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Nimfa-mama [501]
3 years ago
14

Which of these is a model that

Chemistry
1 answer:
Ann [662]3 years ago
8 0
Mark Brainliest please

Answer :

electron dot diagram

Explanation

the valence electrons of an atom are the electrons located in the highest occupied principal energy level. Valence electrons are primarily responsible for the chemical properties of elements. The number of valence electrons can be easily determined from the electron configuration. Several examples from the second period elements are shown in the Table below.

lithium 1s22s1 1 valence electron
beryllium 1s22s2 2 valence electrons
nitrogen 1s22s22p3 5 valence electrons
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<h3><u>Answer</u>;</h3>

C3H4O

<h3><u>Explanation;</u></h3>

Empirical formula is the simplest formula of a compound;

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Mass of CO2 produced = 2.053 g

Mass of carbon in original sample = 12.01/44.01 × 2.053

                                                           = 0.5603g  

Molar mass H2O = 18  

Mass of H in original sample = 2/18 ×0.5601

                                               = 0.0622  g

Thus; original sample contained 0.5603g C and 0.0622g H. The balance of the sample was O  

Mass of O = 0.8715 - (0.5603 + 0.0622) = 0.249g  

The mole ratio of C:H:O  will be;

Moles C = 0.5603/12 = 0.0467  

Moles H = 0.0622  

Moles O = 0.249/16 = 0.01556  

C:H:O = 0.0467:0.0622:0.01556  

Divide through by 0.01556:  

C:H:O = 3:4:1  

Empirical formula is thus C3H4O

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