An unknown compound has a percent composition of 52.10% potassium, 15.8% carbon, and 32.1% oxygen. the molar mass of the compound is 150.22 g/mol. what is the empirical formula and the molecular formula of this compound?

a. kco and k2c2o3
b. k2c2o3 and k6c6o9
c. k2c2o3 and k2c2o3
d. k2c2o3 and k4c4o6
e. k2c2o3 and kco1.5

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 does concentration affect reaction rate

What best discribes the relationship between wavelength and frequency in a electromagnetic wave