Identify the equations that represent reactions that could occur. select all that apply. a) bacl2(aq) + na2so4(aq) ==> baso4(s) + 2nacl(aq) b) nabr(aq) + kcl(aq) ==> nacl(aq) + kcl(aq) c) nh4no3(aq) + agclo3(aq) ==> agno3(aq) + nh4clo3(aq) d) hch3coo(aq) + nahco3(aq) ==> nach3coo(aq) + co2(g) + h2o(l) e) 2naoh(aq) + cacl2(aq) ==> 2nacl(aq) + ca(oh)2(s)

A reaction is apparently said to occur if it proceeds via the formation of a precipitate or a gaseous product, or a visible color change is observed after the reaction.

A): This reaction occurs as there is a formation of white precipitate of barium sulfate.

B) NaBr(aq)+KCl(aq)-->NaCl(aq)+KCl(aq): This reaction does not occur because all the ions just remain as spectator ions in the solution as the products are aqueous too.

C) : This reaction does not occur because all the ions just remain as spectator ions in the solution as the products are aqueous too.

D):This reaction can be observed as this proceeds via the formation of gas bubbles of carbon dioxide.

E) :This reaction occurs as there is a formation of white precipitate of barium hydroxide.

So the correct answers are:

A)

D)

E)

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

pie chart because it is in percents ( % )