Final answer:
The molar mass of monobasic potassium phosphate (KH2PO4) is 136 g/mol.
Step-by-step explanation:
The molar mass of monobasic potassium phosphate (KH2PO4) can be calculated by adding the atomic masses of potassium (K), hydrogen (H), phosphorus (P), and oxygen (O).
The atomic masses for each element (rounded to the nearest whole number) are as follows: potassium (K) = 39 g/mol, hydrogen (H) = 1 g/mol, phosphorus (P) = 31 g/mol, and oxygen (O) = 16 g/mol.
Therefore, the molar mass of KH2PO4 is calculated as:
(39 g/mol for K) + (2 g/mol for H) + (31 g/mol for P) + (4 × 16 g/mol for O)
= 136 g/mol
Thus, the molar mass of monobasic potassium phosphate is 136 g/mol.