超一流的化学高手、化学专家请进(0001)

绝恋天的鸟2022-10-04 11:39:542条回答

超一流的化学高手、化学专家请进(0001)
超一流的化学高手、化学专家请进(Periodicity 0001)
How are binary nonmetal-nonmetal compounds named
How are metal-nonmetal compounds named?
Explain why it is necessary to use the prefixes mono,di,tri,etc.,more often for covalent compounds than for ionic compounds.

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windows0 共回答了19个问题 | 采纳率68.4%: How are binary nonmetal-nonmetal compounds named
译：两种非金属形成的化合物怎么命名?
Ans:put the element which has stronger oxidization(氧化性) behind the weaker one.
How are metal-nonmetal compounds named?
译：金属和非金属形成的化合物怎么命名?
Ans:put the metal element behind the nonmetal one.
Explain why it is necessary to use the prefixes mono(一),di（二）,tri（三）,etc.,more often for covalent(共价的) compounds than for ionic compounds .
Ans:because the covalent(共价的) compounds have many isomers（同分异构体）but ionic compounds don't have.
可以吗?; 1年前

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令t=x-a,则x=t+a,原极限lim(t->0) (sin(x+a)/sina)^(1/t)=lim(cost+cotasint)^(1/t)=lim((cost)^(1/t))((1+cotatant)(1/t))
令y1=cost^(1/t),lny1=lncost/t,limlny1=lim(lncost)/t-->洛必达=0,y1=1
令y2=(1+cotatant)(1/t)=(1+cotatant)^((1/(cotatant))(cotatant)/t)
limy2=e^(cotatant/t)=e^cota
所以原式=e^cota

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加法结合律 associative law of addition
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a) treat with acid
b) nitrogen oxides(NxOy)

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超一流的化学高手、化学专家请进(0001)

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