How much heat, in Joules, is needed to raise the temperature of 257 g of ethanol by 49.1°C? (cethanol = 2.4 J/g°C) A) 30284.9 J
B) 12618.7 J
C) 616.8 J
D) 5257.8 J

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change