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3.6ml of m-xylene(d=0.864 g/ml) is reacted with 0.6g of pthalic anhydride and 0.2 g of ALCL3 to obtain the product. the actual yield is 0.36g. using this data answer the following.
a) Write a chemical equatio for the formation of product
b) Which one is a limiting reagent?
c) What is the percentage yield?
Consider the electronic transition from n = 2 to n = 4 in a hydrogen atom and select the correct statement below.
A Solution of 1.69g of this compound in 9.23g of benzene freezes at 2.18 degree celsius. What are the molecular formula and molar mass of the compound? ( the normal freezing point of pure benzene is 5.50 degree celsius)
0.4 grams sample of primary standard Na2CO3 treated with 45mL of dilute perchloric acid. Solution boiled to remove CO2 and then the excess HClO4 back titrated with 13mL of dilute NaOH
When doing a recrystallization, why is it important to allow the saturated solution to boil for ~1 minute and cool SLOWLY to room temperature before placing it in an ice-water bath?
Arrange the following isoelectronic series in order of decreasing radius, from largest to smallest Cl- p^3- Ca^2+ K+ S^2-
The energy required to ionize boron is 801 kJ/mol. What minimum frequency of light is required to ionize boron?
A gas is allowed to expand at constant temperature from a volume of 2.0L to 11.2 L against an external pressure of 0.750 atm. If the gas absorbs 128 J of heat from the surroundings
the pH of the solution is 9.15. After adding 16.55 mL of hydrochloric acid to your sample, the pH is 8.78. Calculate the first derivative of the function of the pH of your solution with respect to the volume of titrant added
A 25.0-mL sample of potassium chloride solution was found to have a mass of 25.115g. When the solution was heated to dryness, the mass of the solute residue was 0.252g. Calculate the (a)mass/mass % concentration and (b) molar concentration.
determine the trend in sizes of the ions o2-n3- f- and also explain why does the trend exist? also describe which of
The rate of decrease in N2H4 partial pressure in a closed reaction vessel from the reaction N2H4(g)+H2(g)?2NH3(g) is 80torr/h . What is the rate of change of NH3 partial pressure in the vessel?
sulfuric acid acts as a catalyst for making esters. Write an equation showing the production of Isoamyl alcohol
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