2. Atoms & Elements

Calculating Molar Mass

Open Question
Which is the molar mass of BF₃? 10.81 g/mol 29.81 g/mol 48.81 g/mol 67.81 g/mol
1019
views
Open Question
Determine the formula weight of Ca(NO₃)₂. Provide an answer to two decimal places.
514
views
Open Question
What is the molar mass of 1-butene if 5.38 × 10¹⁶ molecules of 1-butene weigh 5.00 μg?
628
views
Open Question
What is the molar mass of Al₂(SO₄)₃? 150.03 g/mol 278.03 g/mol 342.17 g/mol 450.09 g/mol
646
views
Open Question
Determine the formula weight of Al₂(SO₄)₃. Provide an answer to two decimal places.
415
views
Open Question
What is the molar mass of (NH₄)₂O? Explain how you calculated this value.
482
views
Open Question
What is the molar mass of Mg₃(PO₄)₂, a substance formerly used in medicine as an antacid?
444
views
Open Question
What is the molar mass of Mg₃(PO₄)₂, a substance formerly used in medicine as an antacid?
487
views
Open Question
What is the molar mass of (NH₄)₂O? explain how you calculated this value.
453
views
Open Question
Determine the molar mass of Al₂(SO₄)₃･5H₂O. Provide an answer to two decimal places.
407
views
Multiple Choice
What is the mass in grams of 5.47 × 10^19 molecules of CCl2F2 (molar mass = 120.91 g/mol)?
324
views
Multiple Choice
What is the mass of sodium (Na) in grams present in 7.5 grams of sodium benzoate (NaC7H5O2)?
381
views
Multiple Choice
A 5.65 g sample of a weak acid with Ka=1.3×10⁻⁴ was combined with 5.20 mL of 5.90 M NaOH and the resulting solution was diluted to 750 mL. The measured pH of the solution was 4.20. What is the molar mass of the weak acid?
237
views
Multiple Choice
A condensation reaction involving 200 glucose molecules, C6H12O6, results in a polysaccharide. What is the molar mass, in g/mol, of the polysaccharide, assuming complete reaction and loss of water molecules?
352
views
Multiple Choice
Calculate the mass percent composition of carbon in C2H6O.
428
views