Saturday, July 6, 2019

MOLE : ANSWER & EXPLANATION

How many atoms of each element of AgNO3 are in 0.15 mol of AgNO3?


Answer:

9.0x1022Ag atoms
9.0x1022N atoms
2.7x1023O atoms

SOURCE :https://socratic.org/questions/how-many-atoms-of-each-element-of-agno-3-are-in-0-15-mol-of-agno-3


Explanation:

  1. From 0.15mol of AgNO3, we can find the moles of each element by counting how many of each element is present in the entire compound. In AgNO3, there's 1 Ag, 1 N and 3 O.
  2. Then, we convert from moles of each element to the number of atoms using Avogadro's number 6.02x1023.
I went ahead and set up the two steps above in 1 line for each element:
Ag atoms=0.15mol AgNO31mol Ag1mol AgNO36.02x1023Ag atoms1mol Ag=9.0x1022Ag atoms
N atoms=0.15mol AgNO31mol N1mol AgNO36.02x1023N atoms1mol N=9.0x1022N atoms
O atoms=0.15mol AgNO33mol O1mol AgNO36.02x1023O atoms1mol O
=
2.7x1023O atoms

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