How many moles are there in 182.5 g of HCl? (molar mass 36.5 g/mol)
Answer and explanation
Correct answer: B. 5 mol
- Step 1: Moles equal mass divided by molar mass: mol. Answer: 5 mol. Why not the others: 6661.25 mol, 41.5 mol and 10 mol don't fit.
Practise more Chemical calculations.
Free questions with an explanation for every one, and full timed Medical Entrance Exam (University of Iceland) mock tests.
More Chemical calculations questions
- 2 mol of a solute is dissolved to make 0.25 litres of solution. What is the molarity?
- What is the pH of a strong base solution whose hydroxide ion concentration is 10⁻¹ mol/L at 25 °C?
- What volume does 1.5 mol of an ideal gas occupy at STP? (molar volume 22.4 L/mol)
- How many grams of water form when 4 g of hydrogen burns completely in oxygen? (; H = 1, O…
- What is the percentage by mass of magnesium in MgO? (molar mass of MgO = 40, mass of magnesium in it = 24)
- How many moles are there in 224 g of KOH? (molar mass 56 g/mol)