Question

determine the molecular formula and calculate the molar mass (in g/mol) of arginine, the essential amino - acid. the formula should be entered as cwhxnyoz (for example c2h2n2o2, omit coefficient if equal to 1), followed by other element if any. molecular formula is, molar mass is. attempts: 0 of 5 used save for later etextbook and media submit answer current attempt in progress view policies

Explanation:

Step1: Identify the elements and their counts in arginine

Arginine has 6 carbon (C), 14 hydrogen (H), 4 nitrogen (N), 2 oxygen (O) atoms. So the molecular formula is $C_6H_{14}N_4O_2$.

Step2: Calculate molar mass of each element

The molar mass of C is approximately 12.01 g/mol, H is approximately 1.01 g/mol, N is approximately 14.01 g/mol, O is approximately 16.00 g/mol.

Step3: Calculate total molar mass

For carbon: $6\times12.01 = 72.06$ g/mol; for hydrogen: $14\times1.01=14.14$ g/mol; for nitrogen: $4\times14.01 = 56.04$ g/mol; for oxygen: $2\times16.00=32.00$ g/mol.
The molar mass of arginine is $72.06 + 14.14+56.04 + 32.00=174.24$ g/mol.

Answer:

Molecular formula: $C_6H_{14}N_4O_2$, molar mass: 174.24 g/mol