Determine the empirical formula for the compound that has 71.98% C, 6.71% H and 21.31% O. Thank you!

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood

The diagram below shows the movement of particles. what does this piece of evidence best support? the collision theory the maxwell-boltzmann distribution the effect of pressure on reaction rates the effect of temperature on reaction rates