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?

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?

What is the relationship between wind and ocean waves? question 17 options: wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves. wind moving at higher speeds will transfer energy over a larger part of the ocean water, resulting in waves with a shorter wavelength. winds moving at higher speeds with cause water to move forward at faster rates, causing larger ocean waves. winds moving at higher speeds will affect deeper water, resulting in waves that move at a faster rate. how do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Iam hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?