Densities of solutions of sodium hydroxide and water at 20 °c are given by the equation: p 1.003 +1.06wao where p is the density of the solution in g/cm (grams of solution per cm3 of solution) and wnaoh is the weight fraction of sodium hydroxide. the equation is valid for sodium hydroxide weight fractions less than or equal to 0.5. 100 liters of a solution that has a sodium hydroxide weight fraction of 0.5 is to be diluted with pure water until the weight fraction of naoh is equal to 0.2. what volume of water must be added and what will be the volume of the final mixture? express both volumes in liters. naoh

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

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d

How many valence electrons are in atom of radon?