Which field of science studies the composition and structure of matter

What type of solution is formed if 10 g of kclo3 are dissolved in 100g of water at 30

Is 343 in the sequence -5, -2, 1, 4, 7

•what conclusions can you make about the relationship between the volume of a gas and its temperature? • what conclusions can you make about the relationship between the volume of a gas and its pressure? • what possible variables have you not accounted for? as you did the procedures, is it possible that the atmospheric pressure may have changed? if it did change over the course of your experiment, then how would your results have been affected?