Chem final

In using balanced equations to solve mass-mass problems, the mass of each reactant is first converted to

• liters

• mass of products

• grams

• moles

• number of particles

In a chemical reaction, what is the relationship between the total mass of the reactants and the total mass of the products?

• They must be equal

• The mass of the reactants must be greater

• All answers are correct

• There is no general relationship between the two

• The mass of the products must be greater

In a chemical equation, the symbol that takes the place of the word yields is a(n)

• coefficient

• plus sign

• arrow

• equal sign

• minus sign

What is the term for a phase change from gas to liquid?

• fusion

• sublimation

• deposition

• vaporization

• condensation

The first step in any stoichiometric problem (after reading the problem) is

• balancing the equation

• converting moles to liters

• changing grams to moles

• finding the mole ratio

• converting moles to grams

In a balanced chemical equation, the molar ratio of two reactants is determined from the

• total mass of reactants equals total mass of products

• liters of each reactant

• number of grams of each reactant

• coefficient for each reactant

• number of atoms in each reactant

In what kind of reaction does a single compound break down into two or more smaller compounds or elements?

• combustion

• single replacement

• combination/

  synthesis

• double replacement

• decomposition

What is the term for the phase change from liquid to gas?

• condensation

• vaporization

• sublimation

• fusion

• deposition

Which of the following is NOT true of a balanced equation when analyzing reactants to products?

• The total number of molecules remains the same

• The total number of atoms remains the same

• The kinds of atoms remain the same

• The total mass remains the same

• The number of atoms of each element remains the same

In a balanced equation describing a chemical reaction involving solid substances, the coefficients refer to the relative number of

• cubic centimeters

• atoms

• moles

• liters

• grams