Answer:
it is hard.. harder than some natural gems
C2H2O4 C2HO4- + H+
0.175 - x x x + y
C2HO4- c2o42– + H+
x - y y x + y
K2 = (y) (x +y) / (x-y)
As, y << x
So, K2 = (y) (x) / (x)
K2 = y =6.1 × 10^–5
Hence, concentration of (c2o42–) 6.1 × 10^–5 M
Answer:
continental drift: magma pushing two plates apart and concept of Pangaea
seafloor spreading: oceanic ridges and oceanic plates sliding under continental crust
Explanation: it’s kind self explanatory
Answer: Calcium
Explanation: The chemical element Calcium (Ca), atomic number 20, is the fifth element and the third most abundant <u><em>metal</em></u> in the earth's crust. The metal is trimorphic, harder than sodium, but softer than aluminium.
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Explanation:
It is known that entropy is the measure of degree of randomness present in a substance due to the movement of its molecules.
More randomly the atoms are moving from one place to another more will be the entropy of system.
In order to calculate the entropy, we divide the amount of heat transferred by the temperature at which heat transfer occurs.
As the given temperature is 296.95 K and heat of vaporization is 24.8 kJ/mol. Therefore, calculate the molar entropy of vaporization as follows.
Molar entropy of vaporization =
= 0.08351 kJ/mol K
Thus, we can conclude that molar entropy of vaporization of is 0.08351 kJ/mol K.