer:

874.59

Explanation:

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2 years ago

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Given the following electronic configurations, identify how many valence electrons each atom has.

ololo11 [35]

Answer : Valence electrons in atom A = 1, B = 6 and C = 2.

Explanation :

Valence electrons means the outermost electrons are the ones which involved in bonding. Electrons are arranged in energy levels or shells.

Valence electrons are found in the highest energy orbitals of an element.

The electronic configuration of (Na) is $1s^22s^22p^63s^1$ . The highest energy orbital is 3s orbital which contains 1 electron. So,

The number of valence electrons in (Na) = A = 1

Similarly,

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The number of valence electrons in (O) = B = 6

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3 years ago

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Write the net ionic equation for this reaction occurring in water: ammonium fluoride and magnesium chloride are mixed to form ma

MAXImum [283]

Correct answer: 3. $Mg^{2+}(aq) + 2 F^{-}(aq) --> MgF_{2}(s)$

The given chemical reaction is between ammonium fluoride and magnesium chloride to form magnesium fluoride and ammonium chloride.

The balanced chemical equation representing the reaction will be,

$2NH_{4}F (aq) + MgCl_{2}(aq) -->MgF_{2} (s) + 2NH_{4}Cl (aq)$

The complete ionic equation for the reaction: All the compounds soluble in water (aqueous) will split into ions, $MgF_{2}$ will not split into ions as it is insoluble in water.