Moles And Stoichiometry Question Preview (ID: 59191)


Unit 4, Chs 10 11 Review. TEACHERS: click here for quick copy question ID numbers.

How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O?
a) 5
b) 35 x (6.02 x 10^23)
c) 35
d) 3

The lowest whole-number ratio of the elements in a compound is called the:
a) structural formula
b) molar formula
c) molecular formula
d) empirical formula

In every chemical reaction,
a) mass and molecules are conserved
b) mass and atoms are conserved
c) moles and molecules are conserved
d) moles and liters are conserved

In the reaction 2CO(g) + O2(g) yields 2CO2(g), what is the ratio of moles of oxygen used to moles of CO2 produced?
a) 1:2
b) 2:1
c) 1:1
d) 2:2

In a chemical reaction, the mass of the products. . .
a) is less than the mass of the reactants
b) has no relationship to the mass of the reactants
c) is equal to the mass of the reactants
d) is greater than the mass of the reactants

When an equation is used to calculate the amount of product that will form during a reaction, the value obtained is called the . . .
a) actual yield
b) theoretical yield
c) minimum yield
d) percent yield

When two substances react to form products, the reactant which is used up is called the . . .
a) excess reactant
b) limiting reactant
c) determining reactant
d) maximum reactant

Any reactant that remains after a reaction is complete is called . . .
a) limiting reactant
b) determining reactant
c) excess reactant
d) minimum reactant

The SI unit for the amount of a substance is the _______. (Also equal to Avogadro's number of particles.)
a) milliliter
b) mole
c) gram
d) molecule

The representative particles of sulfur dioxide are . . .
a) atoms
b) formula units
c) ions
d) molecules

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