3. A chemical symbol designates an element that belongs to the periodic table. A chemical formula combines two or more symbols and it represents a chemical compound.
4.A mixture is made of two or more substances—elements, compounds, or both—that are together in the same place but are not chemically combined. Example: vegetable soup!Mixtures differ from compounds intwo ways: Each substance in a mixturekeeps its individual properties.
5.filtration, evaporation, distillation, chromatography
Weathering, Erosion, deposition, acid rain, precipitation
Explanation:
Formula for potential energy is V=mgh, where m is mass in KG, g is earth acceleration (10 m/s^2), and h its height in meters. We know mass, acceleration is constant and also known, we know height also. Lets substitute
V=75*10*300=225000[J]=225[kJ] - its the answer
