How many moles are in 53.15 g of H₂SO₄

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

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work