metalloids transition elements E 6. The molar masses of gases X, Y and Z are 28. 10 and 32 respectively Which of the following arrangements corresponds to the increasing order of diffusion rate A X Y Z B. ZYX C. Z. XY Ү D. Y. X. z X, Z,Y The diagram below shows the​

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.

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)