Podcast
Questions and Answers
What does stoichiometry deal with in chemistry?
What does stoichiometry deal with in chemistry?
- Physical properties of chemical compounds
- Chemical bonding between atoms
- The color of chemical substances
- Quantitative relationship among the amounts of reacting chemical species (correct)
What is an empirical formula in chemistry?
What is an empirical formula in chemistry?
- Provides additional information about the properties of a compound
- Specifies the number of atoms in a molecule
- Indicates the physical state of a compound
- Gives the simplest whole number ratio of atoms in a chemical compound (correct)
What is the purpose of predicting reactant quantities in stoichiometry?
What is the purpose of predicting reactant quantities in stoichiometry?
- To determine the types of chemical bonds present
- To choose the most economical way of carrying out a reaction on a commercial scale (correct)
- To measure the color change during a reaction
- To interpret the results of a chemical analysis
What differentiates an empirical formula from a molecular formula?
What differentiates an empirical formula from a molecular formula?
What is important to establish in order to create an atomic weight scale?
What is important to establish in order to create an atomic weight scale?
What key concept is stoichiometry based on?
What key concept is stoichiometry based on?
What is the formula weight of MgCl2?
What is the formula weight of MgCl2?
How many moles of Hydrogen gas are there in 27g of Hydrogen?
How many moles of Hydrogen gas are there in 27g of Hydrogen?
What is the empirical formula of a compound containing 60% Oxygen and 40% Sulfur by mass?
What is the empirical formula of a compound containing 60% Oxygen and 40% Sulfur by mass?
How many Carbon atoms are there in 0.0022 gram of CO2?
How many Carbon atoms are there in 0.0022 gram of CO2?
How many moles of Iron are in 0.5 gram of Iron? (Atomic weight of Fe = 55.85 amu)
How many moles of Iron are in 0.5 gram of Iron? (Atomic weight of Fe = 55.85 amu)
What is the combining ratio in moles, according to the stoichiometry, for the reaction: 2NaI + Pb(NO3)2 -> PbI2 + 2NaNO3?
What is the combining ratio in moles, according to the stoichiometry, for the reaction: 2NaI + Pb(NO3)2 -> PbI2 + 2NaNO3?
