Chemistry, 23.12.2019 17:31 enm01

What is a mole and why does a mole of carbon and a mole of magnesium for example weigh different if they have the same number of atoms(

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Answer from: bacchus6663

Mole is a quantity corresponding to $6.022\cdot 10^{23}$ of units;

Difference in molar mass produces different masses for the same number of moles of two substances

Explanation:

We can define a mole very easily. Mole may be considered in any system, not only in chemistry. However, mole is mostly significant in chemistry.

Mole is simply a unit of measurement which is equal to the Avogadro's number of objects. That is, if we have 1 mole of some specific object, it means we have a total of Avogadro's number ( $6.022\cdot 10^{23}) of objects.For example, let's say that we have 2 moles of stones. This means we have a total of:[tex]2\cdot N_A = 2\cdot 6.022\cdot 10^{23} = 1.2044\cdot 10^{24}$ stones.

Since this is a very huge number, we mainly use moles in chemistry to represent the number of molecules, atoms or ions.

You defined it perfectly: if we have 1 mol of C and 1 mol of Mg, they both contain the same number of atoms, that is, a total of $6.022\cdot 10^{23}$ atoms.

The problem is, however, that each individual atom of magnesium weighs more than the carbon atom. If you look at the periodic table, the molar mass of magnesium is 24.305 g/mol, while the molar mass of carbon is 12.011 g/mol. Magnesium atom is more than twice as heavy as carbon.

According to the molar mass, 1 mol of magnesium contains 24.305 grams and 1 mol of carbon contains 12.011 grams. This is essentially due to a different nature of atoms, they have different masses.

Take, for comparison, one stone and one feather. Although we have one of each, stones weigh more than feathers.

Answer from: Quest

For cyclohexane compounds drawn in a chair conformation: -axial bonds are vertical -equatorial bonds are parallel to two bonds within the ring. thus, as i assume the chair conformation is drawn: -the x group is in an axial position, as are the five other vertical bonds. -three axial bonds are on the top face of the ring -the other three axial bonds are on the bottom face the position of the second substituent on each ring carbon is equatorial. gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other. drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1. click this link and watch some academic videos that may you more understand the topic

Answer from: Quest

l dont know l am s sorry

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What is a mole and why does a mole of carbon and a mole of magnesium for example weigh different if...