Ответ:
Mr(Al(OH)₃) = 27 + 16·3+1·3 = 78
Mr (Na3Po4)=23*3+31+16*4=164
Mr(Cr(NO3)3)=52+(14+48)*3=238
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Ответ:
Mr(Al(OH)₃) = 27 + 16·3+1·3 = 78
Mr (Na3Po4)=23*3+31+16*4=164
Mr(Cr(NO3)3)=52+(14+48)*3=238