Astudent weighed 1.25 grams of nahco3 pre-weighed 50 ml beaker. in the fume hood, he slowly
added concentrated hcl to the beaker containing the nahco3. he added a total of 4.6 ml of
concentrated hcl. during the reaction, effervescence was observed due to carbon dioxide formation.
the water by-product was removed by heating the beaker and a white crystalline salt, nacl, is left.
lastly, he took the weight of the residue and the beaker after cooling to room temperature.
mass of beaker (g): 28.27 g
mass of nahco3 sample (g): 1.25 g
mass of beaker and residue (g): 29.06 g
volume of concentrated hcl (12moles/l) (ml): 4.6 ml
14. write the balanced chemical equation for the reaction.
15. how many moles of nahco3 are in the sample?
16. how many moles of hcl are there in the sample?
17. how many moles of hcl are required to react completely with nahco3?
18. which reagent is in excess and which reagent is limiting?
19. what is the theoretical yield of nacl in grams?
20. what is the actual yield of nacl in grams?
21. what is the percent yield of nacl in grams?

B.) falsehope this !

Sorry i dont understand the question can you rephase it?

The answer to your question really depends on three things: how much water you have, how cold it is to start out, and how cold the things around it are. water actually freezes when it gets to 32 degrees fahrenheit (0 degrees celsius), but the time it takes to get there may be different.  let's start with the first. if you take two glasses, and fill one with a tiny bit of water, and the other about halfway, then put them both in the freezer, the one with less water will freeze first (you can try this at home, but i recommend using plastic cups and not glass ones).  now let's move on to the second part. let's say you have two glasses, and you fill one with really cold water that has been in the refrigerator, and the other with really hot water from the sink. if you put both of them in the freezer, the one that started out colder will freeze first.  for the third part, let's imagine that you have two glasses with the same amount of water in them, and the water is at the same temperature. imagine putting one outside on a really really cold day in georgia, and having a friend in alaska put one outside on the same day. since it would be so much colder in alaska, the glass of water there would freeze before yours.  so, if you took a tiny bit of really cold water in a glass, and put it outside on a cold day in alaska, it would freeze a lot faster than a big glass of hot water outside on a cold day in georgia. 

Answer246 k;