Answer:
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Explanation:
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Answer
is: V<span>an't
Hoff factor (i) for this solution is 1,81.
Change in freezing point from pure solvent to
solution: ΔT =i · Kf · b.
Kf - molal freezing-point depression constant for water is 1,86°C/m.
b - molality, moles of solute per
kilogram of solvent.
</span><span>b = 0,89 m.
ΔT = 3°C = 3 K.
i = </span>3°C ÷ (1,86 °C/m · 0,89 m).
i = 1,81.
All 3 objects have the same mass
(average mass of an apple) x (average number of apples in a bag) .
The answer is exact.
Answer: Interstellar dust is effective at blocking visible light because dust grains are so small.
Explanation: To find the answer, we need to know more about the interstellar dust.
<h3>What is interstellar dust?</h3>
- Interstellar dust developed from dying stars as they burn out.
- This dust can block the visible light as well as UV emerging from the stars, because dust grains can block light at optical wavelengths.
- it absorbs and scatters blue light more than red. thus, red light can pass through it.
- If we place a star behind the dust, it will look more redder than its usual color. This is called interstellar reddening.
- Grains have a typical size of .
Thus, we can conclude that, Interstellar dust is effective at blocking visible light because dust grains are so small.
Learn more about the interstellar dust here:
brainly.com/question/28044836
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