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Compute the empirical formula of a 0.7221g sample of a compound containing the subsequent masses of elements Carbon 0.2290g, hydrogen 0.05489g, nitrogen 0.2318g, and oxygen 0.1328g
If a sample of Mg is not fully thermally decomposed during the procedure, will the mole ratio of Ca to CO2 be higher or lower? Explain.
Although the term "melting point" is used to describe a solid/ liquid change, we generally list melting ranges rather than single melting point. For most pure substances,
Calculate the pH of a solution that is 0.253M in nitrous acid (HNO_2) and 0.111M in potassium nitrite (KNO_2). Acid dissociation constant
Write the balanced chemical equation and determine How much propane is required to cook a pork roast that needs 1.6x10 3 kJ
A gas occupies 10.0 L at 44.1 psi and 27 degrees C. What volume will it occupy at standard conditions
Compute a wavelength of the yellow light emitted by a sodium lamp if the frequency of the radiation is 5.10*10^-14hz
A solution is initially 0.050M in acetate, CH3COO- (Kb = 5.6 x 10^-10). 10.0mL of 0.10 M HCl is added to 50.0mL of the acetate solution. The Ka for the conjugate weak acid of CH3CHOO- is 1.8 x 10^-5. Calculate the pH for this solution at equilibri..
Oxygen and sulfur combine to form a variety of differenet sulfur oxides. Some are stable molecules and some, including S2O2 and S2O3, decompose when they are heated
Calculate the values of Avogadro's number and the Faraday assuming the charge in an electron is 1.602 x 10^-19 coulombs/electron. Also calculate the mass the magnesium anode have lost during the process. The answers will be a number.
suppose a student attempts to do an ion exchange on a column that is already nearly saturated with CO2+ and Zn2+.
A system consists of an ideal monatomic gas initially at temperature 300.0 K, volume 4.000 L, and pressure 4.000 bar. For the following process, calculate the final values of T, P, V, q, w, ?U, and ?H.
Explain five observations which suggest that benzene should not be classed with the alkenes, however rather as a member of a separate class of "aromatic" compound, although the fact that its formula is often shown with three double bonds
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