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Problem- In the experiment of classifying matter by properties what common substance can be found in all three physical states under various atmospheric conditions? Give a common name. For each state.
Classify each of the following as either an element, a compound, or a mixture:
Aluminum
Milk
Chlorine
Carbon monoxide
Soda pop
Sodium chloride
Write your solution in appropriate format and provide references
A 45.0g sample of an alloy was heated to 90.0C and then droped into a beaker containing 82.0g of water at 23.5C. The temperature of the water rose to a final 26.2C. What is the specific heat of the alloy
After filtration, the remaining NaCO3 solution needed 0.004moles of H Cl for neutralization. Calculate the number of moles of NaCO3 remaining after filtration., therefore deduce the number of moles of BaCl2 which reacted with the NaCO3 solution.
A solution of Na2CO3 is added dropwise to a solution that contains 1.14Ã-10âˆ'2 M Fe and 1.53Ã-10âˆ'2 M Cd . What concentration of CO3 is need to initiate precipitation?
Calculate q, and determine whether heat is absorbed or released when a system does work on the surroundings equal to 64 J and ?U = ?213 J.
ascorbic acid vitamin c c6h8o6is a water-soluble vitamin. a solution containing 81.0g of ascorbicacid dissolved in 230g
To what volume should you dilute 40.0ml of a 4.65M KI solution so that 27.0ml of the diluted solution contains 3.95g of KI ?2.) An aqueous NaCl solution is made using 111g of NaCl diluted to a total solution volume of 1.00L .Calculate the molality ..
A 250.0 -mL buffer solution initially contains 2.5X10^-2 M of HCHO2 and 2.5X10^-2 M of NaCHO2. What mass of the correct reagent should you add. pH 4.10
Why is it important to not look directly at the flame of burning magnesium should the metal ignite during this experiment?
Problem- Estimate the total work that can be obtained by combusting butane (C4H10) at 2700K. (assume liquid water is produced). State other assumptions.
Calculate (a) the maximum non-expansion work, and (b) the maximum work that can be obtained from the freezing of supercooled water at -5 oC and 1.0 atm.
calculate the energy values and degeneracies of the lowest three energy levels of an electron confined to move in a
For the reaction 2A+B=3C the value of Kc=10.2 at 25 degrees C. A 1L vessel contained a mixture of 0.50 mol of A, 1.20 mol B and 4.00 mol C at the same temperature. Is the mixture in a state of equilibrium. If not predict the direction of reaction
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