What one factor identifies an atom as a specific element?

When the heat of reaction (H=ve), the reaction is Endothermic reaction True False

How many coulombs of electrical charge are transferred from pb to pbo2?

High-flying aircraft release NO Into the stratosphere, which catalyzes this process. When O3 and NO concentrations are 5 x 10^12 molecule/cm 3 and 2 x 10^9 molecule/cm3, respectively, what is the rate of O3 depletion?

What would you see when an iron rod is placed into a solution containing aqueous copper (ll) ions

Nh4i (aq) + koh (aq) → express your answer as a chemical equation. identify all of the phases in your answer.

Which element easily loses one electron to form a positive ion? A. Magnesium (Mg) B. Lithium (Li) C. Nitrogen (N) D. Fluorine (F)

What is an indication a chemical reaction has occurred? A.) Formation of gas B.) Boiling of a substance C.) Melting of a substance D.) Freezing of a substance

A saline solution contains 1.6 % NaCl by mass. How much NaCl is present in 57.2 g of this solution?

During a laboratory experiment you discover that an enzyme-catalyzed reaction has a delta G of - 20 kcal/mol. If you double the amount of enzyme in the reaction, what will be the delta G for the new reaction

What is the molarity of a hydrochloric acid solution prepared by diluting 200.0 ml of 0.500m hcl to a total volume of 1.00 l?