20. A molecule of acetone and a molecule of propyl aldehyde are both made from 3 carbon atoms, 6 hydrogen atoms, and 1 'oxygen atom. The molecules differ in their arrangement of atoms. How do formulas for the two compounds compare?
O Both compounds have the same structural formula, but have unique molecular formulas.
Both compounds have the same molecular formula, but have unique structural formulas.
O Both compounds have unique molecular formulas and structural formulas.

The velocity would be 2 

The best answer choice for it would be  aqueducthop eit and add me if you would like

Use the universal gas law formula: pv = nrt now, the key word in this problem is stp, so at stp, temperature will always be 0 degrees celsius and pressure will always be 1.0 atm or 760 torr. given something is at stp, we already know the two variables pressure and temperature. the other thing we can find with the given information is moles. to find moles, just divide grams by molar mass of the element. 16.0g / 2(16.00)g/mol = 0.5 moles plug the values in to the equation pv = nrt (1.0 atm)( x ) = (0.5 )(0+273=273k) the r value is just a constant for when we use atm, liters, moles and kelvin. i'm assuming you want your answer in liters, but if you dont just move the decimal 3 to the right in your final answer. so when plugging these numbers in to your calculator and trying to find x, you get 11.20665 liters using significant figures the answer is 11.2 liters

The right answer is c.both apply to a certain region