Cleaning tarnished silver is an example for which of the following.
chemical change
chemical property
physical change
physical property

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?