Does anyone know how I can calculate the mole faster? Like barium chloride -- BaCl -- their respective numbers --- the result g/mol
like is there a faster way to calculate it or is this the only way?

Question

Does anyone know how I can calculate the mole faster? Like barium chloride --> BaCl --> their respective numbers ---> the result g/mol 
like is there a faster way to calculate it or is this the only way?

ihy · Answer

Write the formula – BaCl₂

Count each element – Ba = 1, Cl = 2

Multiply by atomic mass (from periodic table)

Ba ≈ 137.33 g/mol

Cl ≈ 35.45 g/mol → ×2 = 70.90 g/mol

Add → 137.33 + 70.90 = 208.23 g/mol

gelphielvr · Answer

@ihy wrote:

Write the formula – BaCl₂ Count each element – Ba = 1, Cl = 2 Multiply by atomic mass (from periodic table) Ba ≈ 137.33 g/mol Cl ≈ 35.45 g/mol → ×2 = 70.90 g/mol Add → 137.33 + 70.90 = 208.23 g/mol

ok thanks but do you know if there's a way to do it faster?

gelphielvr · Answer

@ihy wrote:

Write the formula – BaCl₂ Count each element – Ba = 1, Cl = 2 Multiply by atomic mass (from periodic table) Ba ≈ 137.33 g/mol Cl ≈ 35.45 g/mol → ×2 = 70.90 g/mol Add → 137.33 + 70.90 = 208.23 g/mol

wait why did you multiply it?

gelphielvr · Answer

ohh I got it