Which of the following shows a physical change? a. h2(g)+o2(g)=h2o(l) b. 2ch3oh(l)+3o2(g)=2co2(g)+4h2o(l) c. nacl(s)=nacl(aq) d. 2agno3(aq)+cabr2(aq)=2agbr(s)+ca(no 3)2(aq(

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

What diagram shows the ionic compound of magnesium oxide

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: