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Chemistry
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ACR
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View all questions and answers
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50
Which "exotic salt" can lower water's freezing point by 70 °C?
May 5, 2019
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30
Is "Sulfuric acid... makes a poor electrolyte... very little of it will dissociate into ions" really true? What does that actually mean?
Jun 17, 2021
answer
27
Why is solubility often listed as a chemical property? Isn't the action of dissolving just a physical change?
Apr 9, 2020
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27
Why does hydrogen burn with a pale blue flame while its emission spectral lines are red in colour?
Apr 11, 2021
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23
Commercial chalk for kids composition
Apr 27, 2020
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23
True or false: "A used AA battery contains fewer moles of electrons than a new AA battery."
Nov 26, 2021
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22
Why does the graph of the electrical conductivity of sulfuric acid/water solutions have this knee in the ~85%-~92% range?
Jun 19, 2021
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22
What is the difference between "vapour" and "gas"?
Apr 19, 2021
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21
How is hair tissue mineral analysis performed?
Jun 19, 2019
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19
What would be the effect of adding liquid beyond the calibration mark on a volumetric flask?
Aug 30, 2020
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Is habitual down voting considered okay?
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30
What does it mean by "d-ism of Leibniz" and "dotage of Newton" in simple English?
26
Who coined the term "signal-to-noise ratio" and when did statisticians start using the term "noise" to describe randomness?
24
Origin of the term "sinc" function
23
What type of abrasive grit was used to grind lenses for telescopes?
17
What is the origin of the rubber sheet analogy?