Thermoplastic and thermosetting
thermoplastic:- they are easily molded and extruded into films, fibres and packaging.For eg. PVC
thermosetting:-they are hard and durable and can be used for aircraft parts,tires and auto parts .For eg. phenolic resins.
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Answer:
pH = 13.1
Basic
Explanation:
Step 1: Given data
Hydrogen ion concentration ([H⁺]): 6.7 × 10⁻¹⁴ M
Step 2: Calculate the pH of the solution
We will use the definition of pH.
pH = -log [H⁺]
pH = -log 6.7 × 10⁻¹⁴ = 13.1
- When pH < 7, the solution is acid.
- When pH = 7, the solution is neutral.
- When pH > 7, the solution is basic.
Since pH > 7, the solution is basic.
Answer:
92.6%
Explanation:
Hello there!
In this case, according to the first-order kinetics, we can write:
Whereas we need to know the rate constant in order to compute the percentages, given the half-life:
In such a way, we can now compute the fraction in which the reaction has been completed after 3 hrs:
And the percent would be 92.6% after multiplying the fraction by 100 %.
Best regards!
<span>26.35 ml NaOH x (.1650 moles NaOH / 1000 ml ) x (1 mole H2SO4 / 2 moles NaOH) = moles H2SO4 = .002174 moles H2SO4
molarity of H2SO4 = .002174 / .035 L = .06211 M</span>