In a torricelli barometer, a pressure of one atmosphere supports a 760 mm column of mercury. if the original tube containing the mercury is replaced with a tube having twice the diameter of the original, the height of the mercury column at one atmosphere pressure is mm. a) 380 b) 760 c) 1.52 x 103 d) 4.78 x 103 e) 121

Don’t know. don’t care.look it up on google

Melting increases as mass increases. since alkanes are not branched molecular structures, the one with the heavier mass will have higher melting point.  octane's mp > butane's mp

Most elements have more than one naturally occurring isotope. as you learned previously, the atoms of those isotopes have the same atomic number (number of protons), making them belong to the same element, but they have different mass numbers (total number of protons and neutrons) giving them different atomic masses. so which mass is put on the periodic table for each element? is it the most common isotope’s mass? the heaviest mass? this activity will answer that question.

Hope you figure it out: )