A compound having a molar mass of 167. 5 g/mole has the following percentage composition by mass: carbon, 42. 87%; hydrogen, 3. 598%; oxygen, 28. 55%; and nitrogen, 25. 0%. Determine the molecular formulas of the compound.

The ancestors of horses possessed feet with five digits. over time, with the development of grasslands, the digits fused and formed hooves. what evolutionary advantage did this transformation serve? a. it allowed them to climb rocky surfaces with ease. b. it allowed them to graze better. c. it enabled them to run faster from predators. d. it let them see clearly through the grasslands. e. it made them taller.

In this food web, which group would increase in number if snakes were eliminated? a. producers b. decomposers c. primary consumers d. secondary consumers e. tertiary consumers

Match each fossil with the layer where it’ll be present based on those conditions.