Vì KL + HNO3 không có khí thoát ra => sản phẩm khử là NH4NO3 TQ : 2M(NO3)n —> M2On + 2nNO2 + 0,5nO2 NH4NO3 —> N2O + 2H2O nO(X) = 0,61364m/16 (mol) nNO3 = ne tđ + nNH4NO3 = 1/3nO(X) = 0,61364m/48 (mol) Ta có : ne tđ = 8nNH4NO3 => ne tđ = 0,61364m/54 = nNO2 = 4nO2 ; nNH4NO3 = 0,61364m/432 => nO2 = 0,61364m/216 (mol) Bảo […]
According to “companion” Ming-Chi Kuo, who specializes in accurate predictions about Apple’s product lines, the iPhone 14 series launched next year will be equipped with a 48MP camera. If this information is authentic, that means that Apple will officially “join” the high-resolution camera smartphone segment until 2022. Camera is the main marketing element that Apple […]
Huawei recently introduced a limited edition FreeBuds Lipstick wireless headset in the Vietnamese market. This is an extremely unique headset model with the design of a lipstick, promising to be a gift for women’s associations on the occasion of the end of the year. According to Huawei, the design of FreeBuds Lipstick is the contribution […]
Question 45: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks. The future of the African elephant depends on man. No (1)….. can human beings and wild animals live in harmony throughout […]
UNL study focusing on precision ranching technology NTV ================ Source link Link Hoc va de thi 2021
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Question: Choose the underlined part that needs correction: The prisoner is thought (A) to escape (B) by climbing (C) over the wall (D). Reference explanation: Correct answer: GET Active: People/They/… + say/said/think/… + (that) + S + V + sb/sth => Passive: + Method 1: It + passive + that…. + Method 2: S + […]
In addition to the new folding screen Huawei P50 Pocket introduced today, Huawei also launched a new ultrabook laptop model called MateBook X Pro 2022. The new version has been upgraded in appearance with a thinner and lighter design, accompanied by it’s a screen that also has thinner bezels, better quality. MateBook X Pro 2022 […]
Câu hỏi: I looked for my bag after I ______ lunch. Lời giải tham khảo: Đáp án đúng: B Cấu trúc: Quá khứ đơn + after + Quá khứ hoàn thành Cách dùng: để diễn tả sự việc đã xảy ra sau khi một sự việc khác kết thúc trong quá khứ. Dịch câu: Tôi […]
Question: With her ______and experience, she seemed to be suited to the job. Reference explanation: Correct answer: GET Knowledge: Vocabulary, type words With her qualifications and experience, she seemed to be suited to the job. Qualifications: qualifications, conditions, standards, professional qualifications (to hold a position…); (plural) certificate of ability With her qualifications and experience, she […]