A twisted ladder can be a model of the structure of a DNA molecule. In this model, what are the sides of the ladder made of? A. Nitrogen bases B. Amino acids C. Sugar and phosphate parts D. Oxygen and nitrogen

14. complete and balance the equations for the single displacement reactions. a. zn + pb(no3)2 -> b. al + niso4 -> 15. complete and balance the equations for the double displacement reactions. a. agno3(aq) + nacl(aq) -> b. mg(no3)2(aq) + koh(aq) -> 16. complete and balance the equations for the combustion reactions. a. __ ch4 + o2 -> b. __ c3h6 + o2 -> c. + o2 ->

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied