Answer:
Van't Hoff factor is 1.72 ≅ 2
Explanation:
Let's apply the colligative property of boiling point elevation:
ΔT = Kb . m . i
ΔT = Boiling T° of solution - T° boiling of pure solvent
103.45 °C - 100°C = 0.512 °C/m . 3.90 m . i
3.45 °C / 0.512 m/°C . 3.90 m = i
1.72 = i ≅ 2
Answer:
Evolution in the broadest sense explains that what we see today is different from what existed in the past. Galaxies, stars, the solar system, and earth have changed through time, and so has life on earth.Something that happened in the past is thus not "off limits" for scientific study. Hypotheses can be made about such phenomena, and these hypotheses can be tested and can lead to solid conclusions. Furthermore, many key aspects of evolution occur in relatively short periods that can be observed directly—such as the evolution in bacteria of resistance to antibiotics.Laws, like facts and theories, can change with better data. But theories do not develop into laws with the accumulation of evidence. Rather, theories are the goal of science.
Explanation:
M (NaCl) = n × M = 3.75 × 58.5 =
219.375 g
M (NaCl) = 23 + 35.5 = 58.5 g/mol
Answer:
no, water is a solvent
Explanation:
A solution is a homogeneous mixture of two substances, so water can only be part of a solution when there is something (a solute) mixed with it, like salt, making it salt water.
Hope that helps.
Answer:
only japanese and english I understand sorry your languages
Explanation:
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