Thủy phân m gam mantozo sau một thời gian thu được dung dịch X khi cho dung dịch X tác dụng gần hết với dung dịch AgNO3 trong NH3 thì thu được tối đa 194,4 gam Ag biết hiệu suất quá trình thủy phân là 80% giá trị gần nhất của m là

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

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