Ở khoảng cách 40 dặm so với mặt đất, nhiệt độ không khí là 250K và áp suất chỉ là 0,2 mmHg. Khối lượng riêng không khí ở độ cao này là bao nhiêu (gam/lít)? Giả sử là khối lượng phân tử của không khí là 28,96 g/mol

What is limiting reactant? with examples

According to the diagram; a) identify the anode of the cell and write the half-reaction that occurs there b) write the overall equation for the reaction that occurs as the cell operates c) calculate the value of the standard cell potential ,e cell. d)write the shorthand notation of the cell above e)indicate the flow of the electrons on the diagram

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.