How many moles of oxygen does it take to react to 15 moles of iron?

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

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

Reactions in cells take place at about a. 40°c b. 0° c. 100°c d. 60°c