Chem study

The percent yield can be determined by dividing the actual yield by the theoretical yield and multiplying this value by 100%.

• True

• False

There is only one distinct empirical formula for each compound that exists.

• True

• False

What is the name given to the quantitative relationship between the substances that are consumed and produced in a chemical reaction?

• law of definite proportions

• percent equivalency

• law of molecular balance

• stoichiometry

• percent composition

In a correctly balanced equation, the number of reactant molecules must equal the number of product molecules

• True

• False

According to the VSEPR model, the predicted molecular geometry of the SO3 molecule is

• seesaw

• trigonal planar.

• pyramidal.

• tetrahedral.

• square planar.

What is the predicted molecular geometry of the CH4molecule according to the VSEPR model?

• square planar

• tetrahedral

• trigonal pyramidal

• seesaw

• trigonal planar

According to the VSEPR model, which molecule is predicted to be linear?

• H2CO

• HCN

• BF3

• SO3

According to the VSEPR model, the molecular geometry of the carbonate ion, CO32–,is

• pyramidal

• tetrahedral

• octahedral.

• trigonal planar.

• square planar.

Which one of the following molecules is nonpolar?

• NH3

• H2O

• OF2

• BeCl2

• CH3Cl

Which one of the following molecules has a dipole moment of zero?

• 
  CH2Cl2

• NH3

• SO2

• CO

• SO3