Chemistry 104 FINAL Exam | Questions & Answers (100 %Score) Latest Updated
2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions
How many significant figures are in the number 3,200 - 2
How many grams of aspirin are contained in a 550-mg tablet? - 0.550 g
Convert 36 degrees Celsius to Kelvin. - 309 K
The number of proton and neutrons in an atom determine? - The atomic mass
Elements in the same group have the same number of____. - Valence electrons
6.02 x 10^23 is______. - Avogadro's number
How many electrons can occupy the second(n=2) shell? - 8
Is rust a chemical change or a physical change? - Chemical
Which element has the highest ionization energy? - fluorine
Covalent bonds are bonds that share electrons between atoms and usually occur between _____. - non-
metals
The electron configuration of chlorine is 1s22s22p63s23p5. Which statement about chlorine is
incorrect?
A) chlorine has five valence electrons.
B) chlorine's valence shell is the third shell.
C) chlorine has five electrons in the 3p subshell.
D) chlorine has 17 total electrons. - A) chlorine has five valence electrons.
, The trend for electronegativity and ionization on the periodic table is____ - going left to right across a
row and up a column.
What is the bond angle for a bent bond? - 120 degrees
What is the mass of 3.81 mol of PH3 (MM = 34.0 g/mol)? - 130 g
How many iron atoms are in 0.32 mol of Fe2O3? - 3.9 x 10^23 iron atoms
Zinc-silver oxide batteries are used in cameras and hearing aids. Identify the oxidizing agent and the
reducing agent in the following redox reaction: - Zn is the reducing agent and Ag2O is the oxidizing
agent.
What type of reaction occurs between HBr + KOH ---> H2O + KBr? - Double replacement
1) How many moles of sulfur trioxide are formed from 3 moles of sulfur dioxide using the given balanced
equation? 2 SO2 + O2 -----> 2 SO3 - 3 mol of SO3
Suppose the theoretical yield in a reaction is 10.5 g and the percent yield is 75.5%. What is the actual
yield of product obtained? - 7.93 g
Which molecules in nitromethane have lone pairs?, and does it have a resonance structure? - Yes it has
a resonance structure and the Oxygen molecules have lone pairs.
In the reaction: 2 C2H6(g) + 7 O2(g) -----> 4 CO2(g) + 6 H2O(g), increasing the concentration of C2H6(g)
will - Decrease the reaction rate
When the pressure of a reaction at equilibrium decrease, in which direction does the equilibrium shift? -
The equilibrium shifts in the direction that increases in the number of moles of gas.
2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions
How many significant figures are in the number 3,200 - 2
How many grams of aspirin are contained in a 550-mg tablet? - 0.550 g
Convert 36 degrees Celsius to Kelvin. - 309 K
The number of proton and neutrons in an atom determine? - The atomic mass
Elements in the same group have the same number of____. - Valence electrons
6.02 x 10^23 is______. - Avogadro's number
How many electrons can occupy the second(n=2) shell? - 8
Is rust a chemical change or a physical change? - Chemical
Which element has the highest ionization energy? - fluorine
Covalent bonds are bonds that share electrons between atoms and usually occur between _____. - non-
metals
The electron configuration of chlorine is 1s22s22p63s23p5. Which statement about chlorine is
incorrect?
A) chlorine has five valence electrons.
B) chlorine's valence shell is the third shell.
C) chlorine has five electrons in the 3p subshell.
D) chlorine has 17 total electrons. - A) chlorine has five valence electrons.
, The trend for electronegativity and ionization on the periodic table is____ - going left to right across a
row and up a column.
What is the bond angle for a bent bond? - 120 degrees
What is the mass of 3.81 mol of PH3 (MM = 34.0 g/mol)? - 130 g
How many iron atoms are in 0.32 mol of Fe2O3? - 3.9 x 10^23 iron atoms
Zinc-silver oxide batteries are used in cameras and hearing aids. Identify the oxidizing agent and the
reducing agent in the following redox reaction: - Zn is the reducing agent and Ag2O is the oxidizing
agent.
What type of reaction occurs between HBr + KOH ---> H2O + KBr? - Double replacement
1) How many moles of sulfur trioxide are formed from 3 moles of sulfur dioxide using the given balanced
equation? 2 SO2 + O2 -----> 2 SO3 - 3 mol of SO3
Suppose the theoretical yield in a reaction is 10.5 g and the percent yield is 75.5%. What is the actual
yield of product obtained? - 7.93 g
Which molecules in nitromethane have lone pairs?, and does it have a resonance structure? - Yes it has
a resonance structure and the Oxygen molecules have lone pairs.
In the reaction: 2 C2H6(g) + 7 O2(g) -----> 4 CO2(g) + 6 H2O(g), increasing the concentration of C2H6(g)
will - Decrease the reaction rate
When the pressure of a reaction at equilibrium decrease, in which direction does the equilibrium shift? -
The equilibrium shifts in the direction that increases in the number of moles of gas.
