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Giúp em câu a thôi cũng được mng ơi, nửa câu a thôi cũng đc ạ Đốt cháy hoàn toàn một hidrocacbon X ở thể khí thu được 0,14 mol CO2 và 1,89g H2O a) Tìm CTPT & CTCT của X, biết X trùng hợp tạo thành cao su buna b) Viết phương trình phản ứng của X với HBr theo tỉ lệ mol 1:1 và gọi tên sản phẩm
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