Moles
Molar Mass
What is the mass of 1 mole of a substance
STP
What is Standard Temperature and Pressure
A compound is formed when 9.03g magnesium combines completely with nitrogen to form 12.51g of magnesium nitride. It has a percent composition of _____.
What is 72.2% Mg and 27.8% N
Write a sentence that describes this chemical reaction:
Na (s) + H2O (l) --> NaOH (aq) + H2 (g)
What is when solid sodium is dropped in water, hydrogen gas and aqueous sodium hydroxide are produced
Classify the type of reaction:
CH4 + 2O2 --> CO2 + 2H2O
The representative particle for an ionic compound
What is a formula unit
Avogadro's Law
What is equal volumes of gases at identical pressures and temps, have the same number of particles
What is 103g N
Write the skeleton equation for the following reaction:
Heating copper(II) sulfide in the presence of diatomic oxygen produces pure copper and sulfur dioxide gas.
What is CuS + O2 --> Cu + SO2 (g)
and you write "heat" above the arrow
2K + 2H2O --> 2KOH + H2
What is single replacement
Use the concept of the mole to find the molar mass of calcium sulfate.
What is 136.2 g/mol
At STP, what volume is occupied by 6.7 mol H2?
What is 1.5x102 L H2
The empirical formula of a compound with 67.6% Hg, 10.8% S, and 21.6% O
What is HgSO4
Complete and balance the equation:
Al + Cl2 -->
What is 2Al + 3Cl2 --> 2AlCl3
Classify the reaction:
2HgO --> 2Hg + O2
What is decomposition
Use the concept of a mole to calculate the mass, in grams, of 2.50 mol of iron(II) hydroxide
What is 225 grams Fe(OH)2
The volume, in liters, of 96.5 g of neon at STP
What is 0.213 L Ne
Calculate the percent composition of oxygen in the compound sodium hydrogen sulfate
What is 53.3% O
Use the law of conservation of mass to write and balance the chemical reaction for the reaction of carbon with oxygen to form carbon monoxide.
What is 2C + O2 --> 2CO
Classify the reaction:
4Mg + Cl2 --> 2Mg2Cl
What is combination or synthesis
Use the mole concept to determine the number of atoms in 1.14 mol of sulfur trioxide.
What is 2.75x1024 atoms SO3
The density of krypton gas at STP
What is 3.74 g/L
The molecular formula of ethylene glycol, which is used in antifreeze. The molar mass is 62.0 g/mol, and the empirical formula is CH3O.
What is C2H6O2
Alkali metals from Group 1A, like sodium, are a fire hazard because they react violently with water, producing hydrogen gas, sodium hydroxide, and heat. Write a balanced equation for this reaction.
What is 2Na(s) + 2H2O(l) --> H2(g) + 2NaOH(aq) + heat
Iron will replace copper from a copper compound in solution, but iron does not similarly replace zinc or calcium because of
What is the activity series