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Lana71 [14]
4 years ago
12

Please help!!!

Chemistry
1 answer:
klemol [59]4 years ago
3 0

Answer:

2Mg + O₂ ⇒ 2 MgO

Explanation:

When the MgO formation reaction is carried out experimentally, it can be seen that Magnesium a solid that has a metallic luster, when a flame is brought closer so that the oxidation reaction of the metal occurs, it is appreciated that a colored flame is produced white for a few moments (the duration of the flame depends on the initial amount of magnesium) and when the reaction finished, the magnesium became a white solid, opaque and very fragile. This is because <em>Mg reacted with oxygen and magnesium oxide formed</em>, which is the white solid.

<em>Synthesis reactions are those in which two or more reagents combine to obtain a new product compound</em>. The general formula for this type of reaction is:

A + B ⇒ C

In the case of the example of the statement, the reaction form of this synthesis would be:

2Mg + O₂ ⇒ 2 MgO

The equation is matched in such a way that there is the same amount of atoms of each species in both reagents and products, thus respecting the <em>principle of conservation of mass</em>.

<u><em>Clarification</em></u>: In the synthesis reaction, oxygen is placed in its molecular form (O₂), because the compound is naturally found, it is a simple substance. Magnesium, on the other hand, is found as a simple substance as atoms.

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3 years ago
Why can a molecule contain polar bonds be non polar overall?
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How much 0.02 m kmno4 solution should be needed if the solutions tested have a composition of 3% h2o2 by mass?
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A certain compound has the following percent composition: 57.1% C, 4.8% H, and 38.l% O.
crimeas [40]

Answer:

C₆H₆O₃

Explanation:

Calculation sequence:

% => grams => moles => reduce => empirical Ratio

Molecular multiple = Molecular Mass / Empirical Mass

  C: => 57.1% => 57.1 g => 57.1/12 = 4.7583

  H: =>  4.8% =>  4.8 g =>   4.8/1  = 4.8000

  O: => <u>38.1% => 38.1 g </u>=> 38.1/16 = 2.3813

TTL => 100%       100 g

Reduced Mole values =>

C : H : O => 4.7583/2.3813 : 4.8000/2.3813 : 2.3813/2.3813 => 2 : 2 :  1

∴ empirical formula => C₂H₂O

empirical formula weight => 2C + 2H + 1O = [2(12) + 2(1) + 1(16)] amu = 42 amu

molecular formula weight (given in problem) = 126 g/mole

The molecular formula is a whole number multiple of the empirical formula.

molecular multiple = 126 amu / 42 amu = 3

∴ molecular formula => (C₂H₂O)₃ => C₆H₆O₃

8 0
3 years ago
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