Chemical equation fundamentals
The term for particles on the right side of a chemical equation
Products
Balance the following chemical equation:
__HCl + __ Na --> __ NaCl + __H2
2HCl + 2Na --> 2NaCl + H2
How many H2O particles are in 3.5 mol H2O?
2.107 x 1024 particles H2O
A balloon contains 16.5 mol helium (He). What is the mass of this quantity of helium?
66 g
Which of the following are chemical reactions?
a. water boils in a pot
b. propane burns in a grill
c. sugar dissolves in water
d. apple rots in a field
B and D
What does the law of conservation of matter tell us when writing chemical equations?
The total number of atoms must be the same on each side of the equation
Balance the following chemical equation:
__ Al + __ HCl --> __ AlCl3 + __ H2
2Al + 6HCl --> 2AlCl3 + 3H2
If the molar mass of Al is 26.98 g/mol, how many grams do 2.75 mol Al weigh?
74.195 g
Calculate the molar mass of methane (CH4)
16.042 g/mol
What are the three types of atoms that a hydrogen atom can be bonded to in order to participate in hydrogen bonding?
O, N, F
What are the four states of matter we include when writing chemical equations? Hint: they are placed in parenthesis after the compound
Solid (s); liquid (l); aqueous (aq); gas (g)
Balance the following chemical equation:
__ COCl2 + __ H2O --> __ HCl + __ CO2
COCl2 + H2O --> 2HCl + CO2
If I have 8.75 x 1025 atoms of nitrogen, how many atoms of hydrogen would I need to form an even amount of ammonium atoms without having any nitrogen left over?
3.5 x 1026 atoms hydrogen
A box of table salt contains 8.75 mol NaCl. How many atoms of sodium are in the box?
5.2675 x 1024 sodium atoms
Rank the four kinds of intermolecular forces from strongest to weakest
ion-dipole > hydrogen bonding > dipole-dipole > dispersion
This is the symbol used above the arrow in equations where heat is needed to start the chemical reaction
Delta (triangle)
Balance the following chemical equation:
__C3H8 + __O2 --> __ CO2 + __ H2O
C3H8 + 5O2 --> 3CO2 + 4H2O
How many atoms of carbon are in 0.675 mol of acetone (C3H6O)?
1.21905 x 1024 atoms carbon
Calculate the molar mass of sodium bicarbonate (can use periodic table)
84.008 g/mol
What is the charge on phosphate?
3-
True or false: when writing a chemical equation, the number of bonds found in the reactants must equal the number of bonds found in the products
False
Balance the following chemical equation:
__Al(OH)3 + __H2CO3 --> __Al2(CO3)3 + __H2O
2Al(OH)3 + 3H2CO3 --> Al2(CO3)3 + 6H2O
No periodic table:
C5H7O2Br2 has a molar mass of 258.906 g/mol. The atomic masses of the individual elements are:
C = 12.01 amu
O = 16.00 amu
H = 1.008 amu
What is the atomic mass (molar mass) of bromine?
79.9 amu (or g/mol if molar mass)
How many oxygen atoms are in 540.48 g H2O?
1.806 x 1025
What is Avogadro's number?
6.02 x 10^23