An unknown, clear liquid is given to you in a beaker. you transfer some of the liquid from the beaker to a clean, empty test tube, and begin to heat it. soon, you observe a vapour leaving the top of the test tube. with further analysis you discover that the vapour is water vapour. eventually, all that's left are a few crystals stuck to the sides of the test tube. was the original liquid an element, a compound, or a mixture? explain

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?