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Question: Why are the emission wavelengths for helium and hydrogen different.
The reaction vessel is charged initially with SO3(g) and NO(g), each at a partial pressure of 0.500 atm. In the space below, enter the equilibrium the partial pressure of SO2(g) in units of atm
At atmospheric sample is composed of nitrogen, oxygen, argon, water vapor, and trace other gases. If the partial pressure of nitrogen is 577 mmHg, oxygen is 148 mmHg, water vapor is 20 mmHg and argon is 7 mmHg, what is the observed barometric pres..
A biochemist wishes to prepare various phosphate buffers by mixing together two 0.20 M solutions that contain either sodium dihydrogen phosphate (NaH2PO4) or disodium hydrogen phosphate (Na2HPO4).
What are the direction and magnitude of the velocity of plane 1 relative to plane 2? What is the Degrees? ° north of east
The solubility of slaked lime, Ca(OH)2, in water is 0.185g/100mL. What volume of 0.00400 M HCl is needed to neutralize 14.5mL of saturated Ca(OH)2 solution
The silver chloride is virtually insoluble in water. In a titration, how many mL of 1.00M NaCl must be added to 25.0 mL of a 0.366M AgNO3 solution to completely participate the silver
A 2.914-g sample gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temperature greater than 170 C in a crucible until a constant mass is reached.
Give the balanced equation for the reaction: formation of 1 mol nitrogen dioxide from its elements (heat is absorbed)
A piece of silver with a mass 374g has a heat capacity of 88.5J/degrees C. What is the specific heat of silver
Explain both compounds have structures with six atoms in a ring. Depict Lewis structures for pyridine and pyrazine showing all resonance forms. Define the N atoms in the pyridine are opposite each other in the ring with 2 carbons
If a solution contains 0.01M Ca^2+, 0.01 M Zn^2+, and 0.01 M Ni^2+ ions and you want to separate them using aqueous (NH4)2C2O2, which ion will precipitate first as an ozalate, CaC2O4, ZnC2O4, or NiC2O4
calculate the formal concentrations of acetic acid and sodium acetate necessary to prepare a buffer solution of ph 5
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