19. Which change to a DNA molecule would have the least effect on an organism? an addition to a base sequence at the beginning of a gene
O a substitution that creates a "stop" code in the middle of a gene
O a substitution in a base sequence that does not code for a protein
a deletion from a base sequence in the middle of a gene

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Your awser would be a acetone

Answeropposite;

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