Which of the following has almost no mass?
select one:
a. proton
b. neutron
c. electron

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

Which formula can be used to calculate the molar mass of hydrogen peroxide

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.