What is enthalpy?

A. Enthalpy is the heat involved in a reaction.

B. Enthalpy is the temperature of a reaction.

C. Enthalpy is the mass involved in a reaction.

D. Enthalpy is the kinetic energy of a system.

Which of these is an indication that a chemical reaction has occurred? A. melting of a substance B. boiling of a substance C. formation of a precipitate D. freezing of a substance

Which is responsible fot the high thermal energy required to melt ice? A. covalent bonds B. dispersion forces C. hydrogen bonding D. ionic attractions

A neutral Adam possesses an atomic number of 15 and atomic mass of 31 three electrons are gained what is the result of a conversion

What are the forces acting on the components of the apparatus that influence its motion?

Does sound travel best through solids, liquids, or gases?

g Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. Suppose 2.71 g of ethane is mixed with 3.8 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction.

How many molecules of atp are produced in aerobic versus anaerobic cellular respiration

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).

Which of the following polymers is used in plastic bottles and plastic containers? Select one: a. LDPE b. PVC c. Polystyrene d. HDPE e. Polypropylene

Which of the following statement is not true? A) The sun is involved in producing tides B) There can be two high tides in one location during a single day C) Only the oceans have tides D) If there is a high tide, there will be a low tide