Answer:
1.29* 10^2
Explanation:
multiply them and then round
Q=mcθ
m= 0.0775 kg
c= 4184 J·kg−1·K−1.
θ= T(final) - T(initial), 95-(-8)
Q=33398.78 J so kJ divide 1000
= 33.39878 kJ
The pH at 25.0 °c of an aqueous solution that is 0. 100 m in acetic acid is 5.744.
<h3>What is ka expression?</h3>
The acid dissociation constant is the equilibrium constant of an acid's dissociation reaction.
The ka is given
From the equation pf ka for weak acid
Putting the values in the equation
Now, the
Thus, the pH of acetic acid is 5.744
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The answer would be D. (The 4th one listed).
Abiotic factors are the non-living parts of the environment that can often have a major influence on living organisms.
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Answer:
This is a physical change because it's not permanent and no chemical reaction occurs. Mixtures - Mixing together materials where one is not soluble in the other is a physical change. Note the properties of a mixture may be different from its components.
Explanation:
The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.
In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. Some example of physical change are freezing of water, melting of wax, boiling of water....