Both equations are balanced. The different charges do not need to be balanced in this step. Cu2+⇌Cu Zn⇌Zn2+ Step 6:Determine the number of electrons gained or lost and add them to the reaction. There should be no net change in the charge for either half-reaction. ...
and also that techniques have tended to ossify over centuries of practice or to become diverted into such para-rational exercises as alchemy. Some techniques became so complex, often depending upon processes of chemical change that were not understood even when they were widely practiced, that tech...
But capturing wild elephants was the unfortunate standard practice for zoos, private wildlife “collections,” and circuses, up until the 1980s, when a combination of animal rights/conservation awareness and shrinking wild populations led to most countries outlawing the practice. Today’s zoos focus ...
Such a practice was inconceivable two decades ago. But that’s exactly what people were doing. And both financial institutions and homebuilders were part of the fiasco. When I got laid off in the fall of 2010 (in the midst of a fragile recovery), my top concern was the job market; not...
Most Kurds are Sunni Muslims, and among them are many who practice Sufism and other mystical sects. Although several historical dynasties have been led by Kurdish rulers, such as the Ḥasanwayhid dynasty, the ʿAnnazid dynasty, and, most famously, the Ayyubid dynasty, the Kurds have never...
- 例子:"Eating a balanced diet is crucial for maintaining good health and preventing diseases..."5. Argumentative Writing(辩论性写作):- 辩论性写作类似于说服性写作,但它更侧重于提出一个立场,并反驳可能的反对意见。 英语作文主要考哪几种作文 英语作文主要考哪几种作文英语作文考试通常包括以下几种类型:...