An unknown material has a mass of 2.5 g and a volume of 4 cm3. What is the density of the material? Round to the nearest tenth.
A.
1.6 g/cm3
B.
0.6 g/cm3
C.
0.7 g/cm3
D.
1.3 g/cm3

chemical properties are the characteristic of matter which can only be observed by changing the chemical identity of a sample like flammability reactivity and toxicity.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.