Why does vinegar dissolve in water but oil does not? a. vinegar is nonpolar like water, but oil is polar. b. vinegar is a pure substance, but oil is already a mixture. c. vinegar is polar like water, but oil is nonpolar. d. vinegar is a mixture, but oil is a pure substance like water.

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

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false