Cho 16 gam sắt III oxit tác dụng với 146 gam dung dịch axit clohiđric 20% , Thu được dung dịch A. a. Xác định khối lượng chất tan có trong A ? b. Tính C% của chất trong A ?

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

How does the motion of particles in a gas change as the gas cools