Marking brain list. please answer one of them thank u.

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 4.20 mol fe and 6.70 mol nio(oh) react?