A0.75mol calcium carbonate (caco3) pellet has what mass?

75 g  

Step-by-step explanation:

Step 1. Calculate the molar mass of CaCO₃

Ca                    =   40.08

  C                    =   12.01

3O = 3 × 16.00 =  48.00

               Total = 100.09 g/mol

Step 2. Calculate the mass of the pellet

Mass of CaCO₃ = 0.75 mol × (100.09 g/1 mol)

Mass of CaCO₃ = 75 g

it should be p1 v1 = p2 v2

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it