A student carrying out an experiment was in a hurry to finish. He decided to omit the centrifugal step, although the solution was cloudy. Should this cause a higher or lower result in the determination of the percent of copper in a brass sample? Higher percent or lower percent? Explain.

Could you help me this calculation part?  Mass of empty, dry crucible (g): 0.5gMass of crucible with sodium bicarbonate (g): 0.5gMass after first heating (g): 0.5gMass after second heating (g): XgMass after third heating (if needed) (g): YgC a l c u l a t i o n s : Show calculations and include all units. Circle your final answers, and include them in the data section as needed. 1. Calculate the mass of sodium bicarbonate sample used: 2. Calculate the theoretical yield of sodium carbonate based on your starting mass of sodium bicarbonate: 3. Calculate the mass of sodium carbonate obtained (this is your experimental yield): 4. Calculate the percent yield for sodium carbonate: Experimental x 100 = Theoretical

. Be sure to understand what the dilutionfactor is for each sample (dilution factor = the number used to determine the actualconcentration of the stock UK after the diluted samples are analyzed) ?

What might be a reason you obtained a percent yield of less than/greater than 100% for the mixture

determine the quantity of moles in 4.21 x 1023 molecules of CaCl2. List the steps clearly. Use cancelling method

describe why it is not critical to get all of the copper out of a test tube between trials of an empirical formula experiment

Balancing and stoichiometry

If the percentage yield is below 100%, what does that mean for your experiment? What possible errors couldhave occurred that resulted in a percentage yield below 100%?

Give the mass to mass stoichiometry calculation with FULL SOLUTION

The meat from one hazelnut has a mass of 0.985 g. (a) What is the mass of a millionth of a mole (106) of hazelnut meats? (A millionth of a mole is also called a micromole.) (b) How many moles are in a pound of hazelnut meats?