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kakasveta [241]
3 years ago
15

How many dots are shown in the electron dot diagram for calcium, element number 20?

Chemistry
1 answer:
kykrilka [37]3 years ago
4 0
2 dots  are shown for drawing it. because it has two valence electrons
           
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Explain what makes a covalently bonded molecule polar. Use the molecules of CH4 and CH3F as examples in your explanation.
RideAnS [48]

Answer:

See explanation

Explanation:

The magnitude of electronegativity difference between atoms in a bond determines whether that bond will be polar or not.

If the electronegativity difference between atoms in a bond is about 1.7, the bond is ionic. If the electronegativity difference is greater than 0.4 and less than 1.7, the bond will have a polar covalent character. Lastly, if the electronegativity difference between the bond is less than or equal to 0.4, the covalent bond is non polar.

The electronegativity difference between carbon and hydrogen is about 0.4 which corresponds to a nonpolar covalent bond hence the molecule is nonpolar.

The electronegativity difference between carbon and fluorine is about 1.5 indicating a highly polar bond. This gives CH3F an overall dipole moment thereby making the molecule polar.

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3 years ago
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valentina_108 [34]

Answer: stay the same because it's a solid.

Explanation:

5 0
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Perform an on-line search to discover what conditions are favourable to the growth of moss. be sure to include a comment on ph c
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3 years ago
Please help, I really don’t understand this!!!
kap26 [50]

<u>Analysing the Question:</u>

We are given the balanced equation:

C₆H₁₂O₆ + 6O₂→ 6CO₂ + 6H₂O

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Mass = Molar mass * number of moles

Mass of Oxygen = 32 * 1/30

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Mass of Oxygen = 1.06 grams

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Which of the following bases can remove a proton from formic acid in a reaction that favors products?
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