(b)(i) Use the dat a in the table below to show, by calculating the numbers of moles,which reactant is in excess.(2)Substance Density/g cm3Molar mass/g mol-Ethanoic acid1.0560.1Propan-1-ol0.80460.1(ii)The mass of the ester collected was 35.0 g. Calculate the percentage yield of ...
since the masses are in grams, and moelcular weight is in g/mol, if you divide the mass by molecular weight you get just moles. just make sure what you do to one side of the equation you do to the other. And then just manipulate the equation the same way you did...
Here, P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Rearrange the equation to solve for the number of moles (n = PV/RT), and then multiply by the molar mass of air to find the mass....
There is no way that the weight can have 3 significant figures in the mass and then conjure 6 significant figures in the molecular weight. To make matters worse the pressure is only given to 1 significant figure. YUCK! Use PV = nRT to determine the moles of gas present. n=PVRT=0.1 ...
A 1 molar (M) solution contains 1 mole of solute in 1 liter of solution. A 1 micromolar (µM) solution contains 1 µmol of solute in 1 liter of solution. This is equivalent to 0.000001 (1 x 10^-6) moles per liter. A 1 picomolar ...
Based on this model, a method for calculating the molecular and energy parameters such as the hydration number, amount of moles of hydrate, amount of gas and water in it, its density and molar mass, and the energy and rate of hydrate formation was developed. A comparison of the calculated...
(Why do you not know a precise molarity if you use a precise mass balance?) How will you determine the moles of titrant at the end point of the titration? Describe titration and its use in conjunction with molar stoichiometry to determine...
Sulfur hexafluoride = SF6 molar mass 146 g/mol moles SF6 = 5.35 g x 1 mole/146 g = 0.03664 moles moles SF4 = 2.54 g x 1 mole/108 g = 0.02352 moles Total moles of gas = 0.03664 moles + 0.02352 moles = 0.06016 moles Mole fraction SF6 = 0.03664/0.06016 = 0.609 Mole fraction SF4 ...
A 1 molar (M) solution contains 1 mole of solute in 1 liter of solution. A 1 micromolar (µM) solution contains 1 µmol of solute in 1 liter of solution. This is equivalent to 0.000001 (1 x 10^-6) moles per liter. A 1 picomolar (pM) solution conta...
From theperiodic table, the atomic masses of the carbon and hydrogen atoms in hexane and benzene are: C = 12 g/mol H = 1 g/mol Use the molecular weights to find the number of moles of each component: molar weight of hexane = 6(12) + 14(1) g/mol ...