Answer:- Water is an electronegative molecule.
Explanation:
A molecule cannot be electronegative. Rather the atoms in a molecule may be electronegative. This first statement does not account for the hydrogen bonding in water at all because it is incorrect. However, the other statements in the question sheds more light on the nature of hydrogen bonding in water molecule.
Options B, C, and D are correct explanations for why water molecules form hydrogen bonds.
The correct option that does not help to explain why water molecules form hydrogen bonds is A- Water is an electronegative molecule. Hydrogen bonds form between a hydrogen atom in one water molecule and an electronegative atom, such as oxygen or nitrogen, in another water molecule. This attraction occurs because the electronegative atom pulls the shared electrons closer to itself, creating a partial positive charge on the hydrogen atom. The presence of partial positive and negative charges on the molecule is crucial for hydrogen bond formation. Therefore, options B, C, and D all contribute to explaining why water molecules form hydrogen bonds.
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b. a double bond.
c. ionic.
d. polyatomic.
A covalent bond where electrons are shared unequally is known as a polar bond. This unequal sharing occurs due to differences in electronegativity between the two atoms involved in the bond.
A covalent bond in which electrons are shared unequally is defined as a polar bond. This corresponds to option a) polar. This occurs because one atom is more electronegative and pulls the shared electron pair towards its nucleus making the bond polar, having a partial positive and partial negative end. Option b) a double bond, refers to a covalent bond where two pairs of electrons are shared between atoms. Option c) ionic refers to a bond where electrons are completely transferred from one atom to another and option d) polyatomic refers to a molecule that consists of more than two atoms.
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Answer :Option A) The lattice energy increases as cations get smaller, as shown by LiF and KF.
Explanation : It is observed that lattice energy is mostly influenced by two main factors of an ionic solid which are;
i) The charge on the ions - As the charge of the ions increases, the lattice energy is observed to increase too.
and
ii) The radius, or size, of the ions- As the size of the ions increases, the lattice energy decreases with it.
So, here in this question the second reason is clearly observed. Hence, it is self-explained that the size of the cations are decreased in the ionic solids the lattice energy increases.
TrueFalse
Answer:
The hydrogen peroxide would dissociate down into oxygen and water.
Explanation:
The hydrogen peroxide dissociates into oxygen and water.
2H₂O₂ → 2H₂O + O₂
The yeast comprises an enzyme known as catalase that catalyzes the reaction. Greater the concentration of the catalyst supplemented, the faster will be the decomposition of the hydrogen peroxide. Therefore, if one adds more than 5 milliliters of H₂O₂ to the yeast solution, the dissociation would take place at a quicker rate, and the bubbles and the accompanying fizz would be in a higher amount.
The yeast breaks down the hydrogen peroxide (H2O2) into oxygen and water.
Answer:
The answer is C!
Explanation:
I took the test ;)
(2) homogeneous mixture
(3) heterogeneous compound
(4) heterogeneous mixture
Dilute, aqueous potassium nitrate solution is best classified as a:
(2) homogeneous mixture
Explanation:
A homogeneous mixture may be a solid, liquid, or volatilized mixture that has a similar proportions of its parts throughout any given sample.
Conversely, a heterogeneous mixture has parts whose proportions vary throughout the sample.
Because it's a combination of water and nitrate and you cannot clearly see the separation within the mixture .
A dilute, aqueous potassium nitrate solution is classified as a homogeneous mixture due to its uniform composition and properties
A dilute, aqueous potassium nitrate solution is best classified as a homogeneous mixture. By definition, a homogeneous mixture is a mixture which has uniform composition and properties throughout. For instance, when potassium nitrate is dissolved in water, it spreads evenly throughout the solution, creating a consistent composition from one drop of solution to the next. Therefore, it's not a compound (homogeneous or heterogeneous) because it doesn't consist of two or more elements chemically bonded together, and it's not a heterogeneous mixture because its composition isn't varied or unequal.
Learn more about Homogeneous Mixture here:
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