Относительно молекулярна маса речовини складу caeo4 становыть 136

Mr (caeo4)=40+103+16×4=207 

1. i usually travel four times a year. 2. i go away for three-four weeks. 3. i prefer to stay in my home country. 4. i like to travel by bus. 5. i prefer to travel with my friends. 6. i always prepare my holidays in advance by reading guidebooks and studying maps. 7. it depends on the season of year, but more frequently i prefer the mountains. 8. i take my large rucksack with me. 9. usually i don't take a lot of things with me. 10. actually, i am an active holiday-maker. i don't like to be a couch potato. на 100 % верно. могу даже учителю твоему объяснить, если будет возражать. отметь 5 звездочками, . я проходил грамматику по murphy, advanced. =)) заранее.

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