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Ne4ueva [31]
2 years ago
11

A star’s parallax angle is 1.0. How far away is the star in light years?

Physics
2 answers:
larisa [96]2 years ago
7 0
Distance = 2AU / tan1.0

If you mean 1.0 is in degrees, then Distance = 114.58 AU
valkas [14]2 years ago
6 0
The distance is 114.58
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Answer:

0.144 kg of water

Explanation:

From Raoult's law,

Mole fraction of solvent = vapor pressure of solution ÷ vapor pressure of solvent = 423 mmHg ÷ 528.8 mmHg = 0.8

Let the moles of solvent (water) be y

Moles of solute (C3H8O3) = 2 mole

Total moles of solution = moles of solvent + moles of solute = (y + 2) mol

Mole fraction of solvent = moles of solvent/total moles of solution

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y = 0.8(y + 2)

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0.2y = 1.6

y = 1.6/0.2 = 8

Moles of solvent (water) = 8 mol

Mass of water = moles of water × MW = 8 mol × 18 g/mol = 144 g = 144/1000 = 0.144 kg

7 0
2 years ago
1 Ten (10) ml aqueous solutions of drug A (10% w/v) and drug B (25% w/v) are stored in two identical test tubes under identical
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Why does a glass rod become positively charged when it is rubbed with a silk cloth?
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The term thermodynamics comes from the Greek words therme (heat)  and dynamis (force)

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Energy can be considered as the ability to cause change.

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