What is the molar mass in kgmol of carbon tetrachloride CCI4

What is the molar mass (in kg/mol) of carbon tetrachloride (CCI_4)? 0.1598_cm 0.1538.cm 0.2448_cm 0.2986_cm 0.09293_cm 0.08615.cm A gasoline engine absorbs 2200 J of heat and performs 590.0 J of mechanical work in each cycle. What is the efficiency of the engine? 30.55% 21.94% 24.45% 20.57% 28.90% 26.82%

Solution

13 :

Atomic mass of carbon = 12.01 g/mol

and atomic mass of chlorine = 35.45 g/mol

Molecular mass of CCl₄ = (12.01) + (4 x 35.45)

= 12.01 + 141.8

= 153.81 g/mol = 0.15381 kg/mol

14 :

Input Energy = 2200 J

Output Energy = 590 J

Efficiency = (Output Energy / Input Energy) x 100

= (590/2200) x 100

= 26.82