Answer:
.
Explanation:
Look up the relative atomic mass of 
, 
, and 
on a modern periodic table:
Calculate the molecular mass of 
and 
:
;
.
Given the mass 
of and produced, calculate the number of moles of molecules that were produced:
;
.
Calculate the number of moles of atoms and atoms in these and molecules.
- Each molecule contains one atom. Therefore, that
of 
contains 
of 
atoms. - Each molecule contains two atoms. Therefore, that of
contains 
of 
atoms.
The combustion reaction here include two reactants: the hydrocarbon and 
.
As the name suggests, hydrocarbons contain only atoms and atoms. On the other hand, contains only atoms.
Therefore, all the and atoms in those and molecules are from the unknown hydrocarbon. (With a similar logic, all the atoms in those combustion products are from .)
In other words, that 
of this unknown hydrocarbon molecules contains:
Hence, each of these hydrocarbon molecules would contain 
carbon atoms and 
hydrogen atoms.
The molecular formula of this hydrocarbon would be 
.
Ti + 2 Cl2 → TiCl4
(3.00 g Ti) / (47.867 g Ti/mol) = 0.062674 mol Ti
(6.00 g Cl2) / (70.9064 g Cl2/mol) = 0.084619 mol Cl2
0.084619 mole of Cl2 would react completely with 0.084619 x (1/2) = 0.0423095 mole of Ti, but there is more Ti present than that, so Ti is in excess and Cl2 is the limiting reactant.
(0.084619 mol Cl2) x (1 mol TiCl4 / 2 mol Cl2) x (189.679 g TiCl4/mol) = 8.025 g TiCl4 in theory
(7.7 g) / (8.025 g) = 0.96 = 96% yield TiCl4
The answer to your question is A. Wrought iron because amongst its other properties, wrought iron becomes soft at red heat, and can be easily be forged and forge welded.
.
.
.
of