Calculate the density of a sample if the mass is 2.98g and the volume is 2.12l

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Joan writes four numbers on the board in standard form, and then she writes their scientific notation