переводим массу альдегида на кол-во по формуле n=m:M n(CH3CHO)=2.2:44=0.05 моль M(CH3COH)=44 составляю соотношение по ур-ю реакции CH3CHo+Ag2O=CH3COOH+2Ag 12 нахожу кол-во Ag 12 0.05x моль х=0.1 моль нахожу массу серебра m=N*M=0.1*108=10.8 г M(Ag)=108
2)
перевожу массу формальдегида на кол-во по формуле n=m:M M(HCHO)=30 n(HCHO)=2.4:30=0.08 моль 1 HCHO+Ag2O=HCOOH+2Ag 12 0.08x нахожу кол-во серебра х=n(Ag)=0.08*2=0.16 моль рассчитываю массу серебра m(Ag)=M*n=108*0.16=17.28 г с ответом не сходится, но я все проверила, решена правильно!
1. I played football yesterday. --> I have played football recently. --> I was playing football yesterday all day long. 2. I worked with my mother at home yesterday. --> I have already worked with my mum. --> I was working with my mom yesterday. 3. I went to the cinema last week. --> I have gone to the cinema recently. --> While I was going to the cinema, my friend broke his leg. 4. I didn't do my homework. --> I haven't done my homework yet. --> I wasn't doing my homework all day long. 5. I made an apple pie one month ago. --> I have already made an apple pie. --> I was making an apple pie when you came home.
