27. What substance is a liquid at -200 °C? carbon
phosphorus
xenon
arsenic
nitrogen

How many cells are our body made of ? ♡

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

Hurry where is the majority of earth's water found? o glaciers o oceans ground o rivers and lakes