Làm ơn, 40 điểm của em đó, các anh chị chỉ cần giải giúp em câu d là được rồi ạ, còn lại em làm được rồi. Em cần trước 9h tối nay ạ. Câu 1: Hoà ta hoàn toàn 23,4 gam kali trong nước thu được V lít khí hiđro và 280 gam dung dịch bazơ a. Tính V? b.Tính khối lượng bazơ thu được? c. Tính nồng độ % của dung dịch bazơ d. Nếu dùng thể tích khí hiđro ở trên khử được 16 gam oxit của kim loại R hoá trị III. Hãy xác định R

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