When the products of a reaction have less energy than the reactants:

The reaction is exothermic.

The reaction is endothermic.

The reactants lost internal energy.

The change in enthalpy is positive.

Which cell structures are correctly paired with their functions

Is acetylene a homogeneous or heterogeneous mixture

Which of the following statements is true of nuclear fusion? It involves the splitting of an atom's nucleus. It is the process currently used in most nuclear power plants. It is a very endothermic process.

Explain why the quantum number set (3,3,-2, + 1/2) is not possible for an electron in a ground-state atom

An unopened, cold 2.00 L bottle of soda contains 46.0 mL of gas confined at a pressure of 1.30 atm at a temperature of 5.0oC. If the bottle is dropped into a lake and sinks to a depth at which the pressure is 1.52 atm and the temperature is 2.

This element has 3 electrons in its Lewis dot structure and is in the 3p orbital section.

In an exothermic reaction, energy is transferred from a. the reactants to the surroundings. c. one reactant to another. b. the surroundings to the reactants. d. the container to the chemicals.

In any chemical compound the elements are always combined in the same proportion by__. a) charge b) mass c) volume d) density

Which would exhibit characteristics of both a metal and a nonmetal? select one: a. si b. ge c. sb d. po e. all of the above exhibit characteristics of both a metal and a nonmetal?

In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxide were formed (number of moles = mass (g) / molar mass (g/mol)) ? choose the closest answer. a. 0.21 moles b. 0.