Calculate The two naturally occurring isotopes of hydrogen are
hydrogen-1 (1.00783 amu; 99.9885 percent) and hydrogen-2 (2.01410
amu; 0.0115 percent). What is the average atomic mass of hydrogen?

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

What is the measured amount of a product obtained from a chemical reaction?

What is the chemical formula for dihydrogen monoxide