Which free elements are found in the earths crust

Is flubbed an example of matter?

Which change is most likely to occur when a molecule of H2 and a molecule of I2 collide with proper orientation and sufficient energy? 1. a chemical change, because a compound is formed 2. a chemical change, because an element is formed 3.

When are the products of an equilibrium reaction favored? A. When the reaction is endothermic. B. When the equilibrium constant is large. C. When the macroscopic properties are constant. D. When the activation energy of the forward reaction is high.

Top-level predators such as wolves and lions are categorized in the highest trophic levels in their food webs Where does the energy they consume originate a the sun b producers c their prey d primary consumer

Which curve represents the faster reaction, and which the slower?

Describe three physical changes that occur in nature.

Name the two sub-atomic particles in the nucleus of an aluminium atom.

Identify the true statement. Choose one: A. The expansion of ice sheets at the end of the Pleistocene caused glacial rebound in northern Canada. B. Regions covered by glacial ice are termed periglacial environments. C.

What is the concentration when 0.065 moles of NaNO3 are dissolved in enough water to make 150.0 mL of solution?

What are the reactants and products of cellular respiration and photosynthesis?