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Which is the limiting reagent when 9 Ca atoms and 8 H3PO4 molecules react and produce 3 molecules of Ca3(PO4)2 and 9 molecules of H2? Write a balanced chemical equation.
a. H2
b. H3PO4
c. Ca
d. Ca3(PO4)2
e. None of these.
How much heat energy, in kilojoules, is required to convert 65.0g of ice at 18.0 degrees celcius to water at 25.0 degrees celcius.
The solubility of the ionic compound M2X3, having a molar mass of 205 g/mol, is 3.16 10-7 g/L. Calculate the Ksp of the compound.
A 28.0-g sample of nitrogen gas combines completely with 6.0 of hydrogen gas to form ammonia. What is the mass of ammonia formed.
2C4H10 + 13O2 → 8CO2 + 10H2O A. How many moles of O2 are needed to react with 3.75 moles of C4H10 ? B. How many grams of CO2 result when 85.5g of C4H10 react ?
Derive the expression for the energy of a molecule, Consider the system of a gas adsorbed onto a surface. The gas can be treated as a two-dimensional ideal gas
Calculate the percent composition by mass of C, H, and O in cinnamic alcohol. How many molecules of cinnamic alcohol are contained in a sample of mass 0.469g.
A solution of ethanol (C2H5OH) in water is prepared by dissolving 58.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 235.0 mL of solution. What is the molarity of the ethanol in this solution?
If Kp = 0.032 at this temperature, what will be the equilibrium overall pressure starting from pure CaSO4(s)?
A student takes 185. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of Phosphorus-32 , how many grams of P-32 will remain after 98.0 days?
A .499 mol sample of graphite was heated with 2.16 mol oxygen gas to form carbon dioxide. Graphite is the limiting reagent in this reaction. Calculate the total moles of gas present after the reaction?
0.134 mole of KCl and 0.185 mole of CaCl2 were dissolved in water. calculate the total number of moles of Cl- ions in the solution.
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