You have a buffer with a ph-5 at two different temperatures: t-300 k and t2 330 k ha(aq) + h2o a) → a-(aq) + h3o+ (aq) you need to have the following ratios of weak acid and conjugate base to make this happen: at t1 → [a-]/[ha-1/2 at t2- [a-1/[ha] 1/4 to answer the following questions you need to draw the plot of inkverses 1/t will this reaction be exothermic, endothermic or neither. a. exothernue b. the system entropy change will be: circle one: as > 0 as = 0 < 0

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Given the following reaction: c3h8+5o2=3co2+4h20 how many grams of co2 will be produced 7 g of c3h8 and 98 g of o2

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.