. Nung 28,4 gam hỗn hợp X gồm Mg, Al, Cu, Ag trong oxi, sau một thời gian thu được 31,6 gam hỗn hợp rắn Y. Hòa tan hết lượng rắn Y trên trong dung dịch HNO3 0,4M đun nóng (vừa đủ) thì thu được 4,48 lít khí NO (đkc) là sản phẩm khử duy nhất của HNO3. Thể tích (lít) dung dịch HNO3 đã dùng là

Các câu hỏi liên quan

PART E. WRITING I. Rewrite the following sentences based on the words in brackets. 1. Wear warm clothes or you will catch a cold. (Unless) ___________________________________________________________________________ 2. Did you take part in the book fair last week? (participate) ___________________________________________________________________________ 3. It’s good for you to do morning exercise every day. (should) ___________________________________________________________________________ 10 4. Did you arrive late for the meeting? (show) ___________________________________________________________________________ 5. She likes playing badminton. She likes swimming, too. (and) ___________________________________________________________________________ II. Complete each second sentence so that it has a similar meaning to the first sentence. 1. How about watching a comedy for relaxation? => Why____________________________________________________________________. 2. How lovely your house is! => What____________________________________________________________________. 3. No one in my class is more intelligent than Van. => Van_____________________________________________________________________. 4. It’s dangerous for you to stay outside late. => Staying__________________________________________________________________. 5. My father is heavier than my brother. => My brother_______________________________________________________________. III. Reorder the words/ phrases to make complete sentences. 1. she / Does / round / an / face? / oval / face / or / have / a ___________________________________________________________________________ 2. clean. / neighbourhood / are / in / streets / my / The ___________________________________________________________________________ 3. volunteers / the / during / Covid-19 / of / offered / have / Hundreds / crisis. / help ___________________________________________________________________________ ___________________________________________________________________________ 4. parents' / The / room / bathroom / my / room. / is / my / and / between ___________________________________________________________________________ 5. Would / tonight? / me / with / like / have / you / to / dinner ___________________________________________________________________________ giúp mik với