Vocab/Equations
This states that mass can neither be created nor destroyed
The law of conservation of mass
Mg(s) + 2HCl(aq) → MgCl2(aq) +H2(g)
if 2 mol of Mg reacts, how many mol of each product are produced?
2 mol MgCl2 and 2 mol H2
Convert 25.0 grams of KMnO4 to moles
0.158 moles
Convert 92.8 liters of N2 gas at STP to moles
4.14 moles
What do the coefficients in a balanced chemical equation indicate about the substances in the equation?
(1) mass ratios
(2) mole ratios
(3) empirical formulas
(4) molecular formulas
(2) mole ratios
What determines the amount of product that can be formed?
The limiting reactant
6CO2 +6H2O --> C2H12O6 + 6O2
How many moles of carbon dioxide are needed to react with 3.25 mol of water?
3.25 moles
Calculate how many moles are in 17.0 grams of H2O2
0.5
Convert 32 moles of Argon gas to liters at STP
716.8 liters at STP
C2O5OH(l)+3O2(g)->2CO2(g)+3H2O(l)+energy
The mole ratio of oxygen molecules to CO2 molecules is
Coefficients in equations are ____ of moles
ratios
How many moles of carbon dioxide are there in a 22g sample of the compound?
0.5 moles
2 NaCl → 2 Na + Cl2
How many grams of sodium chloride are required to make 0.32 moles of chlorine?
37g NaCl
How many moles are in 3.7 L of H2 gas at STP?
0.17 moles
Cl2(g) + 2I-(aq) -> 2Cl-(aq) + I2(s)
What is the number of moles of electrons gained by Cl2(g) when 2.0 moles of electrons are lost by I-(aq)?
2.0 moles
What is the equation for percent yield?
(actual yield/theoretical yield)(100)
N2+3H2 -> 2NH3
Given 2.5 moles of NH3, how many liters of N2 would you need?
28 liters of N2
2H2 + O2 -> 2H2O
Given 8g of H2, how many grams of H2O are produced?
71.37g H2O
If 55 liters of N2 reacts with excess H2, what volume of NH3 will be produced if the reaction is carried out at STP?
110L NH3
2KI + F2 → 2KF + I2
When 2.0 moles of electrons are gained by fluorine, how many moles of electrons are lost by iodine?
2.0 moles
What do you call the measured amount of a product obtained from a reaction?
actual yield
N2+3H2 -> 2NH3
Given 10.1 liters of N2, how many moles of NH3 would be created?
0.9 moles NH3
2 Ga2O3 → 4 Ga + 3 O2
How many grams of oxygen can be produced from 15.2 grams of gallium oxide?
3.89 g O2
Calculate the volume of hydrogen gas at STP generated by a reaction between 5g of Na and excess water
2.44L H2
4KO2(s) + 2CO2(g) → 2K2CO3(s) + 3O2(g) + energy
Determine the number of moles of K2CO3 produced when 3.50 moles of KO2 completely reacts
1.75 moles