Answer:
The correct answer is mass = 48g
Step-by-step explanation:
Hello! 
Let's solve this! 
 
The data is: 
volume: 30.0 ml 
density: 1.60 g / ml 
 
The density formula is: 
 
density = mass / volume 
 
From this formula we cleared the mass: 
mass = density * volume 
mass = (1.6g / ml) * 30ml = 48g 
 
We conclude that the correct answer is mass = 48g