Nina and her mother both have cell phones. Nina thinks her cell phone is lighter than her mother's. If Nina wants to compare masses of the cell phones what is the best tool for her to use?

A) thermometer
B) beaker
C) balance
D) graduated cylinder

If a bottle of olive oil contains 1.4 kg of olive oil, what is the volume, in milliliters ( ml ), of the olive oil?

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? : 1

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .