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a) Use Henry's law to determine the molar solubility of helium at a pressure of 1.8...

a) Use Henry's law to determine the molar solubility of helium at a pressure of 1.8 atm and 25 ∘C. Henry’s law constant for helium gas in water at 25 ∘C is 3.70⋅10−4M/atm.

Express your answer using two significant figures.

b) An aqueous solution containing 36.7 g  of an unknown molecular (non-electrolyte) compound in 160.0 g of water was found to have a freezing point of -1.5 ∘C.

Calculate the molar mass of the unknown compound.

Express your answer using two significant figures.

c) State the kind of intermolecular forces that would occur between the solute and solvent in sodium nitrate (ionic).

ion-dipole
hydrogen bonding
dispersion
dipole-dipole
Science   Chemistry   
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