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In a hydrogen fuel cell, hydrogen gas and oxygen gas are combined to form water. Write the balanced chemical equation describing this reaction (using lowest whole-number coefficients).
Identify the oxidizing agent and reducing agent.
Determine the number of electrons transferred in the balanced chemical equation.
Platinum(II) forms many complexes, amond them those with the following ligands. Give the formula and charge of the complex with two ammonia molecules and one oxolate ion(C2O4^2-).
What is the limiting reactant when 4.5 moles of aluminum react with 6.7 moles of oxygen gas?
When 9 mL of a solution containing 2.5 M AlBr3 is diluted to 30 mL, a dilute solution is formed. What is the Br- concentration in 15 mL of the dilute solution?
Write three orbital designations that would be incorrect and explain why each is incorrect. For example, 1p would be an incorrect orbital designation because there is no p sub-shell in the first orbit.
How much heat is evolved when 1259 g of water condenses to a liquid at 100°C? ΔHcond = -40.7 kJ/mol.
Complete and balance the following redox equation that occurs in acidic solution using the set of smallest whole-number coefficients. What is the sum of all the coefficients in the equation
The precipitate formed was washed and dried .Its mass was 0.287g.Find the mass of NaCl in the initial sample.
Include activity coefficients in your solubility-product expression. The Ksp of Hg2I2 is 4.6× 10-29.
H2S and H2O have simipar structures and their central atoms belong to the same group. Yet H2S is a gas at room temperature and H2O is a liquid. Use bonding principles to explain why.
A gram of a salt dissolves in 4.9ml of water to from a saturated solution whose specific gravity is 1.08, how many gram of salt will be contained in 100ml of the saturated solution
The phosphorous anion (P-) has how many total electrons and how many valence electrons?
Calculate the molar mass (g/mol) of the element to three significant figures.
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