Stoichiometry Quiz
Chemistry 1: PROBLEM SET
SY 2012/2013
CLASS #: _______________ NAME_________________________________________ SECTION: ______________________
Stoichiometry II - Mole Calculations/ Limiting and Excess Reagent – Lecture Notes 1. Given the balanced equation N2(g) + 3H2(g) 2NH3(g) How many moles of ammonia are produced when 0.60 mol of nitrogen reacts with hydrogen? 2. Given the equation: SiO2 + HF SiF4 + H2O a. Calculate the number of moles HF that would completely react with 2.5 moles of SiO2. b. Calculate the number of moles SiF4 formed by completely reacting 2.5 moles SiO 2 with HF. c. Calculate the mass of water formed by reacting 2.5 moles SiO 2 with HF.
d. Calculate the number of water molecules formed by reacting 2.5 moles SiO 2 with HF.
e. Calculate the mass of oxygen formed by reacting 2.5 moles SiO 2 with HF. 3. Calculate the number of grams NH3 produced by the reaction of 5.40 grams of hydrogen with an excess nitrogen.
1. The overall reaction for the conversion of sugar(glucose) to acetic acid is: C6H12O6 + 2O2 2CH3COOH + 2CO2 + 2H2O
A given volume of nipa sap contains 69.0 g of glucose. If all of this sugar is fermented , how many grams of acetic acid would be produced?
2. How many molecules of oxygen are produced when 29.2 g of water is decomposed forming hydrogen gas and oxygen gas?
3. Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq). Sodium silicate(Na2SiO3), for example reacts as follows:
1
Na2SiO3(s) + 8 HF(aq) H2SiF6(aq)
+ 2NaF(aq)
+ 3H2O(l)
a. How many moles of HF are needed to react with 0.300 mol Na2SiO3?
b. How many grams of NaF form when 0.500 mol of HF reacts with excess sodium silicate?
c.
How many grams sodium silicate can react with 0.800 g of HF?
4. Automotive air bags inflate when sodium azide, NaN3, rapidly decomposes to its component elements: 2 NaN3(s) 2Na(s) + 3N2 (g) a. How many moles of
SY 2012/2013
CLASS #: _______________ NAME_________________________________________ SECTION: ______________________
Stoichiometry II - Mole Calculations/ Limiting and Excess Reagent – Lecture Notes 1. Given the balanced equation N2(g) + 3H2(g) 2NH3(g) How many moles of ammonia are produced when 0.60 mol of nitrogen reacts with hydrogen? 2. Given the equation: SiO2 + HF SiF4 + H2O a. Calculate the number of moles HF that would completely react with 2.5 moles of SiO2. b. Calculate the number of moles SiF4 formed by completely reacting 2.5 moles SiO 2 with HF. c. Calculate the mass of water formed by reacting 2.5 moles SiO 2 with HF.
d. Calculate the number of water molecules formed by reacting 2.5 moles SiO 2 with HF.
e. Calculate the mass of oxygen formed by reacting 2.5 moles SiO 2 with HF. 3. Calculate the number of grams NH3 produced by the reaction of 5.40 grams of hydrogen with an excess nitrogen.
1. The overall reaction for the conversion of sugar(glucose) to acetic acid is: C6H12O6 + 2O2 2CH3COOH + 2CO2 + 2H2O
A given volume of nipa sap contains 69.0 g of glucose. If all of this sugar is fermented , how many grams of acetic acid would be produced?
2. How many molecules of oxygen are produced when 29.2 g of water is decomposed forming hydrogen gas and oxygen gas?
3. Hydrofluoric acid, HF(aq), cannot be stored in glass bottles because compounds called silicates in the glass are attacked by the HF(aq). Sodium silicate(Na2SiO3), for example reacts as follows:
1
Na2SiO3(s) + 8 HF(aq) H2SiF6(aq)
+ 2NaF(aq)
+ 3H2O(l)
a. How many moles of HF are needed to react with 0.300 mol Na2SiO3?
b. How many grams of NaF form when 0.500 mol of HF reacts with excess sodium silicate?
c.
How many grams sodium silicate can react with 0.800 g of HF?
4. Automotive air bags inflate when sodium azide, NaN3, rapidly decomposes to its component elements: 2 NaN3(s) 2Na(s) + 3N2 (g) a. How many moles of