Answer:
m = 1.5 gram
Explanation:
Given that,
Density of protein gelatin, d = 3 g/L
The volume of protein gelatin, V = 0.5 L
We need to find the mass of the protein gelatin. The density of an object is given by :
d = m/V
Where
m is mass

So, the required mass is 1.5 gram.
I think co 2 maybe
I cant remember
Homogeneous or heterogeneous, Hope this helps!!