Some headache medicines are fine powders that are dissolved in water and then ingested. these medicines claim they work faster than other medicines. could this be true? why or why not?

a. false: chemicals react at the same rate in the body, as determined by body temperature.

b. false: these would actually slow the reaction because it would become less concentrated

c. true: a solid will react quicker in the liquid environment of the stomach than a gas or liquid

d. true: a fine powder dissolves quickly, this solution can more quickly be absorbed and begin working

If the element whose electric configuration ends in the d sublevel, the element is calssified as? a.inner transition b.noble gases c.representative d. transition

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

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