El número de Avogadro es 6,022 x 10^23, y es el número de átomos que hay en un mol de dicho elemento. A su vez un mol es la cantidad de un elemento cuya masa en gramos coincide con el peso atómico.

Por tanto, 6,022 x 10^23 átomos del elemento tienen una masa en gramos igual a su peso atómico. Hacemos una regla de tres:

1 gramo -------- 1,5 x 10^22 átomos

x ------------------ 6,022 x 10^23 átomos

=> x = 40,1 gramos por mol del elemento.

De modo que su peso atómico es 40,1. Se trata del calcio.

Saludos.

7 0

3 years ago

How many moles of sulfate ions are in a sample of aluminum sulfate in which the number of formula units is 7.534 × 1023?

valentina_108 [34]

Answer:a unit of grammatical organization next below the sentence in rank and in traditional grammar said to consist of a subject and predicate

Explanation:

7 0

2 years ago

How to balance barium and oxygen yield barium oxide

olga55 [171]

Barium : $Ba^{+2}$ with +2 being the charge
Oxygen : $O^{-2}$ with -2 being the charge

The given equation can be written as:
Ba + O = BaO

Since the sum charges of Barium and Oxygen equals 0, there is no need to add subscripts.

Both Ba and O appear on the left and right side of the equation once, so there is no need to add a coefficient.

Ba + O = BaO is balanced

4 0

2 years ago