1. Mg occurs in water of sea to the extent of 1.4 g magnesium/kg of seawater. Calculate volume of seawater (in cubic metres (M3)) would have to be processed to form 1.00 x 105 tons of mg? . Given that the density =1.025 g/mL for seawater.
2. A scientists places 4.00 moles of Argon, Ar (g) and 2.00 moles of Helium, He (g) into a flask at the temperature of 298 Kelvin and measures the pressure to be 3.00 atm. calculate the pressure due to Helium gas?