Achemical change is a change in the properties of matter
that does not change the identity of the substance
where no new chemical bonds are formed
that only changes the size
where chemical bonds are broken and new bonds are formed

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n