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How many phases does carbon have? Carbon, like many elements or molecules has several solid phases. What are they?
a cube of osmium metal 1.500 cm on a side has a mass of 76.31 g at 25degc. what is the density in gcm3 at this
What mass of NH4Cl should the student dissolve in the solution to turn it into a buffer with pH =8.77
Problem- when 1.46 g of vitamin k is dissolved in 25 g of camphor the freezing point of the solution is lowered by 4.89 C. Calculate the molar mass of vitamin k
What is the mass of precipitate (in Grams) that forms when 235.5 mL of 0.129 M Na2SO4 solution is reacted with excess Ba(NO3)2 solution?
calculate a value for the equilibrium constant for the reaction below. hint when reactions are added together the
Calculate the potential of the following cell and indicate whether the reaction is expected to be spontaneous. Cr + 3 Ag+ ---> Cr3+ + 3Ag
A lab bench has 3 one L stoppered flasks. Flask A contains one mole of NH3 gas. Flask B contains one mole of N2 gas & Flask C contains one mole of SO2 gas. All are at the same temperature.
verify the law of multiple proportions for an element x which forms oxides having percentages of x equal to 77.4
What amount of NaOH ( a strong base), in mg, would be required to neutralize 100 mg of H2SO4 (MW=98) in 1 L of water.
assume that a gold atom is shaped like a sphere. an atom of gold has a radius of 156 pm and a mass of 197 amu.
Arrange the following solutions in order of increasing pH(from lowest to highest) and explain your reasoning. Assume each solution has a concentration of 0.10mol L-1
Show how each of the subsequent compounds could be synthesized from butanal. 2-Ethyl-3-hydroxyhexanal
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