Which of the following is a weak base

a: vinegar
b: ethyl alcohol
c: ammonia
d: potassium hydroxide

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)