A steel alloy is 995 ppm tungsten (W) by weight in iron. What is the tungsten proportion in mol%. (2 marks) O a. 0.0002992 O b.0.0995 O c 0.0299 O d. 0.000299 If gasoline has a density of 0.87 g/mL. 18 kg will fit in a 5.0 US gal jug. True O False For aluminum foil 0.0079 inches thick, what is the area density, in mass'm2, if the volume density of Al is 2.70 g/mL? (2marks) 2.5.42 kg/m2 Ob.213 g/m2 Oc765 g/m2 d. 0.542 kg/m2