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CHEM 121 LAB FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED AND GRADED A+ ALREADY PASSED CA$13.04   Add to cart
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CHEM 121 LAB FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED AND GRADED A+ ALREADY PASSED
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CHEM 121 LAB FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED AND GRADED A+ ALREADY PASSED Which method of analysis generally is the fastest method, gravimetric or volumetric? Volumetric The label on plant food reads 25-20-17. What does this mean? 25% nitrogen 20% phosphorus 17% potass...

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  • June 22, 2024
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  • 2023/2024
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CHEM 121 LAB FINAL EXAM QUESTIONS WITH
COMPLETE SOLUTIONS VERIFIED AND GRADED A+
ALREADY PASSED

Which method of analysis generally is the fastest method, gravimetric or
volumetric?
Volumetric
The label on plant food reads 25-20-17. What does this mean?
25% nitrogen
20% phosphorus
17% potassium
Differentiate between qualitative and quantitative analysis.
Qualitative is what is in the sample, quantitative is how much of something is in the
sample.
There is a 1.290 g of phosphorus P in a 10.00 g sample of MgNH4PO4x6H20. What
is the sample percentage of P in the sample?
1.290/10.00 = .129g x 100 = 13%
How do you find out the limiting reactant in an experiment?
Which ever reactant runs out first is your limiting.
A student prepares a compound that contains 1.020g of Zn (atomic mass= 65.4
amus) and 1.108g cl (Am= 35.5) What is the empirical formula of the compound.
step one: divide g over the atomic mass= 1.020/65.5 = 0.0156.
1.108/35.5 =.0312
take the smallest number and divide it by both.
.0156/.0156=1 Zn
.0312/.0156= 2 Cl
ZnCl2

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