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1. It is noted that an iron nail was with the 12gms mass absorbs heat of 15 joule; you need to calculate the final temperature if initially this iron nail was at temperature of 28 degree Celsius?
2. We have a solution that having sucrose and water (68.4 g of sucrose (C12H22O11) in 300. g of H2O); determine the freezing point of this solution? given that mole of sucrose = 342 g and Kf for water = 1.86oC/m
Dinitrogen oxide ( nitrous oxide, or laughing gas ) is sometimes used as an anesthetic. Here are some data about the N2O molecule: N-N bond length = 113 pm; N-O bond length = 119 pm.
Lead ions can be removed from solution by precipitation with sulfate ions. Suppose that a solution contains lead(II) nitrate. Write complete ionic equation to show the reaction of aqueous lead(II) nitrate with aqueous potassium sulfate to form sol..
A piston has an external pressure of 11.0 rm atm. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.460 liters.
The oxygen atom with its 2s orbital forms a s bond with one of the three sp2 hybrid orbitals of the carbon atom; the two hydrogen atoms with their 1s orbitals each form a s bond with one of the three sp2 hybrid orbitals of the carbon atom.
Calculating standard enthalpy change, heat, and mass of a reaction, Methanol (CH3OH) is used as fuel in race cars. Calculate the standard enthalpy change for the reaction, assuming H2O(g) as a product.
How many atoms of neon occupy a volume of 14.3 L at STP.
the equilibrium would shift to the right making more products e. the equilibrium would shift to the left making more products
a metal sample weighing 37.6 grams, which has been heated to a temp of 100 degree cin boling water was placed in 48.6g of waterin a calorimeter. The inital temp of the water was 25.2 degree c.
Calculate the partial pressure of each, the total pressure and the composition of the liquid solution.
The three molecules naphthalene (C10), anthracene (C14), and tetracene (C18) have spectra shown below. Note that the y-axis is base 10 logarithmic with units of M-1 cm-1. If anthracene is used as a sunblock in sunglasses 1 mm thick
The ionization constant, Ka, for benzoic acid, HC7H5O2, is 6.28 × 10-5. What is the pH of a 0.15 molar solution of this acid
The half-life of tritium (31H) is 12.3 years. If 47.0 mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the nuclide will remain after 24.6 years?What mass of the nuclide will remain after 98.4 years?
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