The low-resolution mass spectrum of an unknown analgesic x had a molecular ion of 151. possible molecular formulas include c7h5no3, c8h9no2, and c10h17n. high-resolution mass spectrometry gave an exact mass of 151.1370. what is the molecular formula of x?

Word equation for k+ h2o yield koh + h2

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth