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Determine the electronegativity of each pair of elements? Also, classify each bond as pure covalent, polar covalent or ionic.1. K and Cl2. N and N3. C and S4. Na and Cl5. C and Cl
If a 1.00 cm^3 solid cube of alumina ceramic initially at 300 C is placed in 50 ml of H2O initially at 25C in a closed, insulated container: (a) what will be the final temperature of the system when thermal equilibrium is attained.
how many grams of KO2 are needed to produce 180.0 L of O2 at 18.0 C and 1.00 atm
What volumes of the stock solution will you have to pipet into the flasks to prepare standards and What mass of gas does the container contains If the volume of a container
A Solution is prepared by mixing 79 mL of 5.00M HCl and 24.0 mL of 8.00M HNO3. Water is then added until the final volume is 1.00L. Calculate [H+],[OH] and the pH for this solution.
The temperature of the calorimeter rises from 22.25 oC to 27.20 oC. A 2.500 g sample of glucose (C6H12O6) is then burned in the same calorimeter. The temperature of the calorimeter rises from 20.55 oC to 25.00 oC. What is the Hcombustion of glucos..
Describe which would give a more accurate determination by freezing point depression of the molar mass of substance that is soluble in either solvent. Why
The volume is decreased until the cell is essentially full of liquid n-butane with one a few bubbles of n-butane gas remaining. Explain what is the pressure of the cell
What is the typical range of Ka and Kb values for weak acids and bases. Which value represents the weakest and which the largest. What would be the pH of solutions 0.1 M in the acid or base at the extremes of the range.
A certain metal oxide has the formula MO where M denotes the metal. A 36.46g sample of the compound is strongly heated in an atmosphere of hydrogen to remove oxygen as water molecules.
Arrange the elements Li, Be, Ne, and Ar in increasing order of the energy required to remove an electron from their respective gaseous atoms.
how many grams of Cu2S could be produced if 100.0g of copper is heated with 50.0g of sulfur? what is the amount of excess reactant?
copper and zinc elements 29 and 30 respectively appear next to each other on the periodic table. a 5.50 g sample of
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