Answer:
8.22E⁰ kg
Explanation:
Given data:
Mass of glucose = ?
Number of molecules = 2.75×10²⁵ molecules
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
For 2.75×10²⁵ molecules of glucose:
One mole of glucose = 180 g
180 g/6.022 × 10²³ molecules× 2.75×10²⁵ molecules
82.2 × 10² g
8220 g
8.22 Kg
8.22E⁰ kg
The number of sulfate ions that are in 100 ml of a solution of 0.0020 M Fe2(SO4)3 is 6 x10 ^-4 moles
calculation
find the moles of Fe2(SO4)3 that dissociated
moles = molarity x volume in liters
volume in liters = 100/1000 = 0.1 liters
molarity =0.002 M
moles = 0.002 x0.1 =2 x10 ^-4 moles
write the equation for dissociation
Fe2(SO4)3 = 2fe^3+ + 3 SO4^2-
by use of mole ratio between Fe2(SO4)3 to SO4^2- which is 1:3 therefore the moles of SO4^2- is
= 0.0002 x3 = 6 x10 ^-4 moles
Answer:
0.0159m
Explanation:
9 M
Explanation:
Lead(II) chloride,
PbCl
2
, is an insoluble ionic compound, which means that it does not dissociate completely in lead(II) cations and chloride anions when placed in aqueous solution.
Instead of dissociating completely, an equilibrium rection governed by the solubility product constant,
K
sp
, will be established between the solid lead(II) chloride and the dissolved ions.
PbCl
2(s]
⇌
Pb
2
+
(aq]
+
2
Cl
−
(aq]
Now, the molar solubility of the compound,
s
, represents the number of moles of lead(II) chloride that will dissolve in aqueous solution at a particular temperature.
Notice that every mole of lead(II) chloride will produce
1
mole of lead(II) cations and
2
moles of chloride anions. Use an ICE table to find the molar solubility of the solid
PbCl
2(s]
⇌
Pb
2
+
(aq]
+
2
Cl
−
(aq]
I
−
0
0
C
x
−
(+s)
(
+
2
s
)
E
x
−
s
2
s
By definition, the solubility product constant will be equal to
K
sp
=
[
Pb
2
+
]
⋅
[
Cl
−
]
2
K
sp
=
s
⋅
(
2
s
)
2
=
s
3
This means that the molar solubility of lead(II) chloride will be
4
s
3
=
1.6
⋅
10
−
5
⇒
s
= √
1.6
4
⋅
10
−
5 =
0.0159 M
Answer:
I believe your answer would be...
The number of animals greatly exceeded the carrying capacity, destroying the food sources and causing the population to decline.
Explanation:
Using the process of elimination its the only one that makes sense.
I am not the best at this, but im pretty sure its below cloud