If heat or energy is absorbed during a chemical reaction, then the reaction is considered: endothermic

synthesis

combustion

exothermic

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

Which change in temperature is the smallest? a change of 1 thomson degree a change of 1 kelvin degree a change of 1 fahrenheit degree a change of 1 celsius degree

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %