The mixtures of sodium carbonate and calcium nitrate react to precipitate calcium carbonate and sodium nitrate. this reaction is shown by which balanced chemical equation? a. na2co3(aq) + cano3(aq) → caco3(s) + nano3(aq) b. caco3(s) + 2nano3(aq) → na2co3(aq) + cano3(aq) c. caco3(s) + cano3(aq) → 2nano3(aq) + na2co3(aq) d. na2co3(aq) + ca(no3)2(aq) → caco3(s) + 2nano3(aq) eliminate

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 26 mm and 103 mm. the electric potential of the inner conductor with respect to the outer conductor is - 700 v (k = 1/4πε 0 = 8.99 × 109 n · m2/c2) the energy stored in a 1.0-m length of this capacitor is closest to

Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above