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Why are the melting points of ionic compounds higher than the melting points of molecular compounds?
calculate the mass of propylene glycol that must be added to 0.340 of water to reduce the vapor pressure by 2.86 at 40
Gas was obtained by boiling liquid nitrogen stored in a 175.0 L tank. What volume ofN2 is released at 0.940 atm of pressure and 25 C from a tank full of liquid N2(d=0.808g/mol)
What is the volume occupied by 27.0g of argon gas at a pressure of 1.08atm and a temperature of 320K
What values are quoted in handbooks for common hydrates of your cation?
How many electrons can be described by the quantum numbers n=7 and l=2? the answer is 10, why is this
Given the following unbalanced chemical equation: Al + Cl2-> AlCl3, balance the equation. How many moles of AlCl3 are produced from 5 mole of Cl2? Show your work. What is the molar mass of AlCl3? Show your work. Calculate the number of grams of A..
Question- Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.
Two reactions have the same activation energy, but their rates at the same temperature differ by a factor of 10. Explain.
A particular drain cleaner contains NaOH. What is the value of [OH-] in a solution produced when 50.0g of NaOH dissolves in enough water to make 250mL of solution
Question- We considered mixing a strong base with a weak acid, but we did not consider mixing a strong acid with a weak acid. Consider mixing 0.1M HNO3and 0.1M HNO2. Predict the pH of the solution and the percent ionization of the nitrous acid. Ra..
A 0.300 M solution of an acid, HZ, has a pH = 1.301. What is the value of the ionization constant, Ka, for this acid
The unit cell of a crystalline material containing Ca, O and Ti can be described as follows. The unit cell is face-centred cubic, but with Ca atoms occupying the corner positions and oxygen atoms occupying the face positions.
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