Liquid nitrogen has different properties from gaseous nitrogen. is it a chemical change when liquid nitrogen warms to gaseous nitrogen?

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures