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Question- CCl2F2 is considered to be environmentally safe and is used as a refrigerant. The heat of vaporization of CCl2F2 is 289 J/g.
1) What mass of this substance must evaporate in order to freeze 2 moles of water initially at 20 °C? The heat of fusion of water is 334 J/g and the specific heat of water is 4.18 J/g-K.
Please explain solution of the above question
a 75 ml solution of 0.030 m caoh2 is titrated with 0.035 m hcl. calculate the ph of the mixture after 60 ml of hcl have
The true rate constant for a reaction is just that, a constant( at the constant temperature). Would your calculated value for k be higher than, lower than, or equal to the real value of k if 5 wt% bleach was unknowingly substituted with 8wt% bleac..
Describe an apparatus by which azeotrope formation can be used to drive the equilibrium toward the products, thus maximizing the yield.
Calculate the concentration of acid(or base) remaining in solution when 5.39mL of 6.93M HNO3 is added to 9.37mL of 8.37M NaOH. Note the final volume is the sum of two added volumes. which of the following statement is true for the solution after m..
How many moles of CO(NH2)2 are present in 145 g of water, if the freezing point of the solu- tion is -4.02?C? kf (water) = 1.86 K · kg/mol.
Write the molecular formula for the compound that exhibits a molecular ion at M+ = 96.0580. Assume that C, H, N, and O might be present, and use the exact masses from your text.
If the antacid for analysis is known to be Phillips' Milk of Magnesia, the solution does not need to be heated, but if the sample is Mylanta, the solution must be heated. Explain the difference in experimental procedures
MgNH4PO4 *6H2O has a solubility of 0.023 g/100mL in water. Suppose a 5.02 g sample were washed with 20mL of water. What fraction of the product would be lost.
benzoic acid is a white crystalline powder used as a foodpreservative. the compound contains 5.0 hydrogen 26.2 oxygen
(a) Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (b) What is the pH in the Pt | H+ | H2 half-cell. (c) What is the value of the equilibrium constant for the reaction occurring in this cell
Compose a judgment as to the effectiveness of commercial liquid bleaches by noting the ingredients on the labels. Explain
Assuming this particle is a single crystal, how many unit cells are lined up across the diameter of the particle? d. Calculate the mass of the particle. e. Approximately how many atoms does this particle contain?
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