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solution z is prepared by mixing 0.15dm3 of solution X and 0.35 dm3 of solution Y. Solution X contains 0.12 mole of ammonia, NH3 while solution Y contains 0.09 moles of ammonium chloride, NH4CL. Determine the pH of solution Z after the addition of 0.01 mole of hydrochloric acid, HCl.( Given the pKb of NH3 is 4.75)
The hybridization of B in the BF3 molecule is
You have a 0.200mol piece of aluminum. How many atoms are present in the aluminum?
Why malachite is commonly processed using acid leaching method and chalcopyrite using froth flotation method
linoleic acid is an essential fatty acid in the human diet, which means that we need to include this acid as part of a healthful diet. linoleic acid is a major constituent of many vegetable oils, including peanut oil, corn oil, and soybean oil. If the mass of a beaker containing 23.0 mL of linoleic acid is 150.07g, and the mass of the empty beaker is 129.32g, what is the density of linoleic acid?
The concentration of H+ of a solution of NaOH its POH is 11.3 is?
If 6.30g of mercury oxide are thermally decomposed to mercury and oxygen
(a) What mass of mercury will be produced?
(b) How many oxygen molecules will be produced (Hg=208,O=16) Avogadro number=6.02×10^23
The complex [Fe(CO)3(OH2)3]2+ presents two isometric isomers.
1. Determine the irreducible representation of the stretch bands of CO in the two complexes.
2. Can you use the infrared spectroscopy to distinguish the two isomers ?
a) 200.0 g of Ca(C2H3O2)2 was found in the chemistry laboratory.
Calculate
i. the molecular mass of 1 mole Ca(C2H3O2) 2.
ii. the number of moles of Ca(C2H3O2)2 that exists
iii. the number of Ca(C2H3O2)2 molecules present
iv. the volume at STP if Ca(C2H3O2)2 is converted to gas.
v. the molarity of a solution made by dissolving 200.0 g of
Ca(C2H3O2)2 in 200 ml of water
Calculate the mass of pure sodium chloride that will yield enough hydrogen chloride gas to neutralize 25cm3 of 0.5M potassium trioxocarbonate (V) solution
