9. Given the following reaction: 2NO(g) + O2(g) → 2NO2 (g) How many liters of gaseous oxygen are needed
to produce 4.50 L of gaseous nitrogen dioxide, if both gases are being measured at STP?

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

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

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?