What is the difference between covalent bonds and ionic bonds? a. covalent bonds involve the sharing of pairs of electrons between atoms; ionic bonds involve the sharing of single electrons between atoms. b. covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between atoms. c. covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the sharing of protons between atoms. d. covalent bonds involve the transfer of electrons between atoms; ionic bonds involve the sharing of electrons between atoms.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

You have a sample of a gas that occupies a volume of 17ml at -111 degrees celsius. what volume does the sample occupy at 88 degrees celsius? show all work asap