Which statement is true? A molecule having a covalent bond can be ionic. A molecule having a covalent bond is always polar. A molecule having a covalent bond may be polar or nonpolar. A molecule having a covalent bond is always nonpolar.

Answers

Answer 1

Answer:

Answer: A molecule having a covalent bond may be polar or nonpolar.

Explanation: Covalent bond is formed by sharing of electrons and ionic bond is formed by transfer of electrons.

Thus ionic molecules are always polar as they are formed by combination of positively charged ions called cations formed by less electronegative metals and negatively charged ions called anions formed by more electronegative nonmetals.

Covalent molecules which are formed by same elements have no difference in electronegativities are non polar but those formed by different elements having difference in electronegativities are polar.

For eg: Covalent molecule $H_2$ is non polar but covalent molecule $HF$ is polar.

Answer 2

Answer: The statement that is true is that A molecule having a covalent bond may be polar or Nonpolar.

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Determine the percent yield for the reaction between 46.5 g of ZnS and 13.3 g of oxygen if 18.l4 g of ZnO is recovered along with an unknown quantity of sulfur
dioxide.
please show work thank you

Answers

The percentage yield of the reaction has been 46.74%.

Percentage yield can be given as the ratio of the actual yield to the theoretical yield.

For the theoretical yield, the balanced equation will be:

$\rm 2\;ZnS\;+\;3\;O_2\;\rightarrow\;2\;ZnO\;+\;2\;SO_2$

Thus, 2 moles of ZnS will give 2 moles of ZnO.

The moles of 46.5 g ZnS:

Moles = $\rm (weight)/(molecular\;weight)$

ZnS = $\rm (46.5)/(97.474)$

ZnS = 0.477 mol

The moles of 13.3 grams Oxygen:

Oxygen = $\rm (13.3)/(32)$

Oxygen = 0.415 mol.

The moles of 18.14 grams ZnO:

ZnO = $\rm (18.14)/(81.38)$

ZnO = 0.222 mol

According to the balanced chemical equation,

2 moles ZnO = 2 moles ZnS

0.222 mol ZnO = 0.222 mol ZnS

2 moles ZnO = 3 moles Oxygen

0.222 mol ZnO = 0.334 mol of Oxygen

Since, both the reactants are in enough concentration,

The theoretical yield can be calculated with any of the reactants. The theoretical yield of ZnO from 46.5 grams of ZnS can be given as:

1 mole ZnS = 1 mol ZnO

0.477 mol of ZnS = 0.477 mol of ZnO.

The mass of 0.477 mol of ZnO:

Mass = moles $*$ molecular weight

Mass of ZnO = 0.477 $*$ 81.38

Mass of ZnO = 38.818 grams.

The theoretical yield of ZnO = 38.818 g.

The actualyield of ZnO = 18.14 g.

Percentage yield = $\rm (18.14)/(38.81)\;*\;100$

Percentage yield = 46.74 %

The percentage yield of the reaction has been 46.74%.

For more information about the percentage yield, refer to the link:

brainly.com/question/11715808

Found an answer sheet :)

Which of the following sequences lists the relative sizes of particles in a water mixture from smallest to largest? a. Solutions, suspensions, colloids
b. Solutions, colloids, suspensions
c. Colloids, solutions, suspensions
d. Colloids, suspensions, solutions
e. Suspensions, colloids, solutions

Answers

mostly A., im guessing

The half-life of thorium-227 is 18.72 days. How many days are required for three-fourths of a given amount to decay?I'm not quite sure how to set it up to even start working it? help would be appreciated! Thanks!!

Answers

t½=18.72days
therefore t¾=18.72+½ of 18.72
we have 18.72+9.36=28.08days

Solute definition chemistry

Answers

The solute is the substance that is being dissolved into the solvent.

Example:

In lemonade, the powder is the solute, and the water is the solvent.

If an atom has six protons and four neutrons, what is its charge?

Answers

+4 that is the answer hoped i helped

the charge is always the second number.
4 would be the charge.

did this help?

For water to become a mechanical weathering agent through ice wedging, it needs to go through a cycle of freezing and thawing.True
False

Answers

The statement "For water to become a mechanical weathering agent through ice wedging, it needs to go through a cycle of freezing and thawing." is true

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