Problemas
How many grams are there in 7.5times 10^23 molecules of H_(2)SO_(4) 6) How many molecules are there in 122 grams of Cu(NO_(3))_(2) 7) How many grams are there in 9.4times 10^25 molecules of H_(2) 8) How many molecules are there in 230 grams of CoCl_(2) WKSOO1X012 C 2000 Cavalcade Publishing (http://www ,cavalcadepublishing.com)
Roztwór
Raúl
veterano · Tutor durante 9 años
4.4
(353 Votos)
Respuesta
To solve these problems, we need to use the concept of molar mass and Avogadro's number.1. How many grams are there in
molecules of
?First, we need to find the molar mass of
. The molar mass of
is 98.08 g/mol.Next, we need to find the number of moles of
in
molecules. We can use Avogadro's number, which is
molecules/mol.Number of moles =
= 1.25 molesFinally, we can calculate the mass of
by multiplying the number of moles by the molar mass.Mass = 1.25 moles * 98.08 g/mol = 122.6 gramsTherefore, there are 122.6 grams in
molecules of
.2. How many molecules are there in 122 grams of
?First, we need to find the molar mass of
. The molar mass of
is 187.56 g/mol.Next, we need to find the number of moles of
in 122 grams. We can use the formula:Number of moles =
Number of moles =
= 0.65 molesFinally, we can calculate the number of molecules by multiplying the number of moles by Avogadro's number.Number of molecules = 0.65 moles *
molecules/mol =
moleculesTherefore, there are
molecules in 122 grams of
.3. How many grams are there in
molecules of
?First, we need to find the molar mass of
. The molar mass of
is 2.02 g/mol.Next, we need to find the number of moles of
in
molecules. We can use Avogadro's number, which is
molecules/mol.Number of moles =
= 156.1 molesFinally, we can calculate the mass of
by multiplying the number of moles by the molar mass.Mass = 156.1 moles * 2.02 g/mol = 314.8 gramsTherefore, there are 314.8 grams in
molecules of
.4. How many molecules are there in 230 grams of
?First, we need to find the molar mass of
. The molar mass of
is 129.9 g/mol.Next, we need to find the number of moles of
in 230 grams. We can use the formula:Number of moles =
Number of moles =
= 1.77 molesFinally, we can calculate the number of molecules by multiplying the number of moles by Avogadro's number.Number of molecules = 1.77 moles *
molecules/mol =
moleculesTherefore, there are
molecules in 230 grams of
.