Please help this is my chemistry work

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?

Turbo the snail moves across the ground at a pace of 12 feet per day. if the garden is 48 feet away, how many days will it take for the snail to get there?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?