1) By 8 o'clock yesterday I had done my homewrok . 2) On my way home I remembered thet I had left my roport at home . 3) When I came home , my mother told me thet she had received the letter from grandmother. 4) Suddenly he remembered thet he hadn't rung her up in the morning. 5) I knew thet my friend hadn't come home yet . 6) The teachar understood thet Lena hand't done her homework. 7) Nick returned from the park at 5 o'clock 8)Nick had returned from the park by 5 o'clock . 9) Ann finished my homework at seven o'clock . 10) Ann had finished my homework by seven o'clock 11) When they entered the hall, the performance had already begun. 12)She thought that Gert and Lanny had to quarreled 13) During the holidays my griend visited the village where he had lived in his childhood . 14) Last year all friends spent their holidays at the seaaside .
1) By 8 o'clock yesterday I had done my homewrok . 2) On my way home I remembered thet I had left my roport at home . 3) When I came home , my mother told me thet she had received the letter from grandmother. 4) Suddenly he remembered thet he hadn't rung her up in the morning. 5) I knew thet my friend hadn't come home yet . 6) The teachar understood thet Lena hand't done her homework. 7) Nick returned from the park at 5 o'clock 8)Nick had returned from the park by 5 o'clock . 9) Ann finished my homework at seven o'clock . 10) Ann had finished my homework by seven o'clock 11) When they entered the hall, the performance had already begun. 12)She thought that Gert and Lanny had to quarreled 13) During the holidays my griend visited the village where he had lived in his childhood . 14) Last year all friends spent their holidays at the seaaside .
n=CV
конц-и нормальные, поэтому С1V1=C2V2
m=0,025 ∙ 0,1 ∙ 56 = 0,14г