How many moles (of molecules or formula units) are in each sample? Part A 42.37 g CF2Cl2 Express your answer to four significant figures.

0.3504 mol of CF₂Cl₂.

Explanation:

We need to know the molar mass of CF₂Cl₂ to find out the moles

Molar mass of C = 12 g/mol

Molar mass of F = 19 g/mol

Molar mass of Cl = 35.45 g/mol

Molar mass of CF₂Cl₂ = 12 + 19 . 2 + 35.45 . 2 =120.9 g/mol

Now we determine the moles of our mass

42.37 g . 1 mol / 120.9 g = 0.3504 mol

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation: