Answer:
Nope, not a chemical change.
Explanation:
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Answer: Option A) the total energy of the universe is constant.
Explanation:
The first law of thermodynamics is also known as the law of conservation of mass.
And it states that matter is neither created nor destroyed during a chemical reaction but changes from one form to another.
Thus, the total energy of the universe is constant (neither created nor destroyed).
photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
The difference of molarity and molality is in the units:
Molarity is expressed in mol solute / L solution;
<span> while Molality is
expressed in mol solute / kg solvent</span>
Since no other data is given, let us assume that the
contribution of methanol on the total volume is negligible. So that,
Molality = (20.3 mol / L) (1 L / 0.858 kg)
Molality = 23.66 m
<span>The closest answer is letter C. 23.7 m</span>
