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## How many moles is equal to?

One mole of a substance is equal to **6.022 × 10²³ units** of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro’s number or Avogadro’s constant.

## Is PbCl2 covalent?

According to Fajan’s rule, greater the charge on the cation, more is its ability to polarize the bonding electrons towards itself giving the compound a higher covalent character. … PbCl has a greater charge and hence is covalent.

## What is the percentage by mass of Pb in PbCl2?

Percent composition of PbCl2 : **74.5% Pb and 25.5% Cl**.

## Is PbCl2 a precipitate?

A precipitate of lead(II)chloride forms when 150.0 mg of NaCl is dissolved in 0.250 L of 0.12 M lead(II)nitrate. True or False? Ksp of PbCl2 is 1.7 x 10-5. A precipitate of lead(II)chloride forms when 150.0 mg of NaCl is dissolved in 0.250 L of 0.12 M lead(II)nitrate.

## How do I calculate moles?

So in order to calculate the number of moles of any substance present in the sample, we simply **divide the given weight of the substance by its molar mass**. Where ‘n’ is the number of moles, ‘m’ is the given mass and ‘M’ is the molar mass.

## What is the formula for a mole?

Avogadro’s number is a very important relationship to remember: **1 mole = 6.022×1023 6.022 × 10 23 atoms**, molecules, protons, etc. To convert from moles to atoms, multiply the molar amount by Avogadro’s number. To convert from atoms to moles, divide the atom amount by Avogadro’s number (or multiply by its reciprocal).