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A solution of silver nanoprisms that are approximately 40 nm in length displays a purple color. Calculate the number of silver atoms in a single silver nanoprism with the shape of an equilateral triangle with an edge length of 40 nm and a thickness of 5 nm. The density of silver is 10.5 g/cm^3. and the area of an equilateral triangle is :sqrt((3)/4)a^2 where a = edge length of the triangle
What is the molarity of urea, CO(NH2)2, if 98.3 mg of the 97.9% pure solid is dissolved in 5.00 ml of aqueous solution?
What is the total mass of water raised 68.7 m during this 206.0 minute period? (in kg) How long can the turbines produce 335.0 MW of power from the release of the mass of stored water calculated above? Assume the water sustains a friction loss of ..
A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
Calculate w (in kJ) when 265 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 358 K
The enthalpy of vaporization of water is 40.67 kJ/mol, the enthalpy of fusion for water is 6.01 kJ/mol, the molar heat capacity of liquid water is 75.4 J/(mol.C)
A 26.0-g sample of ice at -10.0°C is mixed with 114.0 g of water at 72.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
When the nuetron to proton ratio in a raditoactive isotope is higher than that required for stability, it main gain greater stability by emitting
A 0.115 M solution of a weak acid (HA) has a PH of 3.33. Calculate the acid ionization constant (Ka) for the acid.
Pressures up to 3000 (atm) are measured with a dead-weight gauge. The piston diameter is 0.17 (in). What is the approximate mass in (lbm) of the weights required
a pencil 7.5 inches long.if there are 2.54cm in an inch,how long is this pencil in decimeters?10dm=1m
the most common source of copper cu is the mineral chalcopyrite cufes2. how many kilograms of chalcopyrite must be
Give the number of atoms of the specified element in a formula unit of each of the following compounds, and calculate the molecular (formula) mass
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