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A sample of hydrogen chloride gas occupies 0.750 L at STP. What is the pressure in atm if the volume is 0.125 L at 20 °C? Express your answer with the appropriate units.
Aqueous solutions of sodium sulfide as well as copper (II) chloride are mixed together. State which statement is correct?
The B4O5(OH)4^2- ion, present in 5.0 ml of a saturated Na2B4O5(OH)4 solution at a measured temperature, is titrated to the bromocresol green endpoint with 6.51 mL of 0.146 m HCl. How many oles of B4O5(OH)4^2- are present in the sample
By how much is the oxidizing power of MnO4-/Mn2 couple decreased if the H concentration is deceased
if 1g of pyrrole and 1g of benzaldehyde are reacted with acid catalyst to form tetraphenylporphyrin what is the
Vitamin C is helpful in the absorption of what mineral (metal) when the two are present in the gut simultaneously?
A student prepared a solution of sodium carbonate by adding 2.111 g of the solid to a 250.0 ml volumetric flask and adding water to the mark. Some of this solution was transferred to a burette. Explain what volume of solution the student should tr..
a cylindrical specimen of a brass alloy 10.0 mm 0.3937 in. in diameter and 120.4 mm 4.740 in. long is pulled in tension
What volume (mL) of 0.663M potassium hydroxide aqueous solution is needed to neutralize [?this means to completely react with] 842 mL of 0.554M nitric acid?
Why does aluminum hydroxide readily dissolve in concentrated NaOH but not in concentrated NH3. Please give a thorough explanation, not just a short answer.
The mass spectrum of a compound that contains two bromine atoms gives isotope peaks with relative intensities of 1:2:1 for the M, M+2 and M+4 peaks, respectively. Explain why.
What is the final temperature, (in oC), after a 26.0 gram piece of ice at 0oC is placed into a styrofoam cup with 119.0 grams of water initially at 79.0oC? Assume no loss or gain of heat from the surroundings.
what mass of this substance must evaporate in order to freeze 190 of water initially at 24? the heat of fusion of water
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