CAN SOMEONE PLEASE HELP ME THIS IS DUE TOMORROW AND I DON"T KNOW WHAT TO DO HERE

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?

There are main groups in the modern periodic table of elements

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax