Freezing requires

a. the removal of energy.

b. the absorption of energy.

c. no energy change.

A mixture of n2 (g) and h2 (g) reacts in a closed container to form ammonia, nh3 (g). the reaction ceases before either reactant has been totally consumed. at this stage 1.0 mol n2, 1.0 mol h2, and 1.0 mol nh3 are present.

What are different forms of potential energy

Select the correct answer. Which hydrocarbon is an unsaturated hydrocarbon? A. 2-methylheptane B. 3-ethylpentane C. 1-hexene D. cyclopentane

For each equation, write all possible mole ratios. A. 2HgO (s) >2Hg (l) + O2 (g) B. 4NH3 (g) + 6NO (g) >5N2 (g) + 6H2O (l)

An aqueous solution contains 1.00 g/L of a derivative of the detergent laurel alcohol. The osmotic pressure of this solution is 17.8 torr, at 25°C. What is the molar mass (in g/mol) of this detergent?

A chemical reaction is carried out in a closed container. The energy absorbed by the chemical reaction is 50 kJ. What is the energy liberated from the air or the walls of the container? A) 50 kJ B) 75 kJ C) 25 kJ D) 100 kJ

Draw the electron-dot structure for chclo. draw the molecule by placing the atoms on the grid and connecting them with bonds. include all lone pairs of electrons.

At stp 5.6 liters of ch4 which element contains the same number of molecules?

Is a gas that is produced by the ultraviolet radiation in the air in the vicinity of welding operations?

At what the pressure, in atmospheres, that O2, gas at 75°C has a density of 2.00 g/L