Equations & Balancing
In a balanced chemical reaction, atoms are neither ______ nor ______.
What is Created nor Destroyed?
A reaction where two or more substances react to form one product (A + B → C).
What is a combination reaction?
Value of Avogadro's Number
What is 6.022 x 10²³?
This type of formula shows the actual number of atoms of each type in a molecule.
What is Molecular Formula?
This state symbol indicates that a substance is dissolved in water
What is (aq) or Aqueous?
These numbers are placed in front of chemical formulas to show the relative numbers of molecules involved.
What are Stoichiometric Coefficients?
A reaction where one substance undergoes a reaction to produce two or more other substances (C → A + B).
What is a decomposition reaction?
The mass in grams of one mole of a substance is known as this
What is Molar Mass?
This type of formula shows the simplest whole-number ratio of atoms in a compound
What is Empirical Formula?
To convert from grams of a substance to moles, you must divide the mass by this
What is molar mass (or molecular weight?
When balancing an equation, you should adjust coefficients but never change these small numbers within a formula.
What are subscripts?
Rapid reactions that produce a flame and always involve O₂ from the air as a reactant
What are combustion reactions?
This unit is used to describe the mass of a single atom, and is numerically equal to the molar mass in g/mol.
What is amu (atomic mass unit)?
Write the complete, balanced chemical equation with state symbols for the reaction between solid iron(III) hydroxide and aqueous sulfuric acid to form aqueous iron(III) sulfate and liquid water. Answer in form of Q: This is the sum of all coefficients and the state symbol of iron (III) sulfate.
What is 12 and (aq)?
The subscripts in a molecular formula are always ______-number multiples of the subscripts in the empirical formula.
What is whole?
Balanced version of: __CH₄ + __O₂ → __CO₂ + __H₂O
What are
1, 2, 1, 2?
These two substances are the products made when a hydrocarbon reacts with oxygen.
What are CO₂ and H₂O?
One mole is defined as the number of atoms in exactly 12 grams of this isotopically pure element
What is Carbon-12 (¹²C)?
Balance the equation:
Al + HCl → AlCl₃ + H₂
This is the sum of all of the coefficients using the smallest ratio.
What is 13?
Calculate the percentage by mass of Oxygen in H₂O (H=1, O=16).
What is 88.9%?
(16/18 x 100)
In the balanced combustion of ethane, this is the coefficient of O₂ and the sum of all coefficients?
What are 7 and 19?
Classify this reaction: 2 NaN₃ (s) → 2 Na (s) + 3 N₂ (g).
What is decomposition?
This sample contains more carbon atoms: 12 g of ¹²C or 1 mole of C₂H₆.
What is 1 mole of C₂H₆?
(it contains 2 moles of C atoms)
In the balanced reaction:
PCl₃(l) + 3H₂O(l) → H₃PO₃(aq) + 3HCl(aq)
1 molecule of PCl₃ produces 3 molecules of HCl.
If 4 molecules of PCl₃ reacted, this is the amount of total HCl molecules produced
What is 12 HCl molecules?
(4*3)
One mole of sodium carbonate (Na₂CO₃) contains this many moles of oxygen atoms.
What is 3 moles?