CHEMISTRY HIGH SCHOOL

Which is a cause of polarity in water molecules? partial negative charge on the hydrogen atoms partial positive charge on the oxygen atom high electronegativity difference between oxygen and hydrogen low electronegativity difference between oxygen and hydrogen

Answers

Answer 1
Answer:

Answer:

high electronegativity difference between oxygen and hydrogen

Explanation:
Answer 2
Answer:

Final answer:

Water molecules become polar due to the difference in electronegativity between the oxygen and hydrogen atoms. This leads to the development of partial positive charges on the hydrogen atoms and a partial negative charge on the oxygen atom. These polar bonds allow for the formation of hydrogen bonds with other molecules.

Explanation:

Water is a polar molecule, with the hydrogen atoms acquiring a partial positive charge and the oxygen a partial negative charge. This occurs because the nucleus of the oxygen atom is more attractive to the electrons of the hydrogen atoms than the hydrogen nucleus is to the oxygen's electrons. Thus oxygen has a higher electronegativity than hydrogen and the shared electrons spend more time in the vicinity of the oxygen nucleus than they do near the nucleus of the hydrogen atoms, giving the atoms of oxygen and hydrogen slightly negative and positive charges, respectively. Another way of stating this is that the probability of finding a shared electron near an oxygen nucleus is more likely than finding it near a hydrogen nucleus. Either way, the atom's relative electronegativity contributes to the development of partial charges whenever one element is significantly more electronegative than the other, and the charges generated by these polar bonds may then be used for the formation of hydrogen bonds based on the attraction of opposite partial charges. (Hydrogen bonds, which are discussed in detail below, are weak bonds between slightly positively charged hydrogen atoms to slightly negatively charged atoms in other molecules.) Since macromolecules often have atoms within them that differ in electronegativity, polar bonds are often present in organic molecules.

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25 The chemical process in which electrons are gained by an atom or an ion is called(1) addition (3) reduction(2) oxidation (4) substitution

Answers

Answer: Option (3) is the correct answer.

Explanation:

In the process of oxidation, an atom loses electrons or an increase in oxidation number of the atom occurs.

For example, Cu(s) \rightarrow Cu^(2+)(aq) + 2e^(-) is an oxidation process.

Whereas in a process of reduction, an atom gain electrons or a decrease in oxidation number of the atom occurs.

For example, 2Ag^(+) + 2e^(-) \rightarrow 2Ag(s) is a reduction process.

Thus, we can conclude that the chemical process in which electrons are gained by an atom or an ion is called reduction.
It is the process of reduction. If you want to remember it, I recommend remember that gaining electrons 'reduces' charge, by increasing the negative number... If that makes sense XD

Which of these best describes the difference between the formulas for nitrogen monoxide and nitrogen dioxide? Which of these best describes the difference between the formulas for nitrogen monoxide and nitrogen dioxide? F. Nitrogen monoxide has one more atom of nitrogen. G. Nitrogen dioxide has one fewer atom of oxygen H. Nitrogen monoxide has one fewer atom of oxygen J. Nitrogen dioxide has one more atom of nitrogen show more Which of these best describes the difference between the formulas for nitrogen monoxide and nitrogen dioxide? F. Nitrogen monoxide has one more atom of nitrogen. G. Nitrogen dioxide has one fewer atom of oxygen H. Nitrogen monoxide has one fewer atom of oxygen J. Nitrogen dioxide has one more atom of nitrogen

Answers

Nitrogen monoxide has 1 oxygen atom and
Nitrogen dioxide has 2 oxygen atoms

Which of the following would most likely be the characteristics of a desert?O Freezing temperatures and location in higher latitudes
O High temperatures and location in high latitudes
O Moderate temperatures and location in mid to high latitudes
O Warmer temperatures and location around the equator

Answers

Answer: D

Explanation:

Answer: High temperatures and location in high latitudes

Explanation:

the trend for ionization energy is a general increase from left to right across a period. However phosphorus is found to have higher first ionization energy value than sulfur. Explain this exception to the general trend in terms of electron arrangements and attraction/repulsion

Answers

Since phosphorus is in the 5th group it has the ability to gain or lose electrons

Which of the following is not a type of adaptation? A. Functional B. Mechanical C. Behavioral D. Structural

Answers

B. Mechanical-  is NOT a type of adaptation

4. If an object has a density of 0.8 g/cm3, will it float or sink in water?

Answers

Explanation:

Substances with their density less than the density of water which is 1 g/cm³ will float on it whiles those greater than that of water will sink into the water.

From the question the density of the object is 0.8 g/cm³

Since it's density is less than that of water the object will float on water .

Hope this helps you

Final answer:

An object with a density of 0.8 g/cm3 will float in water because its density is less than the density of water, which is 1 g/cm3.

Explanation:

The question is asking whether an object with a density of 0.8 g/cm3 will float or sink in water. Floating and sinking are determined by the principle of buoyancy, which depends on the density of the object compared to the fluid (in this case, water) it is placed in.

Water has a density of 1 g/cm3. So, if the object's density is less than 1 g/cm3, it will float, if it's more it will sink. Since 0.8 g/cm3 is less than 1 g/cm3, an object with this density will float in water.

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