Why do scientists usually do experiments? a. to answer a question or solve a problem b. to make more problems for schoolchildren to solve c. because they think that they are fun d. because they want to get paid for the job

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

the answer is a) cell division.

hope this !