what mass of a compound with molecular formula c4h9cl is needed to make 25 ml of...
What is the molecular formula of a compound given the molar mass of the compound is 108.2 g and the empirical formula is C2H3? A) C3H12 B) C6Họ C) C&H6 D) C2H3
What is the molecular formula of a compound given the molar mass of the compound is 106.1 gram and the empirical formula is C3H3N? C. Ho N₂ C.H.N3 C3H3N2 C3H3N Cq2H₂ 2 Na
What is (a) the empirical formula and (b) the molecular formula of a compound (molecular mass=60.10 g/mol) containing carbon and hydrogen? A lab technician combusts the 0.7148 g sample and it produced 1.048x10^3 mg CO2 and 8.573x10^-1 g pf hydrogen.
An unknown amount of a compound with a molecular mass of 294.46 g/mol is dissolved in a 10 mL volumetric flask. A 1.00 mL aliquot of this solution is transferred to a 25 mL volumetric flask, and enough water is added to dilute to the mark. The absorbance of this diluted solution at 343 nm is 0.456 in a 1.000 cm cuvette. The molar absorptivity for this compound at 343 nm is €343 = 5721 M-?cm-1. What is the concentration...
An unknown amount of a compound with a molecular mass of 284.04 g/mol is dissolved in a 10 mL volumetric flask. A 1.00 mL aliquot of this solution is transferred to a 25 mL volumetric flask, and enough water is added to dilute to the mark. The absorbance of this diluted solution at 347 nm is 0.472 in a 1.000 cm cuvet. The molar absorptivity for this compound at 347 nm is ?347=6023 M−1cm−1. What is the concentration of the...
Question 8 of 12 > What is the molecular formula of a compound with the empirical formula BBr, and a formula mass of 341.24 amu? molecular formula What is the molecular formula of a compound with the empirical formula CH,O and a formula mass of 180.156 amu? molecular formula:
A compound has the formula XMnO4. X accounts for roughly 25% of the mass of the compound. Which is the cation and which is the anion in this compound, X or MnO4? What is the name of the anion? What is the charge of the anion? What is the likely group of the cation? Ions have a molecular mass the same way that atoms have an atomic mass. This is found by adding together the atomic masses of the constituents....
An unknown amount of a compound with a molecular mass of 270.93 g/mol is dissolved in a 10-mL volumetric flask. A 1.00-mL aliquot of this solution is transferred to a 25-mL volumetric flask and e water is added to dilute to the mark. The absorbance of this diluted solution at 339 nm is 0.517 in a 1 cm cuvette. The molar absorptivity for this compound at 339 nm is esso- 5835 M-1cm-1 (a) What is the concentration of the compound...
Calculate the mass of oestrogen (molecular mass 270 g/mol) required to make 150 mL of a 5.5 mM solution. Select the appropriate units. HINT: First calculate amount (moles) based on the formula amount = c × V (you may have learned this formula as n = c × V; A = C × V) then convert moles to grams using g = mol x molecular mass
The average formula for low molecular mass starch is (C6H10O5)200. When 0.789g of starch is dissolved to make 100.0 mL of solution, what is the Osmotic pressure, in mmHg at 25 celsius?