CHEMISTRY MIDDLE SCHOOL

19. Which atom in a water molecule has the greatest electronegativity?a. one of the hydrogen atoms
b. both hydrogen atoms
c. the oxygen atom
d. There is no difference in the electronegativities of the atoms in a water molecule.

Answers

Answer 1
Answer:

The oxygen atom in a water molecule has the greatest electronegativity. Therefore, the correct option is option C.

What is electronegativity?

The tendency of an atom of a particular chemical element could attract shared electrons while forming a chemical bond is represented by the symbol. The electronegativity of an atom is determined both by its atomic number as well as the distance between its valence electrons and the charged nucleus.

The higher the related electronegativity, the more electrons an atom or substituent group attracts. Electronegativity is a simple approach to quantify bond energy as well as the sign and degree of a bond's molecular polarity, that describes a bond all along continuum between covalent through ionic bonding. The oxygen atom in a water molecule has the greatest electronegativity.

Therefore, the correct option is option C.

To learn more about electronegativity, here:

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Answer 2
Answer:

Answer:

The Oxygen Atom

Explanation:

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Melted candle wax has no fixed shape, but it does have a fixed volume. So, melted candle wax is a A.Liquid
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Plz answer fast


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2C₂H6 + 702 —>4C02 + 6H₂OIf you used 4.88x10^25 molecules of C2H6 to start a
fire, how many molecules of CO2 did you Create?

Answers

Answer:

975.56×10²³ molecules

Explanation:

Given data:

Number of molecules of C₂H₆ = 4.88×10²⁵

Number of molecules of CO₂ produced  =  ?

Solution:

Chemical equation:

2C₂H₆  + 7O₂     →      4CO₂ + 6H₂O

Number of moles of C₂H₆:

1 mole = 6.022×10²³ molecules

4.88×10²⁵  molecules×1mol/6.022×10²³ molecules

0.81×10² mol

81 mol

Now we will compare the moles of C₂H₆ with CO₂.

                     C₂H₆          :             CO₂

                          2           :               4

                           81         :           4/2×81 = 162 mol

Number of molecules of CO₂:

1 mole = 6.022×10²³ molecules

162 mol ×6.022×10²³ molecules / 1 mol

975.56×10²³ molecules

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