To prepare a 2 m solution of potassium nitrate (kno3), which quantities must be measured? the mass of the and the volume of the must be measured. copy they both have the same choices. a. solute b. solution c. solvent

To prepare a 2 mol·L⁻¹ solution of KNO₃, you must measure the mass of the A. solute and the volume of the B. solution.

The formula for molar concentration (c) is

c = moles of solute/litres of solution

∴ You measure out a mass of KNO₃ equivalent to two moles (202.20 g), and then you add enough water to make the volume of solution up to 1 L.

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.