1- La masa molar es el número de moles de una sustancia que tendría una masa de 1 gramo. (2 Points)
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2- La suma del porcentaje por masa de cada elemento de un compuesto debe ser igual al 100%
(2 points)
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3- Un hidrato es un compuesto que reacciona violentamente en presencia de agua.
(2 points)
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4- Anhidro es un término que se usa para describir un compuesto que no posee moléculas de
agua enlazadas a sus átomos
(2 points)

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.

hcl + naoh → h2o + nacl

explanation:

hcl + naoh → h2o + nacl   is the reaction that is correctly balanced.

however, pcl3 + h2 → ph3 +3hcl, 2ca+ 3cl2 → cacl3, and c5h12 + 5o2 → 5co2 + 6h2o are not correctly balanced.