How does the addition of ions affect the rate of fading of dye? Why are anions always larger than the atoms from which they are formed? Explain why 2-bromopropane react with sodium iodide in acetone over 10^4 times faster than bromocyclopropane. Hint: Examine the transition state for each...
When sodium sulphate is dissolved in water, why doesn't it release the ions Na^+, S_2^- and O_2^- ? Why are polyatomic ions not neutral? Do all atoms achieve octet when they bond? Why are ionic compounds brittle and metals malleable? What can you conclude about a melting and...
Why do northern lights happen? When the solar wind gets past the magnetic field and travels towards the Earth, it runs into the atmosphere. ... As the protons and electrons from the solar wind hit the particles in the Earth's atmosphere, they release energy – and this is what causes th...
Acids do not change the colour of red litmus. Bases turn red litmus blue. What is the primary assumption in the Arrhenius theory? What is the basic assumption in the Arrhenius theory? Because acids and bases conduct electric current, they must produce ions in solution. According to the ...
And then you would say well then how do you make a battery that has any lifetime at all if the electrolyte reacts with the electrodes? But by luck and by chance, when the reaction occurs, the reaction products turn out to be... solid on the negative electrode. They form a...
I don’t think soon because currently every platform has pros and cons. Obviously, I think superconductors are much better than everything else. [That said], the neutral atoms are best for the noisy intermediate scale era that’s what we’re in at the moment. But they, they will have ...
WHY DO WE USE DNA HP? DNA HP is an excellent carrier, particularly of water because it has so many hydrogen bonds. It can deliver 10,000 times its weight in water to the intercellular space of the skin. To complement and support this super power, we use Silver Hydrosol instead of regul...
If Lisp advocates refuse to do this, then we shouldn’t be surprised when these languages remain stuck near the bottom of the charts. 这要求太高了。如果 Lisp 语言如此伟大,那么应该可以用简洁实用的术语来总结它们的好处。应该可以在一小时内演示 Lisp 的强大功能,而不是100小时。如果 Lisp 的...
Why does dichromate (Cr_2O_7^{2-}) have 7 oxygen atoms whereas chromate (CrO_4^{2-}) have only 4, shouldn't dichromate have 8 oxygen instead of 4? Why does copper produce a brighter flame with more colors than sodium? Why do different metals have different characteristic flame test ...
Do all atoms achieve octet when they bond? What is a polar body? Why are molecules with double bonds stronger than those with single bonds? Are triple bonds even stronger than double bonds? Why do hydrogen ions have to bond with hydroxide ions? Can't they bond with something else with ...