How many moles of copper is produced when 3.80g of iron reacts with excess CuSO4

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

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