Answer:
0.748M
Explanation:
Molarity is defined as the ratio between moles of solute (The substance in the lower amount, ethanol) and liters of solution.
To solve the problem we need to convert the mass of ethanol to moles using its molar mass and the mL of solution to liters:
Moles ethanol:
molar mass:
C₂H₆O:
2C = 2*12g/mol = 24g/mol
6H = 6*1g/mol = 6g/mol
O = 16g/mol
Molar mass: 24 + 6 + 16 = 46g/mol
Moles are:
17.2g * (1mol / 46g) = 0.374 moles
Volume of solution:
500mL * (1L / 1000mL) = 0.500L
Molarity:
0.374moles / 0.500L =
0.748M
