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WorksheetsStoichiometry Mass to Volume
Total questions: 15
Worksheet time: 24mins
2Al + 6HCl --> 2AlCl3 + 3H2
Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?
13
8.8
0.99
1.0
Mg3N2 + 3H2O ––> 3 MgO + 2NH3
If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20˚C and 0.989 atm?
4.9 L NH3
4.96 L NH3
0.261 L NH3
0.26 L NH3
1Mg + 2H2O --> Mg(OH)2 + H2
What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium?
62.0 L
0.12 L
2.77 L
1.15 L
2CO + O2 → 2CO2
In a chemical reaction, the mass of reactants ___.
is less than the mass of products
is greater than the mass of products
has no relationship to the mass of products
is equal to the mass of products
When calculating molar mass for an element, which number do you need to look at on the periodic table?
Atomic number
Atomic Mass
Atomic particles
Avogardo's Number
The calculation of the relationships between different molecules in a reaction is the definition of __________________.
physics
algebra
stoichiometry
language arts
Before you begin any stoichiometry problem, you must always start with this.
A periodic table.
A calculator.
A balanced chemical equation.
All of the above are helpful.
The process of comparing units is called ____________________.
stoichiometry
dimensional analysis
algebra
social studies
What conversion factor do you always use in stoichiometry problems?
reciprocal of the molar mass of a substance
molar mass of a substance
mole ratio
molar volume of a gas
What is the number of atoms per molecule for each diatomic molecule?
1
2
3
4
5
When you balance a chemical equation, you are following:
the Law of Conservation of Mass
the Law of Conservation of Energy
the Law of Motion
atomic theory
Coulomb's Law of Attraction
When balancing, what part of a chemical equation are you potentially changing?
coefficients in front of chemical formulas
chemical formulas derived from the element boxes
subscripts within the chemical formulas
the ions (oxidation states) of polyatomic ions
What is the mole ratio of Aluminum to Oxygen in the chemical reaction:
Al + O2 --> Al2O3
1:1
2:3
4:2
4:3
3: 4
