Which best explains why an iceberg floats?
Water expands and becomes denser when it freezes.
Water contracts and becomes denser when it freezes.
Water expands and becomes less dense when it freezes.
o Water contracts and becomes less dense when it freezes.

List four observations that indicate that a chemical reaction may be taking place

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water

Ill give brainiestif one neutron initiates a fission event that produces two neutrons in the products, how many new reactions can now be initiated? if each of the neutrons produced in the first fission event then initiates a fission event that produces one neutron in the products, how many new reactions can now be initiated by each neutron? how many neutrons in total were produced by the two fission events described?