Explanation:
The electronegativity difference in C-C and C-H atoms is quite low. This means smaller the electron cloud. This further means larger bond length that is electron's are further from the nucleus. hence, higher potential energy of C-C and C-H bonds.
On the contrary, C-O and H-O have large difference in electronegativity( O is high electronegative element) . This means smaller bond length. Electron's near the nucleus. Thus, lower potential energy of bonds.
_____ compounds include a prefix on the first and second elements and a suffix on the second element, whereas _____ compounds do not have prefixes and only include a suffix on the second element.
The question refers to the method of naming covalent and ionic compounds. Covalent compounds use prefixes for both elements and a suffix for the second, while ionic compounds do not use prefixes and only have a suffix for the second element.
Explanation:
The given question pertains to the rule for naming compounds in chemistry. The two types of compounds referenced in the question are covalent and ionic compounds. In a covalent compound, both the first and second elements have prefixes and the second element has a suffix. An example would be N2O4, which would be named 'Dinitrogen Tetroxide'. However, in ionic compounds, there are no prefixes and only the second element has a suffix. An example would be NaCl, which is named 'Sodium Chloride'.
Learn more about Naming Compounds here:https://brainly.com/question/34194749
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A student carefully drops a 9.0 g solid Zn pellet initially at 50.0°C into an insulated cup containing 30.0 g of water at 27.8°C. The student predicts that the temperature of the water will increase after the pellet is added. Which of the following statements is the best justification for the student's prediction? (A) The metallic bonds between Zn atoms will break when the Zn is exposed to the water molecules, releasing energy that will be absorbed by the water molecules. (B) Collisions between the water molecules and the surface of the Zn pellet will result in the transfer of energy, increasing the average kinetic energy of the water molecules. (C) The strength of the hydrogen bonds between the water molecules will increase when the Zn pellet is added, decreasing the average kinetic energy of the water molecules. (D)Collisions between Zn atoms in the solid will increase in frequency when the Zn is exposed to the water molecules, resulting in the transfer of energy to the surroundings.
Answer: choice B
Explanation: Heat flows from high to low. After you convert the Celsius into kelvin the Zn pellet has 323K and the water has 301K which results the transfer of the heat energy of the pallet to the water. ( you don’t have to convert, but it just make it easier) hope this helped you :)
Answer:
(B) Collisions between the water molecules and the surface of the Zn pellet will result in the transfer of energy, increasing the average kinetic energy of the water molecules.
Explanation:
The question above shows a case of energy transfer and movement of molecules in the generation of heat. Which can be explained as follows:
As you can see, in the question, the solid Zn pellet has a higher temperature than water. There is a physical concept that states that when two bodies of different temperatures come into contact, there is a transfer of energy between them that seeks to equal the temperature of the two bodies. For this reason, when the Zn pellet comes into contact with water, collisions will occur between the water molecules and the surface of the Zn sediment that will result in energy transfer.
However, instead of causing the temperature balance between the water and the Zn tablet, this allows the water to get a higher temperature, because the energy transmitted by zinc increases the kinetic energy of the water molecules. In this case, these tomboys start to move very fast, generating heat.
Identify the solute with the highest van't Hoff factor. And how do you determine which one is highest?
A) AlCl3.
B) KI.
C) CaCl2.
D) MgSO4.
E) non-electrolyte.
Answer : The correct option is, (A) [tex]AlCl_3[/tex]
Explanation :
Van't Hoff factor : It is defined as the ratio of the experimental value of the colligative property to the calculated value of the colligative property.
We can determine the van't Hoff factor by the association and dissociation of the compound.
(A) [tex]AlCl_3[/tex]
It is an electrolyte that dissociates to give aluminum ion and chloride ion.
The dissociation of [tex]AlCl_3[/tex] will be,
[tex]AlCl_3\rightarrow Al^{3+}+3Cl^{-}[/tex]
So, Van't Hoff factor = Number of solute particles = [tex]Al^{3+}+3Cl^{-}[/tex] = 1 + 3 = 4
(B) [tex]KI[/tex]
It is an electrolyte that dissociates to give potassium ion and iodide ion.
The dissociation of [tex]KI[/tex] will be,
[tex]KI\rightarrow K^{+}+I^{-}[/tex]
So, Van't Hoff factor = Number of solute particles = [tex]K^{+}+I^{-}[/tex] = 1 + 1 = 2
(C) [tex]CaCl_2[/tex]
It is an electrolyte that dissociates to give calcium ion and chloride ion.
The dissociation of [tex]CaCl_2[/tex] will be,
[tex]CaCl_2\rightarrow Ca^{2+}+2Cl^{-}[/tex]
So, Van't Hoff factor = Number of solute particles = [tex]Ca^{2+}+2Cl^{-}[/tex] = 1 + 2 = 3
(D) [tex]MgSO_4[/tex]
It is an electrolyte that dissociates to give magnesium ion and sulfate ion.
The dissociation of [tex]MgSO_4[/tex] will be,
[tex]MgSO_4\rightarrow Mg^{2+}+SO_4^{2-}[/tex]
So, Van't Hoff factor = Number of solute particles = [tex]Mg^{2+}+SO_4^{2-}[/tex] = 1 + 1 = 2
(E) Non-electrolyte
The dissociation non-electrolyte is not possible. So, the Van't Hoff factor will always be, 1.
Hence, the highest van't Hoff factor of solute is, [tex]AlCl_3[/tex]
Van't Hoff factor: It is defined as the ratio of the experimental value of the colligative property to the calculated value of the colligative property.
The correct answer is A) [tex]ALCL_3[/tex]
The van't hoff factor is decided by the number of ions present in the compound.
In option A there are 4 ions that are [tex]AL^3+ and \ CL^-[/tex].
According to the concept, the ions for other options are 4, 1, 3, and, 1 respectively.
The correct option is A.
For more information, refer to the link:-
https://brainly.com/question/22810476
In order to rinse the system of exhaled C02 and meet the inspiratory flow rate requirements of infants placed on B-CPAP, the flow rate of humidified gas should be set at:_________.
Answer:
In order to rinse the system of exhaled CO2 and meet the inspiratory flow rate requirements of infants placed on B-CPAP, the flow rate of humidified gas should be set at:
A. 16 to 20 L/minute
B. 6 to10 L/minute
C. at least 15 L/minute
D. 11 to 15 L/minute
B. 6 to10 L/minute
Explanation:
Bubble CPAP is a non-invasive, external ventilation technique used for newborn babies with infant respiratory distress syndrome (IRDS). Continuous positive airway pressure (CPAP) is given to a spontaneously breathing newborn baby to preserve lung volumes during expiration