Air flows over a solids lab of frozen carbon dioxide (dry ice) with an exposed cross-sectional surface area of 0.001m2. the carbon dioxide sublimes into the 2m/s flowing stream at a total release rate of 2.29x10−4mol/s. the air is at 293k and 1.013x105pa pressure. at that temperature, the diffusivity of carbon dioxide in air is 1.5x10−5 m2/s and the kinematic viscosity of the air is 1.55x10−5 m2/s. determine the value of the mass-transfer coefficient of co2 subliming into the flowing air under the conditions of the experiment.
show all step and how to calculate pressure.

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Which statement is true regarding the diagram of circle p? the sum of y and z must be 2x. the sum of y and z must be x. the difference of z and y must be 2x. the difference of z and y must be x