Convert 8.2e-4 Molar of Mg to ppm
2Mg(s) + O2(9) --> 2Mgº(s) molar mass Mg = 24.30 g/mol molar masso2 = 31.98 g/mol molar mass Mgo = 40.29 g/mol If 12.6 grams of magnesium completely react to form magnesium oxide according to the equation given, how much magnesium oxide is produced?
a water concentration of calcium carbonate of 5.34x10^-3 mol/L. convert the concentration into mg/L
(6) A seawater sample has the following composition: Mass Concentrations Mol. Weight Molar Concentrations (a) Convert these mass concentrations to molar units (moles per liter) assuming density = 1.026 kg/L. Express the results using the appropriate M, mM, MuM, nM etc. notation (for example, 1.35x10^-3 M would be 1.35 mM, 1.35x10^-2 would be 13.5 mM and 1.35x10^-4 would be 135 MuM). (b) What is the salinity of this sample?
A caretenoid pigment with a molar mass of 548 g/mol has Ɛ = 15,500 L/mol-cm at λ = 600 nm. A sample of this pigment is first dissolved in 30 mL of hexane and then diluted to a total volume of 250.0 mL. A 10 mL aliquot is removed and diluted to 500 mL. This final dilution has A = 0.489 when measured at λ = 600 nm in a cell path length = 2.00 cm. Calculate the mass of...
Question 14 of 15 Determine the molar mass of Mg(NO3)2. g/mol 1 4 2 5 3 6 7 8 9
Constant R = 0.08206 L atm mol K 1. (1 pt) Convert 187.2 Torr to atmospheres. 2. (2 pts) Calculate the pressure of 1.64 mol of a perfect gas that occupies a volume of 21.4 L at room temperature (25°C). 3. (2 pts) What is the molar mass of a 28.0 g sample of a perfect gas that occupies a volume of 22.4 L at a pressure of 1.00 atm and at a temperature of 0°C? Name (print): Section No....
A student notice that the molar absorptivity was 962 mL/(mg*m). What is the molar absorptivity in units of L/(mol*cm)? The molar mass of the compound is 210g/mol.
b. What are the molar solubility (in uM) and mass solubility (in mg/L) of silver chromate. Ag Cros. in aqueous solution? (Assume no ion paring and neglect activity coefficients). (4 pts)
Molar Ratio Mass RuCls 3 Hz0 (4.05 mmol 100 mg Allopurinol (2 mmol ? 4 How much of Atlopurinot RunCls 3Ha Allopurincl product Mol ar Ratio 100 mg mass? Μα ss 2 #mole Rucl3 H20 molar mass=2a5. 9/moi Allopurin ol molor mass 136.1 9/mel