26 Which substance is an electrolyte?(1) C6H12O6(s) (3) NaOH(s)(2) C2H5OH(L) (4) H2(g)
Answers
Answer: Option (3) is the correct answer.
Explanation:
When a compound dissolved in solution dissociates into ions then the solution is able to conduct electricity is known as an electrolyte.
This means that ionic molecules are able to conduct electricity because they are able to dissociate into ions.
Thus, we can see that out of the given options NaOH is ionic in nature hence, it is an electrolyte.
Whereas ,
, and
are not ionic in nature therefore, they are not electrolyte.
Final answer:
An electrolyte is a substance that produces an electrically conducting solution when dissolved in water. Electrolytes are typically salts that dissociate into ions. Out of the given options, NaOH is an electrolyte as it can dissociate into Na+ and OH- ions. The correct option is 3.
Explanation:
An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water. It is typically formed when a salt dissociates into its component ions.
The free ions in the solution interact with the polar solvent (water), allowing the solution to conduct an electric current. In the options given, NaOH(option 3) is considered an electrolyte as it can dissociate into Na+ and OH- ions, thereby allowing the solution to conduct electricity.The correct option is 3.
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Related Questions
How many joules are absorbed in a process that absorbs 0.5720 kcal?
Mindy and her lab partner conducted flame tests of several metallic salt solutions. They dipped a wire loop into each salt solution, and one by one, heated the sample in the Bunsen burner flame. Based on their results, which element produced a colored light with the lowest energy?A) barium B) calcium C) copper D) potassium
What type of reaction occurs between Mg and HCl and explain why?
An antacid tablet containing 0.50 g of NaHCO3 is dissolved in 250 mL of water. What is the molar concentration of NaHCO3 in the solution?
(2) It has a mass of 0 and a charge of –1.
(3) It has a mass of 0 and a charge of 0.
(4) It has a mass of 4 and a charge of +2.
Answers
the mass of the substance
c.
the change in temperature
b.
the specific heat of the substance
d.
the density of the sample
Answers
To calculate the amount of heat absorbed as a substance melts, the information which we don't need is density.
What is the formula to calculate absorbed heat?
The formula which we used to calculate the amount of involved heat in a chemical reaction is:
Q = mcΔT, where
- Q = absorbed heat
- m = mass
- c = specific heat
- ΔT = change in temperature
Hence the information which we don't need is density.
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B. kilogram.
C. gram.
D. nanometer.
Answers
Answers
Ca(OH)2 + 2HCl —> CaCl2 + 2H2O
Stoichiometry of Ca(OH)2 to HCl is 1:2
Number of Ca(OH)2 moles present - 0.001 mol/L / 1000 mL/L x 25 mL
Number of Ca(OH)2 moles = 2.5 x 10^(-5) mol
Number of HCl moles needed for neutralisation = 2.5 x 10^(-5) mol x2 = 5 x 10 ^(-5) mol
The molarity of HCl solution is 0.005 M
The solution contains 0.005 mol in 1000 mL
Therefore volume of 5x10^(-5) mol in = 1000/0.005 x 5 x 10^(-5) mol = 10 mL
10 mL of HCl is needed for neutralisation
changes from 53.0 atm to 35.2
atm, the temperature changes
from
°C to 12.0°C.
Please help I will give brainliest
Answers
Answer:
To determine the relationship between pressure and temperature in this scenario, we can use the ideal gas law.
The ideal gas law states that PV = nRT, where P represents pressure, V represents volume, n represents the number of moles of gas, R is the ideal gas constant, and T represents temperature in Kelvin.
Since we only have the initial and final pressures and temperatures, we can compare them using the ideal gas law equation by setting up the following ratio:
(P₁T₁) / (P₂T₂) = (V₁n₁R) / (V₂n₂R)
Since the volume, number of moles, and gas constant remain constant, we can simplify the equation:
(P₁T₁) / (P₂T₂) = 1
Now, we can substitute the given values into the equation:
(53.0 atm * T₁) / (35.2 atm * 12.0°C) = 1
To solve for T₁, we need to convert 12.0°C to Kelvin by adding 273.15:
(53.0 atm * T₁) / (35.2 atm * (12.0 + 273.15) K) = 1
Simplifying the equation further:
(53.0 atm * T₁) / (35.2 atm * 285.15 K) = 1
Now, we can solve for T₁:
(53.0 atm * T₁) = (35.2 atm) * (285.15 K)
Dividing both sides of the equation by 53.0 atm:
T₁ = (35.2 atm * 285.15 K) / 53.0 atm
Calculating the numerical value:
T₁ ≈ 189.5 K
Therefore, when the pressure changes from 53.0 atm to 35.2 atm, the temperature changes from approximately 12.0°C to 189.5 K.
Answers
Final answer:
The current in a circuit is governed by voltage and resistance, as dictated by Ohm's Law. The voltage-current relationship can be linear in ohmic materials or nonlinear in non-ohmic materials.
Explanation:
The current flowing in a circuit depends primarily on two variables: voltage and resistance. This relationship is defined through Ohm's Law, which states that the current (I) in a circuit is equal to the voltage (V) divided by the resistance (R), or I=V/R.
When the voltage increases while the resistance remains constant, the current will increase. Conversely, when the resistance increases while the voltage remains constant, the current will decrease. Thus, for example, if the resistance doubles, the current is cut in half.
However, it is important to note that not all materials follow this linear relationship. Some materials, known as ohmic materials, follow Ohm's Law, while others, known as non-ohmic materials, exhibit a nonlinear voltage-current relationship.
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