Calculate the enthalpy of the reaction h2 (g) f2 (g) → 2hf (g) using bond enthalpies and compare this value to the result obtained by using the standard enthalpies of formation.

Classify the half‑reactions as reduction half‑reactions or oxidation half‑reactions. H2 (g) ⟶2H + (aq) + 2e - 12O2 (g) + 2H + (aq) + 2e-⟶H2O (g) Cd (s) + 2OH - (aq) ⟶Cd (OH) 2 (s) + 2e - 2NiO (OH) (s) + 2H2O (l) + 2e-⟶2Ni (OH) 2 (s) + 2OH - (aq) Fe

If element X has 56 protons, how many electrons does it have? electrons

An aqueous 0.300 M glucose solution is prepared with a total volume of 0.150 L. The molecular weight of glucose is 180.16 mol What mass of glucose (in grams) is needed for the solution?

Whats the relationship between the temperature and the density of a substance

Ow many different elements make up beryllium sulfite, BeSO3?

A sample of gas is at 273°K and 2.00 atm with a volume of 6.00 liters. When the gas is compressed to 3.00 liters and the pressure increases to 3.00 atm, what is the new temperature of the sample?

Which oxygen pachages materials and distributed them throughout the cell

How many atoms in 3 mol zn

Isotopes: are atoms of different elements which have the same mass are atoms of the same element with equal numbers of neutrons are atoms of the same element with different numbers of neutrons are atoms of the same element with equal numbers of

What would happen to the volume of a sample of gas if the temperature was decreased at the same time the pressure was increased?