Answer:
Explanation:
Many elements have one or more isotopes that are radioactive these are called radioisotopes their their nuclei are unstable so they break now or decay and emit radiation
Explanation:
Water molecules are polar, so they form hydrogen bonds. This is a unique property of water. Water has an unique boiling point and high polarity.
Answer:
k' = (2.0345 × 10⁻⁸) M/s.
Explanation:
Beer-Lambert's law explains that Absorbance is directly proportional to the concentration of the substrate under consideration.
A ∝c
A = εlc
where ε = molar absorptivity constant = 87,000 M⁻¹cm⁻¹
l = path length of the solution that the light passes through in cm = 1 cm for most cases.
c = concentration of the substrate.
In terms of rate terms,
A' = εlc'
where A' has units of Absorbance/s
c' = rate of reaction, units of concentration/s
A' = εlc'
From the graph, the slope of the graph = 0.00177 Absorbance/s
0.00177 = 87000 × 1 × c'
c' = (0.00177/87000)
c' = (2.0345 × 10⁻⁸) M/s.
This value is the pseudo rate constant, k'.
Hope this Helps!!!
From the calculations, the heat of the reaction is 44.4 kJ/mol.
<h3>What is the enthalpy of reaction?</h3>
The enthalpy of reaction refers to the amount of heat that is absorbed or evolved in a reaction.
Number of moles of NaOH = 1.1 g /40 g/mol = 0.0275 moles
Mass of the water = 22.1 mL or 22.1 g
Given that;
H= mcdT
H = 22.1 g *4.184 * (31.4 - 18.2)
H = 1221 J or 1.221kJ
ΔH rxn = -(1.221kJ)/0.0275 moles
ΔH rxn = 44.4 kJ/mol
Learn more about enthalpy:brainly.com/question/15319033
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