Chemistry, 23.11.2022 10:55 aimeedelacruz24

aspartame is an artificial non-saccharide sweetener that is commonly used as a substitute to sugar. it is usually consumed by people suffering from diabetes, enabling them to enjoy sweet-tasting foods without carbohydrates. calculate the percentage composition of all elements present in aspartame, if its chemical formula is C14H18N2O5

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Answer from: cleik

SOLUTION:

Step 1: Calculate the molar mass of C₁₄H₁₈N₂O₅.

Note that the molar masses of C, H, N, and O are 12.011 g, 1.008 g, 14.007 g, and 15.999 g, respectively.

$\begin{aligned} \text{molar mass of} \: \text{C}_{14}\text{H}_{18}\text{N}_2\text{O}_5 & = \text{14(12.011 g) + 18(1.008 g) + 2(14.007 g) + 5(15.999 g)} \\ & = \text{294.307 g} \end{aligned}$

Step 2: Solve for the percentage composition of C₁₄H₁₈N₂O₅.

• For C

$\begin{aligned} \%\text{C} & = \frac{n \times \text{molar mass of C}}{\text{molar mass of} \: \text{C}_{14}\text{H}_{18}\text{N}_2\text{O}_5} \times 100\% \\ & = \frac{14 \times \text{12.011 g}}{\text{294.307 g}} \times 100\% \\ & = \boxed{57.14\%} \end{aligned}$

• For H

$\begin{aligned} \%\text{H} & = \frac{n \times \text{molar mass of H}}{\text{molar mass of} \: \text{C}_{14}\text{H}_{18}\text{N}_2\text{O}_5} \times 100\% \\ & = \frac{18 \times \text{1.008 g}}{\text{294.307 g}} \times 100\% \\ & = \boxed{6.16\%} \end{aligned}$

• For N

$\begin{aligned} \%\text{N} & = \frac{n \times \text{molar mass of N}}{\text{molar mass of} \: \text{C}_{14}\text{H}_{18}\text{N}_2\text{O}_5} \times 100\% \\ & = \frac{2 \times \text{14.007 g}}{\text{294.307 g}} \times 100\% \\ & = \boxed{9.52\%} \end{aligned}$

• For O

$\begin{aligned} \%\text{O} & = \frac{n \times \text{molar mass of O}}{\text{molar mass of} \: \text{C}_{14}\text{H}_{18}\text{N}_2\text{O}_5} \times 100\% \\ & = \frac{5 \times \text{15.999 g}}{\text{294.307 g}} \times 100\% \\ & = \boxed{27.18\%} \end{aligned}$

Hence, aspartame is composed of 57.14% C, 6.16% H, 9.52% N, and 27.18% O by mass.

Answer from: Quest

Forensic analysis is based on chemical instrumentation techniques.

Explanation:

Chemistry is very relevant to criminology, particularly in the field of forensics. Criminal investigation is heavily reliant on chemical laboratory and analysis. Two examples include illegal narcotic identification and DNA analysis.

Chemical instrumentation techniques, such as Fourier Transform Infrared Spectroscopy (FTIR), Gas Chromatography-Mass Spectrometry (GC-MS), and Liquid Chromatography are used to identify if an unknown substance collected for example in an illegal drug raid is actually an illegal drug and not just a harmless powder. Results from these tests are compared to a database of known results from illegal drug to confirm their identity.

DNA Analysis is also based on biochemistry techniques, where various techniques are used to extract, replicate and match a sequence of DNA found in a crime scene from one from the suspect.

Answer from: Quest

Similarities and Differences Between the Ancient Greek Concept of an Atom and Dalton's Atomic Theory

There are various similarities and differences between the ancient Greek concept of an atom and Dalton's atomic theory. One key point that is similar in the two concepts was that all matters are made up of small and invisible atoms. Aside from that, some similarities between the ancient Greek concept of an atom and Dalton's atomic theory include stating that atoms are indestructible and indivisible. Further, both theories formulated that atoms have different size and mass.

Differences Between the Ancient Greek's Concept of an Atom and Dalton's Atomic Theory

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aspartame is an artificial non-saccharide sweetener that is commonly used as a substitute to sugar....