Sagot :
Answer:
Hello!
How many atoms of cobalt are in a 0.39 mole sample of Co(C2H3O2)3?
* Knowing that by Avogadro's Law for each mole of a substance we have 6.022 * 10²³ molecules.
1 mol ------------------ 6.022*10²³ molecules
0.39 mol --------------------------- y molecules
\dfrac{1}{0.39} = \dfrac{6.022*10^{23}}{y}
0.39
1
=
y
6.022∗10
23
multiply the means by the extremes
1*y = 0.39*6.022*10^{23}1∗y=0.39∗6.022∗10
23
\boxed{y = 2.34858*10^{23}\:molecules\:of\:Co(C_2H_3O_2)_3}
y=2.34858∗10
23
moleculesofCo(C
2
H
3
O
2
)
3
* We know that an molecule is formed by one cobalt atom, so we have:
1 molecule of Co(C2H3O2)3 --------------------------------- 1 atom of Co
2.34858*10²³ molecules of Co(C2H3O2)3 -------------- y atom of Co
\dfrac{1}{2.34858*10^{23}} = \dfrac{1}{y}
2.34858∗10
23
1
=
y
1
multiply the means by the extremes
1*y = 1*2.34858*10^{23}1∗y=1∗2.34858∗10
23
y = 2.34858*10^{23}y=2.34858∗10 Hello!
How many atoms of cobalt are in a 0.39 mole sample of Co(C2H3O2)3?
* Knowing that by Avogadro's Law for each mole of a substance we have 6.022 * 10²³ molecules.
1 mol ------------------ 6.022*10²³ molecules
0.39 mol --------------------------- y molecules
\dfrac{1}{0.39} = \dfrac{6.022*10^{23}}{y}
0.39
1
=
y
6.022∗10
23
multiply the means by the extremes
1*y = 0.39*6.022*10^{23}1∗y=0.39∗6.022∗10
23
\boxed{y = 2.34858*10^{23}\:molecules\:of\:Co(C_2H_3O_2)_3}
y=2.34858∗10
23
moleculesofCo(C
2
H
3
O
2
)
3
* We know that an molecule is formed by one cobalt atom, so we have:
1 molecule of Co(C2H3O2)3 --------------------------------- 1 atom of Co
2.34858*10²³ molecules of Co(C2H3O2)3 -------------- y atom of Co
\dfrac{1}{2.34858*10^{23}} = \dfrac{1}{y}
2.34858∗10
23
1
=
y
1
multiply the means by the extremes
1*y = 1*2.34858*10^{23}1∗y=1∗2.34858∗10
23
y = 2.34858*10^{23}y=2.34858∗10
23
\boxed{\boxed{y \approx 2.35*10^{23}\:Atoms\:of\:Cobalt}}\end{array}}\qquad\checkmark
Answer:
Approximately 2.35*10²³ atoms of cobalt123
23
\boxed{\boxed{y \approx 2.35*10^{23}\:Atoms\:of\:Cobalt}}\end{array}}\qquad\checkmark
Answer:
Approximately 2.35*10²³ atoms of cobalt