Find the mass in grams of 1.69 mol of phosphoric acid:
Correct answer: A. 165.6 g
- A. 165.6 g
- B. 157 g
- C. 148 g
- D. 138 g
Explanation
Moles = Mass / molar mass Moles x molar mass = mass in grams Molar mass of phosphoric acid H₃PO₄ = 98 g / mol 1.69 mol x 98 g /mol = mass in grams Mass = 165.6 g
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Fundamental Concepts of Chemistry
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
Practise Fundamental Concepts of Chemistry
894 free Fundamental Concepts of Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Fundamental Concepts of Chemistry questions
How many molecules are there in 2.1 moles of CO2:
Many elements have fractional atomic masses. This is because:
The properties of an element mostly corresponds to that isotope which has greater:
Spectrometry is used when reactants and products absorb _.
If 9.8g of sulfuric acid is dissolved in excess quantity of water, it will yield _ moles of hydrogen ion (H+) and _ moles of sulphate ions (SO42-):
A sample of 0.7 moles of metal 'M' reacts completely with an excess of fluorine to form 45g of MF2. How many moles of F are present in it?