Calculate the ratio of h+  ions to oh–  ions at a ph  =  7. find the concentration of h+  ions to oh–  ions listed in table b of your student guide. then divide the h+  concentration by the oh–  concentration. record this calculated ratio in table a of your student guide.

compare your approximated and calculated ratios of h+  ions to oh–  ions at a ph  =  7. are they the same? why or why not? record your comparison in table a.

what is the concentration of h+  ions at a ph  =  7?

  mol/l 

what is the concentration of oh–  ions at a ph  =  7?

  mol/l  

what is the ratio of h+  ions to oh–  ions at a ph  =  7?

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Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.

Which best describes what forms in nuclear fission? a. two smaller, more stable nucleib. two larger, less stable nucleic. one smaller, less stable nucleusd. one larger, more stable nucleus