1. Which of these is a chemical property? * a) oxygen is a gas at 25 degree Celsius. b) helium is very nonreactive. c) ice melt at 0 degree Celsius. d) sodium is a soft, shiny metal.

An observation that requires measurement is called quantitative observable or qualitative

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.