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when 0.60 grams of a molecular covalent compound is dissolved in 10 grams of water, the freezing point of the soludion is -1.86 C. Given that the freezing point of pure water is 0 C and that the freezing point depression constant for water is 1.853 (C kg)/mol calculate the molar mass (g/mol) of this compound
Liquids "flow" quickly as measured by the speed at which a small amount of liquid will spread itself out to form a puddle. What does this behavior imply about the speeds at which the individual liquid particles are moving relative to each other?
empirical and molecular formula what are both the empirical and the molecular formula for the compounds described
Use the data given to calculate an overall energy change (in kilojoules per mole) for the formation of CsF2 from its elements.
What is the percent hydrogen (H) by weight of a solution containing 53.5mL of CH3COCH3? The density of acetone is 0.788 g/mL.
Calcium cyanamide, CaCN2, reacts with water to form calcium carbonate and ammonia; CaCN2(s)+3H2O(l)-->CaCO3(s)+2NH3(g). a) How many grams of water are needed to react with 75.0 g of CaCN2
How many grams of sodium hydroxide are needed to react completely with 50.1 mL of 0.145 MCoCl2 solution?
What is the vapor pressure of a solution that contains .944 moles Ba(NO3)2 and 30 moles of H2O? The vapor pressure of pure water at the same temperature as the solution is 46 torr
A 20.0-mL sample of 0.200 M HBr solution is titrated with 0.200 M NaOH solution. Calculate the pH of the solution after the following volumes of base have been added.
When the following reaction is balanced in acid solution using the lowest possible whole number coefficients, the coefficient of H+ will be: S8 + NO3- --> S4O62-+ NO2
The freezing-point depression of a 0.100 m (molality) MgSO4 solution is 0.225 degrees Celsius. Determine the experimental van't Hoff
The reaction can be represented as {\rm 2 NI_3 (s)\rightarrow N_2 (g) + 3 I_2 (g)},~{{\Delta H}}_{\rm rxn} = -290.0~{\rm kJ} Find the change in enthaply when 16.0g of \rm NI_3 decomposes.
Define the following terms: carbohydrate, monosaccaride, disaccharide, polysaccaride. Give an example of a simple sugar and name the functional group associated with your example.
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