Answer:
Explanation:
The number of atoms of zinc can be found by using the formula
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 0.48 × 6.02 × 10²³
We have the final answer as
Hope this helps you
Answer:
2.89× 10²³ atom
Explanation:
Given data:
Number of atoms of Zn = ?
Number of moles of Zn = 0.48 mol
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
For example,
1 mole = 6.022 × 10²³ atom
0.48 mol × 6.022 × 10²³ atom / 1mol
2.89× 10²³ atom
An Arrhenius base produces hydroxide ions (–OH) when dissolved in water. A Brønsted-Lowry base can accept a proton (H+) from another substance. A Lewis base donates a pair of electrons to form a coordinate covalent bond.
An Arrhenius base is a substance that produces hydroxide ions (–OH) when dissolved in water. An example of an Arrhenius base is sodium hydroxide (NaOH), which dissociates in water to form Na+ and OH– ions.
A Brønsted-Lowry base is a substance that can accept a proton (H+) from another substance. Ammonia (NH3) is an example of a Brønsted-Lowry base as it can accept a proton to form its conjugate acid, ammonium (NH4+).
A Lewis base is a substance that donates a pair of electrons to form a coordinate covalent bond. An example of a Lewis base is ammonia (NH3), which donates a pair of electrons to a Lewis acid to form a Lewis acid-base complex.
It is possible for a base to be of more than one type. For example, ammonia (NH3) is both a Brønsted-Lowry base and a Lewis base.
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An Arrhenius base is a substance that increases the concentration of OH- in water. A Brønsted-Lowry base is a substance that can accept a hydrogen ion. A Lewis base can donate an electron pair. It is possible for a base to be classified as more than one type.
An Arrhenius base is defined as a substance that increases the concentration of hydroxide ions (OH-) when dissolved in water. Sodium hydroxide (NaOH) is an example of an Arrhenius base as it dissociates in water to form a sodium ion (Na+) and a hydroxide ion (OH-).
A Brønsted-Lowry base, on the other hand, is any substance that can accept a proton (a hydrogen ion). Ammonia (NH3) is a common example of a Brønsted-Lowry base. When it reacts with water, it accepts a proton from a water molecule, forming its conjugate acid, ammonium (NH4+).
Last but not least, a Lewis base is a substance that can donate an electron pair. For example, ammonia (NH3) can act as a Lewis base as it donates its lone pair of electrons to form a coordinate covalent bond.
Yes, it is possible for a base to be categorized as both an Arrhenius, Brønsted-Lowry, and Lewis base - water (H2O) is one such example.
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B.regrowth of forest after volcanic eruption
1 point
Answer:
λ = 426.7 nm
E = 4.66 x 10⁻¹⁹ J
Explanation:
The equation of frequency is:
f = v / λ
v: velocity
λ: wavelength
λ = v / f
λ = 3 x 10⁸ m.s⁻¹ / 7.03 x 10¹⁴ Hz
λ = 426.7 nm
The energy of a single photon is
E = hf
h: Plank's constant = 6.63 x 10⁻³⁴ m²kgs⁻¹
E = 6.63 x 10⁻³⁴ m²kgs⁻¹ x 7.03 x 10¹⁴ Hz
E = 4.66 x 10⁻¹⁹ J
Answer:
The quantum numbers n = 3 and l = 0 correspond to a specific type of orbital within the third principal energy level (n = 3) of an atom.
When l = 0, it corresponds to the s orbital. So, the orbital designated by the quantum numbers n = 3, l = 0 is the 3s orbital. The 3s orbital is spherically symmetrical and has a single orientation within its energy level.
The chemical formula for quartz is SiO_2
The chemical formula for quartz is SiO_2, which represents one silicon atom and two oxygen atoms in each formula unit.
Quartz is composed of silicon (Si) and oxygen (O) atoms bonded together in a specific arrangement. Its chemical formula, SiO2, represents this composition.
In quartz, each silicon atom is bonded to two oxygen atoms, and each oxygen atom is bonded to one silicon atom. This arrangement forms a three-dimensional network structure, making quartz a crystalline mineral.
The chemical formula SiO_2 provides a precise representation of the elements and their ratios in quartz.
Silicon and oxygen are the two elements that make up the mineral, and they are combined in a 1:2 ratio, meaning that for every silicon atom, there are two oxygen atoms.
This ratio is essential for understanding the stoichiometry and structure of quartz.
Quartz has various applications due to its unique properties, such as its hardness, transparency, and ability to transmit certain wavelengths of light, making it valuable in electronics, optics, and various industrial processes.
Learn more about Chemical formula for quartz here:
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