Problemas
How many molecules are there in 122 grams of Cu(NO_(3))_(2)
Roztwór
Sergio
avanzado · Tutor durante 1 años
4.1
(243 Votos)
Respuesta
To find the number of molecules in 122 grams of
, we need to follow these steps:1. Calculate the molar mass of
.2. Convert the given mass of
to moles.3. Use Avogadro's number to find the number of molecules.Step 1: Calculate the molar mass of
.The molar mass of
is the sum of the molar masses of its constituent atoms:- Copper (Cu): 63.55 g/mol- Nitrogen (N): 14.01 g/mol- Oxygen (O): 16.00 g/molMolar mass of
= 63.55 + (2 × 14.01) + (6 × 16.00) = 187.57 g/molStep 2: Convert the given mass of
to moles.Given mass of
= 122 gramsMoles of
= Given mass / Molar massMoles of
= 122 g / 187.57 g/mol = 0.651 molesStep 3: Use Avogadro's number to find the number of molecules.Avogadro's number =
molecules/molNumber of molecules = Moles × Avogadro's numberNumber of molecules = 0.651 moles ×
molecules/molNumber of molecules =
moleculesTherefore, there are approximately
molecules in 122 grams of
.