If 20 ml of gas is subjected to a temperature change from 10°c to 100°c and a pressure change from 1 atm to 10 atm what's the best expression representing the new volume

In salt water solution, the salt is the blank

How do you know when a chemical reaction has occurred

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)