Lithium (li) has a charge of +1, and oxygen (o) has a charge of –2. which is the chemical formula? a lio2 b lio c li2o d li2o2

The correct answer is Option c.

Explanation:

Lithium is the third element in the periodic table with oxidation state as +1. It is considered as a metal. Thus, it shows a positive oxidation state.

Oxygen is the 8th element in the periodic table with oxidation state as -2. It is considered as a non-metal. Thus, it shows a negative oxidation state.

When two elements combine to form a compound, their oxidation states are exchanged and it forms the subscript of the other element in a compound. This method of writing a chemical formula is criss-cross method.

The formula for this compound is

Hence, the correct answer is Option c.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.