A 3.35 g sample of an unknown gas at 81 ∘C and 1.05 atm is stored in a 1.75 L flask. What is the density of the gas?
density:
g/L
What is the molar mass of the gas?
molar mass:

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

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

There are main groups in the modern periodic table of elements