A.) A student completed the experiment but found that the total amount of materi

Question

A.) A student completed the experiment but found that the total amount of material recovered weighed more than the the original sample. What is most likely source of error and how it may corrected? B) A student found that the mass of the napthalene collected was less than the mass determined by difference. What would account for the smaller amount of napthalene collected? C.) Mothballs in a closet gradually disappear over time. What happens to this material? D.) In 100g. of sweet peas, there are 14.5g carbohydrates, 5.7g sugars, 5.1g dietary fiber, 5.4g protein and 0.4g fat. Calculate the percent composition of these components. THANKS!

Explanation / Answer

A. The most likely source of error is impurities. The material can be recrystallized from a different medium to reduce them.

B. Some Napthalene could have turned into gas and disappeared. This is due to exposure. This is called sublimation.

C. Mothballs contain Napthalene. They tend to sublime over time.

D. Carbo : 14.5 % ; Sugar : 5.7% ; Dietry fuber : 5.1% ; Protein : 5.4% ; Fat : 0.4%

The percentage composition is the same as weight coz the total base weight in 100gm.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.