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A 25.00 ml of vinegar sample was diluted to 250 ml using a volumetric flask. A 50.0 ml aliquot portion of the dilute vinegar solution needed 35.45 ml of 0.1200 M NaOH to reach the phenolpthalein end point. (a) Calculate the no. of millimoles of NaOH required to reach the endpoint (b) Calculate the no. of millimoles of acetic acid present in the 50 ml aliquot portion that was titrated (c) Concentration of acetic acid in the titrated aliquot portion (d) The concentration of acetic acid in the volumetric flask (e) Calculate the total mass of acetic acid dissolved in the solution contained in the volumetric flask (f) The mass(g) of acetic acid dissolved in the solution contained in the volumetric flask came drom the 25.00 ml vinegar sample. Calculate the mass of acetic acid present in the 25 ml vinegar sample. (g) Calculate the % CH3COOH (w/v) present in the 25.00ml vinegar sample
Four atoms of iron (Fe) are to be combined with three molecules of oxygen (O2). How many total iron atoms and oxygen molecules will be combined during the formation of Fe3O4?
A sample of an unknown gas effuses in 12.4 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.59 min.
If 7.00 mol calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2) will be produced?
A certain mass of oxygen was collected over water when potassium chlorate was decomposed by heating. The volume of the oxygen sample collected was 720. mL at 25.0 oC and a barometric pressure of 755 torr.
Which instrument can be used to determine the total calcium in a small blood sample.suggest a second method suitable for determine the free calcium ions on a similar sample of bood.
Determine what is the density of the oxygen gas in the full bottle If A cylindrical gas lecture bottle has internal dimensions of 18.0 cm in diameter and a height of 49.0 cm and weighs 1.75 kg when empty.
What do you expect will happen to the position of this equilibrium when the total pressure of the gases in the reaction mixture is doubled by injecting some argon (Ar) while maintaining the temperature constant.
One liter of a gas has a pressure of 150.00 kPa at 25.0°C. If the pressure increases to 600.0 kPa and the temperature to 100.0°C, what would be the new volume of the gas?
Check all that apply Water is important to life because: - it does not dissolve certain substances - it causes brownian motion - it is colorless and odorless
If 1.56g of a gas has a volume of 1.00 L at .984 atm and 50 degrees Celcius, what is the molar mass of the compound
Determine which enantiomer of 2-iodo-3-phenylbutene gives the E product (2R, 3R or 2S, 3R), and explain clearly (using unambiguous diagrams) why that is the case.
What organic product(s) is formed when 1-methylcyclopentanol is heated in the presence of an acid catalyst?
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