Respuesta :
Ans: Mass of NaBr = 432 g
Given:
# moles of NaBr = 4.20 moles
To determine:
The mass corresponding to 4.20 moles of NaBr
Explanation:
The # moles of a given substance is the ratio of its mass to molar mass
moles = mass (g)/molar mass (g.mol-1)------(1)
Molar mass of NaBr = 102.89 g/mol
Based on equation(1)
mass = moles * molar mass
= 4.20 moles * 102.89 g.mol-1 = 432 g
