Can melting point use as purity of a substance explain

hi

Explanation:

melting and boiling point determination the physical properties of a substance can be used to establish its purity however the presence of impurities will cause lower melting point as well as a change in boiling point

answer:

moles of ethanol = 0.04 mol

moles of water = 1 - 0.04 = 0.96 mol

mass of water = 0.96 * 18 = 17.3g

mass of ethanol = 0.04 * 46 = 1.84g

mass of solution = 17.3 + 1.84 = 19.1g

let density of solution be 1g/ml

volume of solution = mass/density = 19.1/1 = 19.1ml = 0.0191l

molarity = 0.04/0.0191 = 2.1m

explanation:

answer:

4 none of these

explanation:

because h is