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water is a uniqu material in that the density of the solid is lower than the density of the liquid (which is why ice forms at the top of a pond and why ice floats in ours drinks). if the density for ice at 0 degree is 0.197g/mL and the density for water at 0 degree is 0.999g/mL what is the calcuated free space (as %) for each of these materials? why will need to estimate the volume of water as the sum of 2H atoms and 1 oxygen atoms with radii of 37 and 66 pm respectively. not that you will aslo have to assume a quantity of water to perform this exercise
How many moles of magnesium and moles of chlorine ions are present in 123.4 mL of a .345 M solution of magnesium chloride
an energy of 353 kJ/mol is required to cause a Mg atom on a metal surface to lose an electron. calculate the loses frequency of that can ionize a Mg atom.
What is the maximum number of moles of KClO3 that could form in the combination of 6.0 moles of Cl2 with 9.0 moles of KOH? Balanced equation is 3 Cl2 + 6 KOH goes to KClO3 + 5 KCl + 3H2O
Calcium nitrate will react with ammonium chloride at slightly elevated temperatures, as represented in the equation Ca(NO3)2(s)+2NH4Cl(s)--->2N2o(g)+CaCl2(s)+4H2O(g)
The titration reaction is CO3^(2-) + 2H+ yields H2O + CO2 What is the concentration of HCl if 25.9 mL of HCl was needed to to react with 0.311 g of Na2CO3 to reach the end point
They were also planning to react ethyl bromide with a nucleophile. They came across the following nucleophiles in the lab: i) OH- ii)CH3CO2- iii) HO2- iv) H2O What is the relative order of of their reactivity in an Sn2 reaction with ethyl bromide
Convince yourself that function exp(-4x) is an eigenfunction of operator d/dx. Compute the corresponding eigenvalue.
Water dissolves table salt (NaCl) because: A. NaCl is hydrophobic. B. NaCl has a polar covalent bond. C. water molecules surround the Na and Cl ions due to electric attraction.
Calculate the mass of potassium hydrogen phthalate, KHC8H4O4 (MM is 204.2 g/mol) needed to react completely with 20 mL of 0.1 M NaOH solution.
A student constructs a galvanic cell that has a strip oflead metal immersed in a solution of 0.1M Fe(NO3)2 as one half-cell and a strip of zincmetal immersed in a solution of 0.1M Zn(NO3)2 Which half-cell is the cathode
Why is gravity filtration and not suction filtration used to remove suspended impurities
Calculate the maximum amount of thorium ion that could be present in a waste water, if it is made 0.1500 M in oxalate ion. Assume the oxalate is present in stoichiometric amount, compared to the thorium.
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