What observed rotation is expected when a 1.72 m solution of (r)-2-butanol is mixed with an equal volume of a 0.860 m solution of racemic 2-butanol, and the resulting solution is analyzed in a sample container that is 1 dm long? the specific rotation of (r)-2-butanol is –13.9 degrees ml g–1 dm–1.

pure substance: iron,copper

impure substance: water,charcoal

the answer for sodium is 0.186

the answer for rubidium is 0.251

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.