Which two things cause the orbits of planets to be nearly circular? O A. Inertia
O B. Magnetism
O C. Gravity
O D. Electricity

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 ->

Which statement is best described as a atom

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer