The usual state of oxygen and hydrogen: they are gases at room temperature.
The standard state of oxygen in the enthalpy of formation is usually considered to be gaseous oxygen at 298 K and 1 atm pressure.
CuO ==== One atom of copper. One atom of oxygen. ( assuming the usual 2 oxidation state of copper )
The word "usual" can be both an adjective or a noun, where the usual condition or status is unspecified (the usual).Other nouns for usual are usualness (state of normality) and the rarely-used usuality.
Oxygen is a gas at room temperature and pressure.
The usual state of oxygen and hydrogen: they are gases at room temperature.
The usual oxidation state for oxygen in a compound is -2.
The usual state of oxygen and hydrogen: they are gases at room temperature.
In most compounds oxygen will have an oxidation state of -2. The only exceptions are peroxides (-1), superoxides (-1/2), and compounds in which oxygen bonds with fluorine (+1 or +2).
Oxygen is a gas at room temperature and pressure. It is colorless, odorless, and tasteless in its pure form.
The standard state of oxygen in the enthalpy of formation is usually considered to be gaseous oxygen at 298 K and 1 atm pressure.
This is the usual formula for elemental oxygen in its gaseous state. It could also be called a "diatomic oxygen molecule."
An oxidation state is a number that is assigned to an element in a chemical combination.
The usual oxidation number of oxygen is -2, while the usual oxidation number of hydrogen is +1.
the usual state of both hydrogen and nitrogen are gas.
The valency of oxygen in suboxides can vary, but it is typically less than its usual valency of 2 in oxides. Suboxides contain oxygen atoms with a valency of 1 or less, resulting in a lower overall valency for oxygen in these compounds.
CuO ==== One atom of copper. One atom of oxygen. ( assuming the usual 2 oxidation state of copper )