It is D: a spinning cloud of dust...
Answer:
2.67 M
Explanation:
Molarity, which is the molar concentration of a substance, can be calculated using the formula;
M = n/V
Where;
M = molarity (M)
n = number of moles (mol)
V = volume (Litres)
Based on the provided information in this question, mass of lithium sulfate (Li2SO4) = 734g, volume = 2.5L
Using mole = mass/molar mass
Molar mass of Li2SO4 = 7(2) + 32 + 16(4)
= 14 + 32 + 64
= 110g/mol
Mole = 734/110
Mole (n) = 6.67moles
Molarity = n/V
Molarity = 6.67/2.5
Molarity = 2.668
Molarity of Li2SO4 in the solution is 2.67 M
The two resonating structures of Carbon Monoxide are shown below.
The movement of electrons are shown by arrow.
Structure A: In structure a A the formal charges of Carbon and Oxygen are zero. As
Formal Charge is calculated as,
= # of valence electron - electrons in lone pairs + 1/2 bonding electrons electrons
For C: = 4 - 2 + 4/2
= 4- 4
=
0For O: = 6 - 4 + 4/2
= 6- 6
=
0Structure B:
Formal Charge on C: = 4 - 2 + 6/2
= 4- 5
=
-1Formal Charge on O: = 6 - 2 + 6/2
= 6 - 5
=
+1
Answer:B. A liquid changes to a solid.
Explanation: