Question

1. how many milliliters of C3H20O4 does 3.0 moles occupy? Density is 1.2 g/mL

2. How many grams is 4.3 moles of C3H8O2

Answer 1

1.

The volume(V) occupied by a liquid of mass m and density d is given by:

The mass(m) of C₃H₂₀O₄ is found using the following formula:

The molar mass of C₃H₂₀O₄ is 120.2 g/mol

The number of moles is given to be 3.0 moles.

Therefore the mass(m) of C₃H₂₀O₄ is:

Therefore we have:

m = 360.6 g

d = 1.2 g/mL

Therefore the volume(V) occupied by C₃H₂₀O₄ is:

Therefore the answer is 300 mL

2.

The mass(m) of C₃H₈O₂ is found using the following formula:

The molar mass of C₃H₈O₂ is 76.1 g/mol

The number of moles is given to be 4.3 moles.

Therefore the mass(m) of C₃H₈O₂ is:

Therefore the answer is 327 g

Note: If you round the answer to proper number of significant figures(which is two), you get the rounded answer as 330 g