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4 years ago

Which of the following molecules contains a polar covalent bond?

Chemistry

2 answers:

adelina 88 [10]4 years ago

6 0

Answer:

CO contains a polar bond.

Explanation:

CO has a polar bond because of the electronegativity difference between the C and O atom. According to Pauling scale the electronegativity value of C and O are 2.5 and 3.5 respectively. So the electronegativity difference in C-O bond is (3.5 – 2.5)1.0, which greater than 0.5 and hence polar.

O₂, N₂ and H₂ do not have polar bonds as there is no electronegativity difference between two atoms of the same element.

kari74 [83]4 years ago

5 0

Co is the correct answer

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Anyone know the parts of this cell? Please and thank you!

aniked [119]

Answer: A, Nucleus

B, Cell memebrane

C, vacuole

D, Chloroplast, mitocondria, amyloplast.

Explanation:

These only work if this is a plant cell which you did not specify.

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3 years ago

Draw the structure of the grignard reagent formed from the reaction of p−bromofluorobenzene with magnesium in diethyl ether. cli

Nonamiya [84]

This is the structure. The magnesium bromide will complex with the carbanion.

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4 years ago

A scientist produces zinc iodide (zni2). (a) calculate the minimum mass of zinc that needs to be added to 0.500 g of iodine so t

harina [27]

The minimum mass of Zinc, Zn that needs to be added to 0.500 g of iodine so that the iodine fully reacts is 0.128 g

<h3>Balanced equation </h3>

Zn + I₂ —> ZnI₂

Molar mass of Zn = 65 g/mol

Mass of Zn from the balanced equation = 1 × 65 = 65 g

Molar mass of I₂ = 127 × 2 = 254 g/mol

Mass of I₂ from the balanced equation = 1 254 = 254 g

SUMMARY

From the balanced equation above,

254 g of I₂ required 65 g of Zn

<h3>How to determine the mass of Zn needed </h3>

From the balanced equation above,

254 g of I₂ required 65 g of Zn

Therefore,

0.5 g of I₂ will require = (0.5 × 65) / 254 = 0.128 g of Zn

Thus, the minimum mass of Zn required is 0.128 g

Learn more about stoichiometry:

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2 years ago

Which of the following pieces of glassware can be used to measure the volume of a liquid with the

andrew11 [14]

Answer:

The correct option is GRADUATED CYLINDER.

Explanation:

Each of the glassware used in the laboratory has its specific functions. The graduated cylinder is especially manufacture to facilitate the measurement of accurate volume of liquids in the laboratory. Measurements obtained by means of graduated cylinder can be considered to be moderately accurate; volumentric flasks are more accurate than graduated cylinder and should be used when higher precision are required.

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3 years ago

Enter the chemical formula of a binary molecular compound of hydrogen and a Group 6A element that can reasonably be expected to

Ber [7]

Answer:

H₂Se

Explanation:

A way of estimating the acidity of a weak acid is by analizing the<em> stability of the formed anion</em>. In this case, we should find a Group 6A element that in its anionic forms (HX⁻ and X⁻²) is more stable than HS⁻ and S⁻², thus it would be more acidic in aqueous solution.

The anionic forms of Se are more stable than the forms of S, similarly to how Br⁻ is more stable than Cl⁻.

8 0

3 years ago