Hydroxide Ions
Acid and Bases are defined according to three different theories and concepts.
A) Arrhenius Concept
B) Lowry Bronsted Theory
C) Lewis Theory
According to Arrhenius Concept of Acid and Base, "Acid is any specie which when dissolved in water ionizes to produce H⁺ ions".
Examples:
HNO₃ → H⁺ + NO₃⁻
H₃PO₄ → 3 H⁺ + PO₄³⁻
While, "Bases are those species which when dissolved in water produces Hydroxyl Ions (OH⁻)".
Examples:
KOH → K⁺ + OH⁻
Ca(OH)₂ → Ca²⁺ + 2 OH⁻
When an Arrhenius base dissolves in water, it yields hydroxide ions (OH-).
When an Arrhenius base is dissolved in water, it yields hydroxide ions, which have a chemical formula of OH-. The formula for an Arrhenius base is usually represented as BOH, where B represents a cation (positive ion) and OH- represents the hydroxide ion. Some examples of Arrhenius bases include sodium hydroxide (NaOH) and potassium hydroxide (KOH).
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Among He, Ne, Ar, and Kr, krypton (Kr) would be most likely to form a compound with fluorine. It's one of the heavier noble gases, which can form compounds with highly reactive elements like fluorine due to their slightly less firm hold on outermost electrons.
The elements in Group 18 are noble gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). These gases are known for their low reactivity because they have fully filled valence shells. However, the three heaviest noble gases - krypton, xenon, and radon - can react with fluorine to form fluorides, with xenon fluorides being the most well-researched among other noble gas compounds.
Among the options provided (He, Ne, Ar, Kr), krypton (Kr) would be the most likely to form a compound with fluorine. This is due to krypton's bigger size as it descends the periodic table, which slightly decreases the grip on its outermost electrons, making it marginally more likely to react with extremely reactive elements like fluorine.
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The volume of the rock is 7mL. The correct option is c)7ml
From the question,
We are to determine the volume of the rock.
When an object is submerged in a container containing a liquid, the submerged object displaces a volume of liquid equal to the volume of the object.
That is,
Volume of object = Final volume - Initial volume
From the given information,
Initial volume = 40mL
Final volume = 47mL
∴ Volume of the rock = 47mL - 40mL
Volume of the rock = 7mL
Hence, the volume of the rock is 7mL. The correct option is c)7ml
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the Law of Universal Gravitation
the Law of Stellar Evolution
the Law of Propulsion
Option A is correct.
A.The potential energy in the system is greatest at X.
A ball resting at the top of a hill will have greatest potential energy because when an object is at rest it tend to have greatest potential energy. When It moves from position X to Y the potential energy of the ball will decrease and its kinetic energy will increase.
Answer choices are listed below.
A.The potential energy in the system is greatest at X.
B.The kinetic energy in the system is greatest at X.
3.55 x 10^23 molecules are found in 0.589 of N2.