A company uses chlorine to produce titanium chloride from titanium dioxide. What is the relative formula mass (Mr) of titanium dioxide, TiO2?
Relative atomic masses (Ar): O = 16 Ti = 48 *

80 g/mol

Explanation:

The Relative formular mass is the sum of the relative atomic masses of the elements present in the molecule.

TiO2;

There is one Ti atom and 2 O atom. Their atomic masses is given as;

TiO2 = 48 + 2(16) = 48  + 32 = 80 g/mol

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"