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1) how many grams of glucose are needed to prepare 400 g of 2% m/m glucose solution? 2) how many moles of cacl2 are in 250 ml of a 3 m of cacl2 solution? 3) How many liters of oxygen gas form when 294 g of KClO3 completely react in the following reaction? 4) What is theangle between electron groups in the linear electron geometry?
Determine the number of bonding electrons and the number of nonbonding electrons in the structure of SI2. Determine the number of bonding electrons and the number of nonbonding electrons in the structure of CO2.
If ocean consisted of 3.5% salt by mass,what would be the freezing point of the ocean? Assume the Density of H2O= 1.00g/ml and that the whole ocean would freeze at the same temperature everywhere.
An aqueous solution contains 3.00% phenylalanine (C9H11NO2) by mass. Assume the phenylalanine is non-ionic and nonvolatile. Find the following
Tris is widely used in a biochemical laboratory. Its acid dissociation constant is 8.32 x 10^-9. You have available at your lab bench a 0.1 M solution of Tris in its protonated form, 0.1 M solution of HCL and NaOH,
Calculate the energy in joules and calories required to heat 5.25 g of water from 5.5 oC to 64.8 oC.
A compound is constituted by mass of 22.6% phosphorus, the rest being chlorine. Given that a volume of 307 mL of the gas has a mass of 1.55 g at 25 °C and 90 kPa, find the molecular formula for this compound
Using the information given, write an expression which would give the solubility, S, as a function of the chloride ion concentration, [Cl-]. This means include all the equilibria.
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400 g of water
A chemist wants to make 6.5L of a 0.310M CaCl2 solution.What mass of CaCl2 (in g) should the chemist use?
At -11.0 °C (a common temperature for household freezers), what is the maximum mass of sorbitol (C6H14O6) you can add to 2.50 kg of pure water and still have the solution freeze? Assume that sorbitol is a molecular solid and does not ionize when i..
Multiple choice questions in Nuclear chemistry - As the temperature of a sample of a radioactive element decreases, the half-life will
A student makes a voltaic cell using zinc solid metal, zinc chloride, tin solid metal and tin chloride, and of course a salt bridge filled with KCl. What voltage would you expect from this cell at room temperature and 1M solutions
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