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Chapter 2: Problem 43

Write the molecular formula of glycine, an amino acid present in proteins. The color codes are: black (carbon), blue (nitrogen), red (oxygen), and gray (hydrogen).

Short Answer

Expert verified
The molecular formula of glycine is \(C_2H_5NO_2\).

Step by step solution

01

Identify the Corresponding Element for Each Color Code

Assign each color code mentioned in the problem to its corresponding element. In this case, black is for carbon (C), blue is for nitrogen (N), red is for oxygen (O), and grey is for hydrogen (H).
02

Count the Number of Atoms for Each Element

Make careful note the quantity of each element shown in glycine. Glycine structure is as follows: The central carbon (black) is attached to two hydrogen atoms (gray), one carboxyl group (consisting of one carbon (black), two oxygen atoms (red), and one hydrogen atom (gray)), and one amino group (consisting of one nitrogen atom (blue) and two hydrogen atoms (grey)). So there are 2 carbon atoms, 1 nitrogen atom, 2 oxygen atoms, and 5 hydrogen atoms.
03

Write the Molecular Formula

Combine the elements and their respective amounts to write the molecular formula for glycine. An important point to consider is to list the elements in the order of carbon, hydrogen, nitrogen, then oxygen. The molecular formula is \(C_2H_5NO_2\).

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Most popular questions from this chapter

Name these compounds: (a) \(\mathrm{KClO},\) (b) \(\mathrm{Ag}_{2} \mathrm{CO}_{3}\), (c) \(\mathrm{FeCl}_{2},\) (d) \(\mathrm{KMnO}_{4},\) (e) \(\mathrm{CsClO}_{3},\) (f) \(\mathrm{HIO}\) (g) \(\mathrm{FeO}\) (h) \(\mathrm{Fe}_{2} \mathrm{O}_{3}\) (i) \(\mathrm{TiCl}_{4},\) (j) \(\mathrm{NaH},(\mathrm{k}) \mathrm{Li}_{3} \mathrm{~N},\) (l) \(\mathrm{Na}_{2} \mathrm{O}\) \((\mathrm{m}) \mathrm{Na}_{2} \mathrm{O}_{2},(\mathrm{n}) \mathrm{FeCl}_{3} \cdot 6 \mathrm{H}_{2} \mathrm{O}\)

Explain why the chemical formulas of ionic compounds are usually the same as their empirical formulas.

For each of these species, determine the number of protons and the number of neutrons in the nucleus: \({ }_{2}^{3} \mathrm{He},{ }_{2}^{4} \mathrm{He},{ }_{12}^{24} \mathrm{Mg},{ }_{12}^{25} \mathrm{Mg},{ }_{22}^{48} \mathrm{Ti},{ }_{35}^{79} \mathrm{Br},{ }_{78}^{195} \mathrm{Pt}\)

Give the number of protons and electrons in each of the following common ions: \(\mathrm{K}^{+}, \mathrm{Mg}^{2+}, \mathrm{Fe}^{3+}, \mathrm{Br}^{-},\) \(\mathrm{Mn}^{2+}, \mathrm{C}^{4-}, \mathrm{Cu}^{2+}\)

Why do all atoms of an element have the same atomic number, although they may have different mass numbers? What do we call atoms of the same element with different mass numbers? Explain the meaning of each term in the symbol \({ }_{Z}^{A} \mathrm{X}\).
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