Question

How many molecules are present in 85g in amonia?

Answer 1

Ohk I will help you

☆☆☆☆☆☆☆☆☆☆☆

《 Given mass = 85g 》

chemical formula of Ammonia = NH3

• Atomic mass of Nitrogen ( N ) = 14u

• Atomic mass of Hydrogen ( H ) = 1u

♡♡♡♡❤♡♡.........

Molecular mass of Ammonia i.e.. NH3

=》 14 + 3 ( 1 )

=》 17g

♡♡♡♡♡♡♡❤❤..☆♡♡....

__________________________________

○ Formula to calculate Number of Atoms/ molecules

Number of moles = ( Number of atoms/molecules ) ÷ ( Avogadro's Constant )

So

Number of molecules = Moles × Avogadro's constant

○ Formula to calculate Number of moles

Number of moles = ( mass ) ÷ molar mass

____________________________________

Number of moles = mass ÷ ( molar mass )

= 85g ÷ 17g

=> 5 moles

Now let's use first formula to calculate number of molecules

Number of molecules = moles × Avogadro's Constant

$= > 5 \times (6.022 \times 10 ^{23} )$

$no \: of \: molecules \: in \: 85g \: of \: ammonia \: \: \: \:= > 30.110 \times 10 ^{23}$

Hope you understood please mark brainliest and follow

❤❤❤❤❤