1. The study of the amounts or reactants used, and products formed from a chemical reaction is called? a. Chemistry b. Pharmacology c. Stoichiometry d. Physics
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
![1101 Q26 Stoichiometry Calculations
1. The study of the amounts or reactants used, and products formed from a chemical reaction is
called?
a. Chemistry b. Pharmacology
2. Using the following equation, if there are two moles of O₂ available, which mole ratio will tell
you how much water (H₂O) is produced?
a. 4 moles H₂O / 5 moles O₂
C3H8+5023 CO₂ + 4H₂O
a. 1 mole C3H8/ 5 moles O₂
a.
3. Using the following equation, if there are 10 moles of propane (C30s) available, which mole ratio
will tell you how much oxygen (O₂) is required for the reaction to take place?
3 moles
c. Stoichiometry
C3H8 +5023 CO₂ + 4H₂O
Answer 21.2 grams
b. 5 moles 0₂/4 mole H₂O
stoms of
4. How many moles of hydrogen gas (H₂) are needed to react completely with two moles of
nitrogen gas?
8. Zinc was drop
3
H₂ + N₂ 2 NH3
b. 6 moles
b. 5 moles O₂ / 1 mole C3H8
d. Physics
c. 9 moles
9, 110,57 moles of ethane gas (CH) is bumed con
Cu + 2 AgNO3 ----> Cu(NO3)2 + 2Ag
5. How many grams of copper would be needed to replace 72.0 g of silver from a silver nitrate
solution?
6H₂0
d. 12 moles](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb48a0ad8-89de-41be-83b9-433293bf9121%2Fc428df17-347d-4608-bffc-ceced54bab85%2Faul9p6l_processed.jpeg&w=3840&q=75)
![6. How many molecules of aluminum chloride are produced when 72.0g of hydrochloric acid (HCI)
is reacted with excess aluminum?
6HCI + 2AI ---> 2AlCl3 + 3H₂
Answer 3.96 x 1023 molecules
7. How many grams of carbon must be burned to produce 100.0 grams of carbon dioxide?
C + O₂ ----> CO₂
Answer 27.29 grams
8. Zinc was dropped into a solution containing 100.0 g of HCI. How many moles of hydrogen gas
was produced?
Zn + 2HCI ----> ZnCl₂ + H₂
Answer 1.37 moles
fa reach
9. If 0.67 moles of ethane gas (C₂H6) is burned completely, calculate the percent yield if 52.5 grams
of CO₂ were obtained from the reaction.
2C₂H6+
70₂
Answer 89.02%
4CO₂ + 6H₂O
mala](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb48a0ad8-89de-41be-83b9-433293bf9121%2Fc428df17-347d-4608-bffc-ceced54bab85%2Fanqb0c_processed.jpeg&w=3840&q=75)
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