Water, H2O, frequently forms Hydrogen Bonds with other non metal atoms. Why does water do this?
A: the Oxygen has a partial negative charge which attracts atoms and molecules that have a position or partial positive charge
B: The Hydrogen has a partial negative charge which attracts atoms and molecules that have a positive or partial positive charge
C: Because Oxygen is extremely electronegative it attracts atoms and molecules with a negative or partial negative charge
D: Because Hydrogen has a very low electronegative rating it attracts atoms and molecules with a positive or partial positive charge
Answers
Considering the definition of hydrogen bond, the correct answer is option A: he Oxygen has a partial negative charge which attracts atoms and molecules that have a position or partial positive charge.
In hydrogen bonds, a molecule that presents hydrogen interacts with another that presents an atom with high electronegativity, such as oxygen, fluorine or nitrogen (O, F, N). In this way, between the hydrogen, which has a low electronegativity and the electronegative atom, an interaction is established, due to their opposite charges.
On the other hand, electronegativity is the ability of an atom to attract shared electrons in a covalent bond.
In the case of water, because oxygen is more electronegative than hydrogen, electrons, which have a negative charge, are more likely to be closer to the oxygen atom than to the hydrogen atom, which causes each hydrogen atom to have a positive charge is called a positive partial charge, and that of oxygen, a negative charge, since it has the electrons closer together.
In summary, the correct answer is option A: he Oxygen has a partial negative charge which attracts atoms and molecules that have a position or partial positive charge.
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Answer:
Opposite charges attract one another. The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond.
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Answers
n=const.
R=const.
V~T, it means If temperature increase than volume of gas increase.
if temperature decrease than volume of gas decrease.
The gas generated by four antacid tablets has a greater volume
The gas generated by two antacid tablets has a greater volume
The two reactions produce the same amount of gas
I don't know
Answers
At constant pressure and temperature, The gas generated by four antacid tablets has a greater volume. The answer should be the first option.
Answer: The correct answer is the gas generated by four antacid tablets has a greater volume
Explanation:
In the question, it is given that pressure and temperature of the gas remain constant and we need to compare the volume of the gas produced by 4 antacid tablets and 2 antacid tablets.
As, antacid is the limiting reagent. Hence, more the tablets, more gas will be produced.
Hence, more gas will be produced by four antacid tablets than the gas produced by 2 antacid tablets.
To compare the volume, we use Avogadro's Law which states that volume is directly proportional to the number of the gas at constant pressure and temperature.
(At constant Temperature and Pressure)
Hence, volume will be greater for the gas produced by four antacid tablets.
Therefore, the correct answer is the gas generated by four antacid tablets has a greater volume
Answers
The correct student is Student D, who says that Fluorine (F) has the highest ionization energy because the smaller the atom, the stronger the attraction between protons and valence electrons.
The stronger the attraction, the more energy is needed to remove a valence electron.
Ionization energy refers to the energy required to remove an electron from an atom. Smaller atoms have a stronger attraction between the positively charged protons in the nucleus and the negatively charged electrons in the outermost energy level. As a result, it takes more energy to remove an electron from a smaller atom like fluorine. This is because the electrons are held more tightly due to the stronger attraction.
So, the reasoning provided by Student D correctly explains why Fluorine has the highest ionization energy among Selenium (Se) and Fluorine (F).
Learn more about ionization energy from the link given below.
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I think the Answer is C because Flourine is stronger in electron attraction and is smaller so it has a stronger electronic pull. Hope this helps :)
Write a name of the positive ion present in this sample.
Answers
Answer : The name of positive ion present in this sample is, hydronium ion.
Explanation :
For formation of a neutral ionic compound, the charges on cation and anion must be balanced.
The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Ion : An ion is formed when an atom looses or gains electron.
When an atom looses electrons, it will form a positive ion known as cation.
When an atom gains electrons, it will form a negative ion known as anion.
As per question, hydronium ion or hydrogen ion is having an oxidation state of +1 called as or
cation and nitrate ion
is an anion with oxidation state of -1.
Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral .
Hence, the name of positive ion present in this sample is, hydronium ion.
Answers
number of moles : 0.400 / 40.0 = 0.01 moles
20.0 mL in liters = 20.0 / 1000 = 0.02 L
M = n / V
M = 0.01 / 0.02
= 0.5 M