During an investigation a scientist heated 27 g of mercuric oxide till it decomposed to leave a dry product. the total mass of the product formed was 25 g. does the law of conservation of mass hold true in this case?

Asuspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. if one wishes to follow this process by monitoring the release of 14co2, at which positions in the glucose molecule would the 14c label need to be incorporated?

Which one of the following bonds would you expect to be the most polar? a) b–h b) n–h c) p–h d) al–h e) c–h

What type of context clue you understand the meaning of  quandary?