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Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.