Carbon Dioxide is used in celular respiration. All other choices are waste products
<u>Chemical</u>. The copper atoms form new chemical bonds with atoms in the air.
Surface tension
..viscosity is the thickness of a liquid, doesn't fit here...condensation and evaporation are processes not properties.
As the concrete has cement, gravel, crushed rocks, sand, and water of different physical state and can be separated by physical methods hence it should be called as a mixture.
As the components have significant physical boundaries which clearly identify their presence, the mixture is heterogeneous and not homogeneous.
Thus this is a concrete is a heterogeneous mixture of cement, gravel, crushed rocks, sand, and water
<span>ability to dissolve ionic substances is the answer</span>
