pH value is the power of the hydrogen ions concentration in a solution. The more is the concertation more basic will be the solution, Less is the concertation more will be an acidic solution.
Learn more about the pH values indicating the highest concentration.
B- greater thermal conductivity
C- greater thermal insulation
D- a higher R-value
Answer: The correct answer is "greater thermal conductivity".
Explanation:
Thermal conductivity: It is a ability to conduct heat. Heat transfers occur at a lower rate to material at higher thermal conductivity.
It is defined as the rate at which the heat is transferred through a unit thickness of the substance per area per change in the temperature.
In the given problem, A piece of wood and a piece of steel are at the same temperature. However, the steel feels hotter. The thermal conductivity of the steel is more than the thermal conductivity of the wood.
Therefore, the correct option is "greater thermal conductivity".
B- Greater thermal conductivity
Answer:
Ionic bond is formed by the cations and anions and their attractive forces.
c. Mass number
d. Twice the number of protons
The number 84 in the name krypton-84 represent its mass number.
The total number of neutrons and protons in an atom are calculated to determine the mass number.
The smallest component of an element, an atom, combines with other atoms to form molecules, which make up the majority of the universe's things.
The total number of protons and neutrons in an atom's nucleus is known as the mass number in nuclear physics. The mass number is frequently used to distinguish between an element's isotopes.
A specific element can only be created from one type of atom, e.g., diamond can only be created from carbon atoms and gold can only be created from gold atoms. Protons, neutrons, and electrons make up the atoms.
Therefore, The number 84 in the name krypton-84 represent its mass number.
To learn more about mass number, refer to the link:
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1.0 M ionic sodium chloride (NaCl)
1.0 M ionic calcium bromide (CaBr2)
1.0 M ionic aluminum bromide (AlBr3)
1.0 M ionic potassium chloride (KCl)
Answer: 1.0 M molecular sucrose (C₁₂H₂₂O₁₁).
Explanation:
1) The depression of the freezing point of a solvent when you add a solute is a colligative property.
2) Colligative properties are those physical properties of solutions that depends on the number of solute particles dissolved into the solution.
3) The relation between the number of solute particles and the depresson of the freezing point is proportional: the greater the number of solute particles the greater the freezing point depression.
4) You need to find the solution with the highest freezing point, this is the solution in which the freezing point decreased the least.
5) Then, that is the solution with least number of solute particles.
6) Since all the given solutions have the same molarity (1.0 M), you only have to deal with the possible ionization of the different solutes.
7) NaCl, CaBr₂, AlBr₃, and KCl are ionic compounds, so each unit of them will ionize into two, three, four, and two ions, respectively, while sucrose, being a covalent compound does not dissociate.
Then, 1.0 M solution of sucrose will have less solute particles than the others, and will exhitibit the lowest freezing point depression, meaning that it will have the highest freezing point of the given solutions.