What volume of a 1.5 M KOH solution is needed to provide 3.0 moles of KOH? 3.0 L
2.0 L
4.5 L
0.50 L
0.22 L

Please explain!

Which fact represents evidence for the big bang theory?

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j

What is the value of the standard enthalpy of formation of an element in its most stable form?