Molality of solution = 0.529 m
mass solvent in kg = 20.6 g => 20.6 / 1000 => 0.0206 kg
number of moles = molality x mass solvent
= 0.529 x 0.0206 => <span> 0.0108 mol benzene
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hope this helps!
Answer:
a liquid
Explanation:
I'm not for sure but I just looked it up
Answer:
9.73 grams of iodine
Explanation:
First we calculate the molar mass of the tyroxine C₁₅H₁₇NO₄I₄:
M = 15 × 12 + 17 × 1 + 1 × 14 + 4 × 16 + 4 × 127 = 783 g/mole
The taking in account that 1 mole of tyroxine have 4 moles of iodine atoms (508 g) we devise the following reasoning:
if from 783 g of tyroxine we can extract 508 g of iodine
the from 15 g of tyroxine we can extract X g of iodine
X = (15 × 508) / 783 = 9.73 grams of iodine
Ionic bond for eg:-NaCl which is very strong
Answer is: acid-base indicator or pH indicators.
Acid-base indicators are usually weak acids or bases and they are chemical<span> detectors for hydrogen or hydronium cations.</span>
Example for acid-base indicator is phenolphthalein (molecular formula C₂₀H₁₄O₄). Phenolphthalein is <span>colorless in </span>acidic<span> solutions and pink in </span>basic<span> solutions.
Another example is m</span><span>ethyl orange. It is red colour in acidic solutions and yellow colour in basic solutions.</span>
