The correct formula for boron tribromide is BBr3 (option b).
In this compound, boron (B) has a valency of 3, and bromine (Br) has a valency of 1. The subscript 3 indicates that there are three bromine atoms bonded to one boron atom.
To determine the correct formula, it's important to understand the valencies of the elements involved. Boron typically has a valency of 3, which means it can form three bonds with other elements. Bromine, on the other hand, has a valency of 1, indicating that it can form one bond.
In boron tribromide, the three bromine atoms each form a single bond with the boron atom. So, the formula is BBr3, indicating one boron atom and three bromine atoms.
It's important to pay attention to the subscripts in a chemical formula, as they indicate the number of atoms present in the compound. In this case, the subscript 3 indicates that there are three bromine atoms bonded to one boron atom. If the formula were written as B3Br or 3BBr, it would imply that there are three boron atoms, which is incorrect.
Remember, when writing chemical formulas, it's crucial to consider the valencies and the number of atoms involved to accurately represent the compound.
Answer: b. BBr3
Explanation:
When we see prefixes such as mono-, di-, and tri-, that indicates the number of atoms of that element. So, tribromide means that there are 3 atoms of bromide. Boron has no prefix, so there is only 1 atom of boron.
So, our final formula is BBr₃.
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A solution is a homogeneous mixture and does not necessarily have to include a liquid component. It can exist in gas, liquid, and solid states. Examples include air (a gas solution) and alloys (a solid solution).
No, a solution doesn't always have to involve a liquid. This is a common misunderstanding because water is often used as a solvent, which leads many to associate solutions with liquids. However, solutions can exist in all states of matter: gas, liquid, and solid.
A solution is a homogeneous mixture of two or more substances. The substance present in the largest quantity is usually the solvent, and substances in lesser amounts are the solutes.
For instance, air is a gaseous solution involving nitrogen, oxygen, and various other gases. Alloys, like the nickel dissolved in copper in US five-cent coins, are examples of solid solutions. Therefore, while often associated with liquids, solutions can exist across various physical states.
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It means the waves collides and constructive interference occurred.
If the two waves coming from the opposite direction collide with each other, there are two way of their interference.
Hence in experiment there will be constructive interference.
Answer:
C.
Explanation:
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The mass of 11.9 moles of chromium (Cr) is equal to 618.8 g.
A mole is a standard unit that is utilized to calculate a given count of particles. The particles counted are usually chemically identical entities, individually distinct.
A mole is used to calculate a huge number of quantities of atoms, molecules, ions, or other particular particles. The quantity amount of substance can be described as a measure of elementary entities of a given substance in a sample.
The number of units present in one mole is equal to 6.023 × 10 ²³ which is known as Avogadro’s constant.
Given, the number of moles of chromium = 11.9 moles
The mass of one mole of chromium = 52 g
Then, the mass of 11.9 moles of chromium = 11.9 × 52
The mass of 11.9 moles of chromium (Cr) = 618.8 g
Therefore, 618.8 grams is the mass of 11.9 moles of chromium (Cr).
Learn more about the mole, here:
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like gold,
but shatter into many pieces when struck by a
hammer, Iron Pyrite is..........
Explanation:
When gold is hammered it "squishes". Iron Pyrite is
known as "Fool's Gold". It is not..........
like gold,
but shatter into many pieces when struck by a
hammer, Iron Pyrite is..........
Gold is a malleable metal, able to deform without breaking when hammered. On the contrary, Iron Pyrite or 'Fool's Gold' is brittle; it shatters when struck due to its lack of malleability.
Gold is known as a malleable metal, which means it can be hammered or bent into different shapes without breaking. In contrast, Iron Pyrite, often known as 'Fool's Gold', is brittle, meaning it will shatter or break when struck by a hammer.
Malleability is a physical property of metals that allows them to be hammered or rolled into thin sheets. Gold is one of the most malleable metals and can be hammered into extremely thin sheets.
On the other hand, a brittle material like Iron Pyrite lacks this property of malleability. Instead of deforming under stress, it will fracture, this is why it shatters into many pieces when struck.
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A. AgCrO4(s) + Na2NO3(aq)
B. Ag2CrO4(s) + NaNO3(aq)
C. Ag(CrO4)2(s) + Na2NO3(aq)
D. Ag(CrO4)3(s) + Na(NO3)2(aq)
The products obtained when 2 AgNO₃ + Na₂CrO₄ reacts is Ag₂CrO₄ + 2 NaNO₃.
The reaction in which reduction and oxidation takes place simultaneously
by obtaining or losing an electron, the oxidation number of a molecule, atom, or ion varies.
In the question it is given that
AgNO₃(aq) + Na₂CrO₄(aq) → and we have to predict the products
So Silver Nitrate when reacts with Chromic Acid to from silver Chromate and sodium nitrate.
2 AgNO₃ + Na₂CrO₄ → Ag₂CrO₄ + 2 NaNO₃
Therefore Product B is the correct answer.
To know more about Redox Reaction
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