189.5 g of aluminum has moles of aluminum. (enter just the number for this one.)

Hello!

To find the number of moles in the given amount of aluminum, we need to know the mass of one mole of aluminum, and divide that by the given amount of aluminum.

One mole of aluminum is equal to about 27 grams. With that, we can divide it by the given amount of aluminum.

198.5 grams / 27 grams ≈ 7.35185185

According the number of significant figures, there are about 7.4 moles of aluminum in 189.5 grams of aluminum.

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.