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haovan188
2 năm trước
Dẫn khí H2 dư đi qua 25.6 gam hh X gồm Fe3O4, MgO, CuO( nung nóng) cho đến khi pứ xảy ra hoàn toàn. Sau pứ thu được 20.8g chất rắn. Hỏi nếu hòa tan hết X bằng dung dịch H2SO4 thì cần bao nhiêu gam dd H2SO4 20% Làm theo cách lớp 9 nha
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Giải giúp mình với !!! Mình cảm ơn nhiều, nếu chịu khó thì giải thích giúp mình với ạ !!!! For many people the language of Internet is English. ‘World, Wide, Web: Three English words’ was the name of an article by Michael Specter in the New York Times a few year ago. The article went on to say: ‘If you want to take full advantage of the Internet, there is only one real way do it: learn English’. In general, it is not difficult to learn to use Internet services. But although Internet services are rather easy to use, you will have considerable difficulties if you are not familiar with English. In fact, knowledge of English is one of the most important aspects that help you use the Internet. Learning to use a new Internet service may take a few hours, a few days, or some weeks, but it takes years to learn a language so that you can learn it fluently and confidently. Of course, when you know some English, you can learn more just by using it on the Internet. But at least your English should be good enough to understand commonly used words and to know what to do on the Internet.

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