Which substance can not be broken down by a chemical change?
(1) methane (3) tungsten
(2) propanal (4) water

How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103

Draw the lewis dot structure for each of the following polyatomic ions

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process