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Gold is a very conductive and ductile metal. One gram of gold can be pulled into a wire 2 km long. The density of gold is 19.3 g/cm3 and the melting point is 1337.3 K. What is the diameter of this gold wire?
A volume of 125 mL of H2O is initially at room temperature (22.0*C). A chilled steel rod at 2.00 *C is placed in the water. If the final temperature of the system is 21.1*C, what is the mass of the steel bar?
the average distance between mars and earth is about 1.3 108 miles. how long would it take tv pictures transmitted from
In a gas mixture, the partial pressures are argon 425 , neon 60 , and nitrogen 125 .What is the total pressure exerted by the gas mixture?
When she introduced 3.63E-2 moles of N2(g) and 6.18E-2 moles of H2(g) into a 1.00 Liter container, she found the equilibrium concentration of NH3(g) to be 9.68E-4 M.
The other flask is filled with Ar and has a volume of 1.85 L and a pressure of 115 torr. If the valve is open and the gasses mix and assuming that the temperature is constant, what is the final total pressure
What is the boiling point of a solution of benzene containing 0.2 moles of a non volatile solute in 125 grams of benzene given that pure bezene has a boiling point of 80.1
Ammonia and preheated air are mixed to form a gas containing 15.0 mol% NH3 at 500°C. If ammonia enters the mixing unit at 30°C at a rate of 600 kg/h and heat is lost from the mixer to its surroundings at a rate of 12.00 kW, determine the temperatu..
a chemist is commissioned to produce 50000 liters of 0.550 m aqueous phosphoric acid. the chemist can purchase solid
The nitrogen in a 4-tablet sample that weighed a total of 7.50 g was converted to ammonia by Kjeldahl digestion, followed by distillation into 100.0 mL of 0.1750 M HCl. The analysis was completed by titrating the excess acid with 11.37 mL of 0.108..
The first ionization energy of magnesium is greater than the first ionization energy of calcium. Explain. The first ionization energy of nitrogen is lower than the first ionization energy of oxygen. Explain.
If 1L of .15M NaOH is unprotected from mmol of CO2, what will be its new molarity when it is standardized agains a standard solution of HCl using
What is the enthalpy change when 1 mole of ammonia gas is decomposed into its elements?
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