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During steel formation, why do the following reactions cause the temperature in the converter to increase?2C (s) + O2 (g) --> 2CO (g) and Si (s) + O2 (g) --> SiO2 (l)
A space probe identifies a new element in a sample collected from an asteroid. Successive ionization energies (in attojoules per atom) for the new element are l1 = 0.507, l2 = 1.017, l3 = 4.108, l4 = 5.074, l5 = 6.147 l6 = 7.903, l7 = 8.294. To wh..
Calculate the density of the sample. Show all work and use significant figures and units.
In 0.1592 M solution, a weak acid, HA, is 7.11% ionized. Calculate the ionization constant for the weak acid.
Calculate the wavelength (in picometers) associated with a hydrogen atom moving at a speed of 3.13 x 10^5 cm/s.
What is the solubility in pure water of Ba(IO3)2 in moles per liter at 15 ?C? [Ksp (15 ?C) = 2.0 x 10-10]
A sample of lead releases 221 kJ of heat when freezing. What is the mass of the sample? DHfus = 23 J/g
A 4.20 g nugget of pure gold absorbed 299 J of heat. The initial temperature was 22.0°C. What was the final temperature.
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.077 M in NaClO?
What would the reaction: Bi + excess Cl2 yield? I know Bismuth can only attach to I think 3 chlorides because of the inert pair effect but I guess that's the part I'm unsure about! So would it be BiCl3
what are possible reasons for the differences observed in conductivity for H3PO4 and H3BO3? Explain it please. B) Write out the dissociation steps for H3PO4 and H3BO3.
If the methane contained in 2.00 L of a saturated solution at 25 degrees C was extracted and placed under STP conditions, what volume would it occupy.
a sample of co2 g in a piston at 7.5 atm and 1090. l is allowed to come to equilibrium against a constant external
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