Answer:
C. zero 0
Explanation:
single elements will always possess an oxication number of zero
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A 83.5 g sample of a nonelectrolyte is dissolved in 291.7 g of water.
The solution is determined to have a boiling point of 102.3 °C. What is
the molar mass of the compound? (Kb for water is 0.510 °C/m).
The molar mass of the compound is = 1.42g/ mol
Calculation of compound molar mass∆Tb = kB × molarity
∆Tb = 102.3°C
Kb = 0.510 °C/m
Molarity= electrolyte mass × water solubility/ Mw× mass of water.
That is,
102.3°C= 0.51× 83.5×1000/Mw × 291.7
Make Mw the subject of formula,
Therefore,
Mw = 0.51 × 83.5×1000/ 102.3 × 291.7
Mw= 42,585/29,840.91
Mw= 1.42g/mol
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Which of the following IS a part of the Kinetic Molecular Theory (KMT)?
Group of answer choices
A. Molecules in a gas move slowly.
B. Molecules in a gas move rapidly.
C. Molecules have HUGE volumes.
D. Molecules have predictable motions.
The statement that is a part of Kinetic Molecular Theory (KMT) is Molecules in a gas move rapidly. That is option B.
What is Kinetic Molecular Theory (KMT)?Kinetic Molecular Theory (KMT) is defined as the theory that describes the physical behaviour of gases.
The Kinetic Molecular Theory (KMT) include the following:
Ideal gas molecules are constantly moving; They have negligible volume;They have negligible intermolecular forces; They undergo perfectly elastic collisions; and They have an average kinetic energy proportional to the ideal gas's absolute temperature.Therefore, the statement that is a part of Kinetic Molecular Theory (KMT) is Molecules in a gas move rapidly.
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12.2 g of N₂ gas at 1132 torr and 91°C has a volume of
Answer:
8.73 L
Explanation:
First, you need to convert grams to moles using the molar mass.
Molar Mass (N₂): 2(14.009 g/mol)
Molar Mass (N₂): 28.018 g/mol
12.2 grams N₂ 1 mole
---------------------- x ------------------------ = 0.435 moles N₂
28.018 grams
To find the volume, you need to use the Ideal Gas Law:
PV = nRT
In this equation,
-----> P = pressure (torr)
-----> V = volume (L)
-----> n = moles
-----> R = Ideal Gas constant (62.36 torr*L/mol*K)
-----> T = temperature (K)
After converting the temperature from Celsius to Kelvin, you can plug the given values into the equation.
P = 1132 torr R = 62.36 torr*L/mol*K
V = ? L T = 91 °C + 273.15 = 364.15 K
n = 0.435 moles
PV = nRT
(1132 torr)V = (0.435 moles)(62.36 torr*L/mol*K)(364.15 K)
(1132 torr)V = 9888.015
V = 8.73 L
Hydrochloric Acid would best be described as a:
Group of answer choices
A. Arrhenius, BrØnsted-Lowrey and Lewis Base
B. Arrhenius, BrØnsted-Lowrey and Lewis Acid
C. BrØnsted-Lowrey and Lewis Acid
D. Arrhenius and Lewis Acid
Hydrochloric acid would best be described as a Arrhenius acid, Lewis acid and Brønsted-Lowry acid (option B).
What is Arrhenius, Brønsted-Lowry acid?Arrhenius acid is any substance that dissociates in an aqueous solution to form hydrogen ions (H+) or proton.
On the other hand, a Brønsted-Lowry acid is any substance that can donate a proton or hydrogen ion to another substance.
Hydrochloric acid (HCl) can be categorized as an Arrhenius acid and Brønsted-Lowry acid because it has the ability to donate H+ and increase the hydrogen ion concentration of an aqueous solution.
Also, Lewis cids are the chemical substances that are able to accept electron pairs.
Therefore, Hydrochloric acid would best be described as a Arrhenius acid, Lewis acid and Brønsted-Lowry acid.
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A mixture of 0.600 mol of bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C.
Br2(g) + I2(g) ↔ 2IBr(g)
When the mixture has come to equilibrium, the concentration of iodine monobromide is
1.190 M. What is the equilibrium constant for this reaction at 350°C? Show step-by step explanation.
A) 3.55 × 10^3
B) 1.24
C) 1.47
D) 282
E) 325
The equilibrium constant for this reaction at 350°C is D. 282.
Equilibrium constantA dynamic chemical system approaches chemical equilibrium constant when enough time has passed and its composition no longer exhibits any discernible propensity to change further. The equilibrium constant of a chemical reaction is the value of its reaction quotient in this condition. The equilibrium constant is independent of the initial analytical concentrations of the reactant and product species in the mixture for a specific set of reaction conditions. Understanding equilibrium constants is crucial for comprehending many chemical systems as well as biological processes like the transport of oxygen by hemoglobin in the blood and the maintenance of acid-base homeostasis in the human body. There are many different kinds of equilibrium constants, including stability constants, formation constants, binding constants, association constants, and dissociation constants.
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A mixture of 0.600 mol of bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C.
Br2(g) + I2(g) ↔ 2IBr(g)
When the mixture has come to equilibrium, the concentration of iodine monobromide is
1.190 M. What is the equilibrium constant for this reaction at 350°C? Show step-by step explanation.
A) 3.55 × 10^3
B) 1.24
C) 1.47
D) 282
E) 325
At the triple point on a phase diagram, what state(s) of matter exist?
Group of answer choices
A. Liquid ONLY
B. None of the 3 states of matter (Solid, Liquid or Gas) exist at this point.
C. Solid, Liquid and Gas
D. Solid and Liquid
At the triple point on a phase diagram, the state(s) of matter exist is option C: Solid, Liquid and Gas.
What states of matter exist at the triple point?In a state of pressure and temperature of a given triple point, all three phases (known to be the solid, liquid and gas state) are seen to often exist in equilibrium.
Note that the triple point is said to be one that stands for the lowest pressure in which a liquid phase can live in equilibrium with that of the solid or vapor.
Hence, the statement of At the triple point on a phase diagram, the state(s) of matter exist is option C: Solid, Liquid and Gas is true.
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#44) Draw the complete chemical equation for the hydrohalogenation reaction of 1-
pentene by HBr. You must show the structures in your reaction; you may NOT use
molecular formulas!
Hydrohalogenation Reaction:
The substitution of hydrogen and halide levels across a double bond takes place. The halide group is connected to the carbon with more substituents. The product will affect by the presence of peroxide
What is the hydrohalogenation reply with example?
Ethene is a symmetrical alkene having two carbon atoms. It reacts with HBr in the presence of CCl4, producing bromoethane or ethyl bromide (CH3CH2Br). Propene is an unsaturated alkene consisting of a three-carbon chain with two carbon particles on either side of the double bond.
What is the hydrohalogenation reaction with example?Ethene is a symmetrical alkene including two carbon atoms. It reacts with HBr in the presence of CCl4, producing bromoethane or ethyl bromide (CH3CH2Br). Propene is an unsaturated alkene consisting of a three-carbon chain with two carbon atoms on either flank of the double bond.
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10. A 10.9ml sample of gas is collected over water at 21.0 C and 1.89 atm , what volume would you have at 25.0 C and 2.25 atm
Considering the combined law equation, you would have a volume of 9.28 mL at 25.0 C and 2.25 atm.
Boyle's lawBoyle's law establishes the relationship between the pressure and the volume of a gas when the temperature is constant.
This law says that volume is inversely proportional to pressure: if pressure increases, volume decreases, while if pressure decreases, volume increases.
Mathematically, Boyle's law states that the multiplication of pressure by volume is constant:
P×V= k
Charles's lawCharles's law establishes the relationship between the temperature and the volume of a gas when the pressure is constant.
This law says that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases, while if the temperature of the gas decreases, the volume decreases.
Mathematically, Charles' law states that the ratio of volume to temperature is constant:
[tex]\frac{V}{T}=k[/tex]
Gay-Lussac's lawGay-Lussac's law establishes the relationship between the temperature and pressure of a gas when the volume is constant.
This law says that the pressure of the gas is directly proportional to its temperature: if the temperature increases, the pressure increases, while if the temperature of the gas decreases, the pressure decreases.
Mathematically, Gay-Lussac's law states that the ratio of pressure to temperature is constant:
[tex]\frac{P}{T}=k[/tex]
Combined law equationCombined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:
[tex]\frac{PV}{T}=k[/tex]
Considering an initial state 1 and a final state 2, the following holds:
[tex]\frac{P1V1}{T1}=\frac{P2V2}{T2}[/tex]
Volume in this caseIn this case, you know:
P1= 1.89 atmV1= 10.9 mLT1= 21 C= 294 K (being 0 C= 273 K)P2= 2.25 atmV2= ?T2= 25 C= 298 KReplacing in the combined law equation:
[tex]\frac{1.89 atmx10.9 mL}{294 K}=\frac{2.25 atmxV2}{298 K}[/tex]
Solving:
[tex]\frac{1.89 atmx10.9 mL}{294 K}\frac{298K}{2.25 atm} =V2[/tex]
9.28 mL= V2
Finally, you would have a volume of 9.28 mL at 25.0 C and 2.25 atm.
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which water boils can be related to the weather.
Quick boiling of water can be related to the hot weather because in high temperature water changes from liquid state to gaseous state.
Which water boils can be related to the weather?Water boils quickly when the weather is hot and warm because hot weather has high temperature which leads to the quick evaporation of the water. In hot weather, the liquid water changes into vapor state very quickly as compared to cold temperature.
So we can conclude that Quick boiling of water can be related to the hot weather because in high temperature water changes from liquid state to gaseous state.
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