Answer:
5 kJ/g
Explanation:
There are two energy flows in this reaction.
q₁ = heat from reaction
q₂ = heat to warm the solution
q₁ + q₂ = 0
m₁ΔH + m₂CΔT = 0
Data:
m₁ = 0.258 g
V₂ = 100 mL
C = 4.184 J°C⁻¹g⁻¹
T_i = 22 °C
T_f = 25.1 °C
Calculations
(a) Mass of solution
(b) ΔT
ΔT = T_f - T_i = 25.1 °C - 22 °C = 3.1°C
(c) ΔH
Note: The answer can have only one significant figure because you measured the initial temperature of the water only to the nearest degree.
Answer :
(1) This reaction is a combustion reaction.
(2) This reaction is a decomposition reaction.
(3) This reaction is a combustion reaction.
(4) This reaction is a combination reaction.
(5) This reaction is a combination reaction.
Explanation :
Combination reaction : It is a type pf reaction in which the two or more molecules combine to form a larger single molecule as a product.
Decomposition reaction : It is a type of reaction in which a single larger compound decomposes to give two or more smaller molecules as a product.
Combustion reaction : It is a type of reaction in which a hydrocarbon molecule react with the oxygen molecule to give carbon dioxide and and water as a product.
1.
This reaction is a combustion reaction.
2.
This reaction is a decomposition reaction.
3.
This reaction is a combustion reaction.
4.
This reaction is a combination reaction.
5.
This reaction is a combination reaction.
Explanation:
In a Brønsted-Lowry acid-base reaction, a conjugate acid is the species formed after the base accepts a proton. By contrast, a conjugate base is the species formed after an acid donates its proton.
Proton = H⁺
This means for the molecules that requires us to look for their conjugate bases, we simply remove a proton to it.
a. What are the conjugate bases of the molecules:
i C6H5OH : C6H5O⁻
ii. CH3-SH : CH3-S⁻
iii. CH3-CH2-CO2H : CH3-CH2-COO⁻
The molecules that requires us to look for their conjugate acids, we simply add a proton to it.
b. What are the conjugate acids of the molecules:
i. CH3–(CH2)-CO2- : i. CH3–(CH2)-COOH
ii. CH3–(CH2)-NH2 : ii. CH3–(CH2)-NH3⁺
iii. Ring at right ?
Answer:
I think its it is A
Explanation:
Rust is red in colour, falls off in flakes, and forms when iron is wet. By process of elimination, it must be B.\
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Answer:
See explanation
Explanation:
An intrinsic property is a property that is internal, that is, it characterizes the substance under study. The possession of an intrinsic property depends on the nature of the substance. An intrinsic property does not depend on amount of substance but on the nature of the substance.
Examples of intrinsic properties include; Density. Solubility, Melting Point, Freezing Point, Boiling Point, Conductivity etc.
Intrinsic properties really represent the matter that is being studied. For instance, the boiling point of water will always be 100°c. No other liquid can boil exactly at that temperature. Hence, this intrinsic property can always be used to identify an unknown liquid as water.
The students were right, studying intrinsic properties accurately represent the matter that is being studied.