Which of these would be best to measure 12.6 ml of liquid ethanol A25 ml beaker
B 25 ml volumetric flask
С 25 mL Erlenmeyer flask
D 25 ml graduated cylinder

fe 55.85 g/mol and h2o 18.02 g/mol.

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.