if a lab requires 2.0 L of a 2.5M solution of barium hydroxide, 856.7 grams of barium hydroxide will be needed.
The mass of a substance can be calculated by multiplying the number of moles by its molar mass.
However, the number of moles in 2.0 L of a 2.5M solution of barium hydroxide can be calculated as follows:
no of moles = 2L × 2.5M = 5 moles
Molar mass of Ba(OH) = 171.34g/mol
mass of barium hydroxide = 171.34 × 5
mass of barium hydroxide = 856.7g
Therefore, if a lab requires 2.0 L of a 2.5M solution of barium hydroxide, 856.7 grams of barium hydroxide will be needed.
Learn more about mass at: https://brainly.com/question/1578538
