In which of the following physical states are the particles in constant motion? 1. Solid
II. Liquid
III. Gas (Vapor)
I and Ill only
O I. II and III
Oil and ill only
Ill only

An observation that requires measurement is called quantitative observable or qualitative

Rays from the sun are not considered matter true or false

In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.