Why is HBrO a weaker acid than HBrO3? A. The HO bond in HBrO is less polar than the HO bond in HBrO3 B. The HO bond in HBrO is more polar than the HO bond in HBrO3 C. The HBr bond in HBro is weaker than the HBr in HBrO3 D. The HBr bond in HBrO is stronger than the HBr bond in HBrO3 E. The HO bond in HBrO is weaker than the HO bond in HBrO3
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Ans: A)
HBrO and HBrO₃ are oxyacids where the acidic strength increases with the increase in the number of atoms attached to the central atom.
In both acids, oxygen is the most electronegative atom. In HBrO, the B atom is linked to only one O atom. In contrast, there are 3 electronegative O atoms surrounding the central B atom in HBrO₃ which would make the OH bond more polar and easily accessible. Thus, HBrO₃ tends to lose a proton readily than HBrO making the former more acidic.
HBrO is a weaker acid than HBrO3 because the H-O bond in HBrO is less polar than the H-O bond in HBrO3. In a series of oxyacids with similar formulas, the higher the electronegativity of the central atom, the stronger is the attraction of the central atom for the electrons of the oxygen(s), making the acid stronger.
The acid strength of HBrO is weaker than HBrO3 because the H-O bond in HBrO is less polar than the H-O bond in HBrO3 (Option A). In a series of oxyacids with similar formulas, the higher the electronegativity of the central atom, the stronger is the attraction of the central atom for the electrons of the oxygen(s). This stronger attraction of oxygen for the electrons in the O-H bond makes the hydrogen more easily released, resulting in a stronger acid (Option E). Therefore, HBrO3 is a stronger acid than HBrO.
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Related Questions
Mendeleev saw trends in the physical and chemical properties of elements when he organized them by _____.
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How many moles of silver chloride are produced from 15.0 mol of silver nitrate?
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Answer:
The Plum Pudding Model and the Nuclear Atomic Model were early atomic models that helped explain the structure of an atom. Here are sketches and key points associated with each model:
**Plum Pudding Model:**
**Key Points:**
1. Proposed by J.J. Thomson in 1904.
2. The atom is considered a positively charged sphere.
3. Electrons (negatively charged particles) are embedded randomly throughout the positively charged sphere.
4. This model suggested that the atom is mostly empty space.
**Nuclear Atomic Model:**
**Key Points:**
1. Proposed by Ernest Rutherford in 1911.
2. The atom consists of a tiny, dense, positively charged nucleus at the center.
3. Electrons orbit the nucleus in specific energy levels or shells.
4. Most of the atom's mass is concentrated in the nucleus.
5. The nucleus is surrounded by a vast amount of empty space.
Here are simplified sketches of these two atomic models:
**Plum Pudding Model:**
```
O
/ \
/ \
/ \
/ \
+ + + + + + + + +
(Positively Charged Sphere)
```
In this sketch, the "+" symbols represent the positive charges distributed throughout the sphere, while the "O" symbols represent the negatively charged electrons scattered throughout.
**Nuclear Atomic Model:**
```
Nucleus (+)
/ | \
/ | \
/ | \
- - - - - - - - - - - - - - -
| | |
| Electron | Electron |
| Orbit | Orbit |
| (e-) | (e-) |
```
In this sketch, the nucleus at the center contains positively charged protons and neutrons (not shown). Electrons are shown orbiting the nucleus in discrete energy levels or shells.
These models played a crucial role in understanding atomic structure, but they were later refined and replaced by the modern quantum mechanical model, which provides a more accurate description of how electrons behave within the atom.
Explanation:
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Answer:
Phosphorus
Explanation:
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According to the concept of Avogadro's number, there are 1.499 moles of hydrogen gas contained in 9.03 x 10²³ molecules.
What is Avogadro's number?
Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
Number of moles is calculated from Avogadro's number as, 1 mole=6.023×10²³ molecules , thus 9.03×10²³ molecules will have 9.03×10²³ /6.023×10²³=1.499 moles.
Thus, there are 1.499 moles of hydrogen gas contained in 9.03 x 10²³ molecules.
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Equivalent conversions:
1 atm = 760 mm Hg = 101.325 kPa
Dalton’s law is presented inthis formula, P = p1 + p2 + … +pn where p1, p2 to pn are the pressures of theindividual gases and the P is the total pressure.
Let p1 = CO2, p2 = O2 and p3 =N2
p1 = 125mmHg (1 atm/760 mmHg) =0.1645 atm
p2 = 22 kPa (1 atm/101.325 mmHg)= 0.2171 atm
P = p1 + p2 + p3
1.5atm = 0.1645 atm + 0.2171 atm+ p3
p3 = N2 = 1.1184 atm
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Volume = 100 mL / 1000 = 0.1 L
Molarity = 6.00 M
M = n / V
6.00 = n / 0.1
n = 6.00 * 0.1
n = 0.6 moles
1 mole NaCl ( 58.44 g/mol) * 0.6
mass = 58.44 * 0.6
mass = 35.064 g
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(2) Acids and bases are both H+ donors.
(3) Acids are H+ acceptors, and bases are H+ donors.
(4) Acids are H+ donors, and bases are H+ acceptors.
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Answer: Option (4) is the correct answer.
Explanation:
According to Bronsted and Lowry, acids are the species which can donate hydrogen or ions.
Whereas bases are the species which can accept hydrogen or ions.
Thus, we can conclude that the statement acids are donors, and bases are
acceptors describes an alternate theory of acids and bases.