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What volume of 0.50 M sodium hydroxide is needed to titrate 150 mL of 0.33 M hydrocyanic acid (HCN) to the equivalence point?
how to calculate mole fractions of two sustances given their weight percentages ,grams
when you heated the hydrated compound this process starts slowly at first find out the reason behind this?compute k for
You have a sample that consists of 8.2 (+ or -)o.1mL of aqueous 239Pu solution. You measure two 10mL aliquots by liquid scintillation counting and get 3211.4 cpm and 3315.2 cpm, respectively.
The solubility constant of TlBr is Ksp = 3.6 × 10-6 and the solubility constant of AgBr is Ksp = 5.0 × 10-13. Determine the range of NaBr volumes over which each solid precipitates.
Estimate the mass of water that must evaporate from the skin to cool a body by 0.10, if the mass of the body is 91 and its heat capacity is 4.0 . (Assume that the heat transfer is 100 efficient.)
If we inject 120.0 mL of liquid helium and allow the entire system to warm to room temperature (25°C), what is the pressure inside the bottle
If a sample that is 1.200g in 25.0mL of heptane is cooled to 0 degrees C, what would be the percent recovery of the solid that would be collected? (M.P.=80 degrees C)
The unit cell of platinum has a length of 392.0pm along each side. Use this length and your answer from part a (14 particles in unit cell, coordination #=12, 4 unique particles per unit cell) to calculate the density of platinum metal in kg/m3
A gaseous organofluorine compound has a density of 0.496 g/L at 17 deg. C and 189 mm Hg. What is the molar mass of the compound
Which of the following hormones requires selenium for its synthesis?
a coffee contains 100 ml of h2o. initial temperature of calorimeter is temperature 23c.if 8.20g of cacl2 is added to
potassium hydrogen phthalate, a monoprotic acid with a molecular weight of 132 g/mol
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