How could you tell if a sample of matter is an element

Write a balanced chemical equation for the complete combustion of C3H7BO3, a gasoline additive. The products of combustion are CO2 (g), H2O (g), and B2O3 (s).

Given the equation representing a system at equilibrium: N2 (g) + 3H2 (g) 2NH3 (g) + energyWhich changes occur when the temperature of this system is decreased? (1) The concentration of H2 (g) increases and the concentration of N2 (g) increases.

Compare and contrast the electrical properties of salts metals and acids

A teacher dropped one light ball and one heavy ball simultaneously from the roof of a school building. Both balls struck the ground at the same time. The students correctly concluded from this experiment that falling objects

What does a complete ionic equation look like? A. All substances are written as ionic compounds bonded together. B. All substances are labeled with the oxidation states of the atoms. C. All ionic substances are written as separate ions in solution.

A (n) bond forms when one atom gives up one or more electrons to another atom.

How many neutrons are in silver

C6h6is an example of an

Given the reaction: Mg (s) + 2 AgNO3 (aq) - - > Mg (NO3) 2 (aq) + 2 Ag (s) Which type of reaction is represented? (1) single replacement (3) synthesis (2) double replacement (4) decomposition

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