Which pair has identical electron configurations?
1 answer:
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Generally, 60% of the mass of body is water.
So, amount of water in 100 kg person is:
In order to calculate the mass of a person if all the water were removed, then:
Mass of the body = [
Mass of the content of water in the body =
Substituting the values:
Mass of a person if all the water were removed = .
Hence the mass of a person who weighs will weigh
if all the water were removed from the body.
Answer:
<em>The accurate label for the solution is</em><em> </em><u><em>2.00 mol/L NaCl.</em></u>
Explanation:
Molrity = mass ÷ molar mass
Molar mass of NaCL = 58.44 g/mol
Weighed mass = 116.9g
⇒ Molarity of the solution = = 2.0M
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<em>Therefore, the accurate label for the solution is </em><u><em>2.00 mol/L NaCl.</em></u>
Answer : The correct option is C.
Explanation :
Enthalpy of reaction : It is defined as the changes in heat energy takes place when reactants go to products. It is denotes as .
= Energy of product - Energy of reactant
is positive when heat is absorbed and the reaction is endothermic.
is negative when heat is released and the reaction is exothermic.
In the given potential energy diagram, the energy of product at higher level and energy of reactant at lower level. The for this reaction will be positive.
So, the enthalpy of reaction is defined as the difference of the energy of the reactants and the energy of the products.