The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is a. argon b. xenon c. helium d. krypton the gases used in different types of welding would include a. oxygen and hydrogen b. oxygen, hydrogen, acetylene and nitrogen c. oxygen, acetylene and argon d. oxygen and acetylene the property of a substance to absorb moisture from the air on exposure is called a. osmosis b. deliquescence c. efflorescence d. desiccation in which of the following activities silicon carbide is used? a. making cement and glass b. disinfecting water of ponds c. cutting very hard substances d. making casts for statues the average salinity of sea water is a. 3% b. 3.5% c. 2.5% d. 2%

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

Define dew point. i am writing this part to be able to ask the question

Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, pbutane, alone. to do this, consult a reference and record the partial pressure of the water vapor, pwater, at the temperature you recorded. use the following formula to compute the partial pressure of the butane. pbutane = atmosphere - pwater use the following combined gas law formula and compute the volume that the butane sample will occupy at stp. (hint: convert both temperatures to kelvin.) pbutane x voriginal = pstandard x vfinal troom tstandard use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. grams of butane you used “x” grams of butane ml of butane corrected to stp = 22,400 ml compute the theoretical molar mass of butane based on its formula and the atomic masses on the periodic table. compare your experimental results from #3 to the theoretical value of #4, computing a percent error of your findings using this formula: % error = measured value - accepted value x 100 accepted value use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. need asap