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1) Of the compounds MgF2, Mg(OH)2 , and HF, which is an acid, which is a base, and which is a salt? Use definitions from Lesson13 to defend your choices. For the acid and base, are they strong or weak? Explain how you know and what this means. (Lesson 13)
2) When silver tarnishes, silver metal reacts with sulfur compounds to form a gray deposit of Ag2S. If Ag reacts with S to form this compound, identify which element is being oxidized and which is being reduced. Explain how you know that this is true. Make sure to describe which atoms are gaining and losing electrons and explain why this happens. (Lesson 14)
Hydrogen cyanide, HCN, is a poisonous gas. The lethal dose is approximately 300 mg HCN per kilogram of air when inhaled.
A compound contains only carbon, hydrogen, and oxygen. Combustion of 51.34 g of the compound yields 75.26 g of CO2 and 30.81 g of H2O. The molar mass of the compound is 90.078 g/mol.
In the reaction P4 + 5 O2 → 2 P2O5, how many moles of O2 are consumed each time 0.5 moles of P2O5 form?
a gas-filled balloon having a volume of 2.50 l at 1.2 atm and 25degc is allowed to rise to the stratosphere about 30 km
A 1.000g sample of red phosphorus powder was burned in air and reacted with oxygen gas to give 2.291g of phosphorus oxide. Calculate the empirical formula & molecular formula of phosphorus oxide given the molar mass is approximately 282 g/mol
How many silicon atoms are there in 1 cm3 of material. Suppose you dope that 1cm3 sample of silicon with 1ppm of phosphorus that will increase the conductivity by a factor of a million. How many milligrams of phosphorus are required
Calculate the equilibrium partial pressures of C2H6, N2, NH3, and C2H4. Peq(C2H6) = . Peq(N2) = . Peq(NH3) = . Peq(C2H4) = . (b) Calculate KP for this reaction. KP =
Define why the bond order of N2 is greater than that of N2+ however the bond order of O2 is less than that of O2+
When a solution is formed by mixing solute B with solvent A, the vapor pressure of A falls to 80% of its value for the pure solvent. What is the composition of the solution
Imagine that you have a 6.00L gas tank and a 3.50L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
An aerosol can has an internal pressure of 3.85atm at 25 degrees celsius. What temperature is required to raise the pressure to 18.0atm
What is the standard free energy of the cell. Is this process spontaneous or non-spontaneous. It makes sense that in order to produce electricity, the plant's redox process should be spontaneous
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