NEED HELP ASAP WITH ALL THE QUESTIONS PLS

Correct the following volumes of gas from the indicated
temperature to standard temperature: 273 K

If two objects at different te, peraure are in contact with each other what happens to their temperature

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)

The sum of the oxidation numbers in a neutral compound is always