bbgkay78
contestada

A sample is prepared by adding 10 grams of oxygen gas to 10 grams of nitrogen gas.No energy change is observed.which best describes sample
A )a mixture that is 50% oxygen by Mass
B) a compound that is 50% oxygen by Mass
C) a mixture in which 50% of the atoms are oxygen
D) a compound in which 50% of the atoms are oxygen