Definitions
The name of the tool used to hep guide u through stoichiometry
What is Flow chart
Volume @STP (Standard Temperature Pressure)
what is 22.4L
The reaction and conversion in a flow chart aren't reversible
No they are reversible
6.27 grams of aluminium is placed in a balloon containing 142mL of 2.1M sulfuric acid. how large will the balloon become assuming the balloon is closed before the reaction begins and the reaction occurs at stp?
Al + H2So4 ---> Al2(so4)3 + 3H2
6.27g Al x 1L/26.98gAl x 3 mol H2/2 mol Al x 22.4L/1mol H2= 7.81L H2
142mL x 1L/1000mL x 2.1 mol H2So4/1L x 3 mol H2/ 3 mol H2so4 x 22.4L /mol H2= 6.68L H2
Mg + 2HCl --> MgCl2 + H2 How many grams of hydrogen will be produced if we start with 2 moles of hydrochloric acid and excess magnesium?
What is 2 g H2?
The amount of space a substance takes up
What is Volume
Avogadro's number
What is 6.022 * 10^23
What tools are needed to go from Mole(s) to volume @STP (or Volume @STP to Mole(s))
What is to multiply or divide by 22.4L
calculate the mass of ammonia that could be produced with 55.8L of hydrogen at STP
55.8L H2 x 1/22.4L x 2 mol NH3/ 3 mol Hz x 12.03g NH3/1 mol NH3= 28.3g NH3
Mg + 2HCl --> MgCl2 + H2 What mass of hydrochloric acid (MM=36.5 g/mol) is needed to react with 2.50 moles of magnesium?
What is 182 g HCl?
the weight of a chemical substance, usually in grams
What is Molar mass
The measured amount of product obtained after performing a chemical reaction.
What is actual yield?
The process needed to go from Mole(s) to Mass in grams (or from Mass in grams to Mole(s))
What is to Multiply or divide by Molar mass
how many molecules of nitrogen are needed to produce 12 molecules of ammonia?
12 molecules NH3 x 1 mol NH3/6.022 x 10^23 x 1 mol Hz/ 2 moles of NH3 x 6.022x10^23 molecules/ 1 mol N2=6 molecules of N2
How many moles of aluminum atoms are needed to combine with 1.58 mol of oxygen molecules to make aluminum oxide?
What is 2.1 mol Al?
What are Atoms or Molecules
The ratio of the actual yield to the theoretical yield, multiplied by 100.
What is percent yield?
The process needed to go from Mole(s) to Atoms or Molecules (or from atoms or molecules to Mole(s))
What is to Multiply or divide by 6.022 * 10^23
how many moles of hydrogen are needed to produce 136G of ammonia
136g NH3 x 1 mol NH3/17.031g NH3 x 3 moles Hz/2 moles NH3= 12.0 moles H
Ammonia decomposes to produce nitrogen and hydrogen gases. How many moles of H2 can be formed by the decomposition of 0.145 moles of ammonia?
What is 0.218 mol H2?
What is the term defined by the determination of the proportions in which elements or compounds react with one another
What is stoichiometry
States that mass is neither created nor destroyed during ordinary chemical or physical reactions. (This is why we balance chemical equations!)
What is the law of conservation of mass?
The process needed to go from moles to moles
What is a balanced mole to mole ratio
how many moles of hydrogen are needed to produce 2.00 moles of ammonia?
2.00 moles NH3 x 3 moles Hz/2 moles NH3=3.00 Moles H2
Aluminum oxide reacts with iron to form Fe3O4 and Aluminum. Determine with limiting reactant when 5 moles of aluminum oxide reacts with 7 moles of iron.
What is iron?