Can use mole rallus dilu illulal illdss luyou determine the masses of substances involved in achemical reaction. using the periodic table, calculate the molar masses of iron oxide (fe2o3)and aluminum oxide (al203). give your answer tofour significant figures. molar mass of fe203x 159.7g/molcompletemolar mass of al o0099900-9g/molretry

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

The last few miles of the marathon are the most difficult for heather, her hair plastered to her head, sweat clinging to her arms, and her legs already feeling as if they had nothing left, just dead weight. after grabbing a cup of ice water, she feels the ice cubes smash against her nose as she gulps some cool refreshment and keeps on running. in these last few miles, the breeze kicks up and she finally feels some coolness against her skin. drips of sweat, once clinging to her forehead, now spill down, and heather feels more pain as the sweat flows into her eyes.which of the following is the most likely reason why the ice struck heather’s nose when she took a drink? a) water can function as a solvent. b) water can store large amounts of heat. c) water can moderate temperatures through evaporative cooling. d) the density of water decreases when it freezes. e) water has a cohesive nature.sweat remained on heather’s forehead and arms because of the a) high salt content of sweat b) cohesive nature of water c) ability of water to moderate heat d) high evaporative cooling effect of water e) ability of water to act as a solvent