Answer:
Would it be<em><u> 7.69 seconds</u></em>?
Explanation:
The molarity of Ba(OH)₂ barium hydroxide solution is 0.41 M.
<h3>What is
Molarity ?</h3>
Molarity (M) is the amount of a substance in a certain volume of solution.
Molarity is defined as the moles of a solute per liters of a solution.
Molarity is also known as the molar concentration of a solution
It can be written as
The given data is
Mass of Ba(OH)₂ = 3 g
Volume of solution = 42.8 ml = 0.0428 l
Molecular weight of Ba(OH)₂ = 171 g
Moles of Ba(OH)₂ = 3/ 171 = 0.0175 moles
Molarity = 0.0175/0.0428
=0.41 M
Therefore the molarity of Ba(OH)₂ is 0.41 M.
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Answer:
a. 75 mol O2
Explanation:
1 mol C2H6O -> 3 mol O2
25 mol C2H6O -> x
x= (25 mol C2H6O * 3 mol O2)/ 1 mol C2H6O
x= 75 mol O2
Correct answer: C) dispersion forces
Dispersion forces are the intermolecular forces of attraction present in all types of molecules. These are the weakest forces of attraction in which atoms of the molecule align in such a way that weak forces of attraction develop between electron cloud of one atom and the positively charged nucleus of the adjacent atom. This is referred to as induced dipole-induced dipole type of interaction. Therefore in dispersion forces temporary dipoles are developed due to constant motion of electrons that results in asymmetric electron distribution around the nucleus in an atom.