The walls of the human heart are made of a specialized form of muscle tissue known as cardiac tissue. this cardiac, or heart, tissue contracts the chambers of the heart to cause rhythmical beating and blood circulation. tissues in the human body, such as cardiac tissue, are made up of

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!