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How many molecules (not moles) of NH3 are produced from 2.73×10?4 of H2. Express your answer numerically as the number of molecules.
A water sample was found to contain [Ca2+]=35 mg/L and [Mg2+]=20 mg/L. Determine the water hardness in terms of mg/L CaCO3.and state whether it has low, medium or high hardness.
The solubility of oxygen in lakes high in the Rocky Mountains is affected by the altitude. If the solubility of O2 from the air is 2.67 × 10-4 M at sea level and 25°C.
The following solutions are mixed: 35.0 mL of 0.200 M Ca(OH)2 are mixed with 60.0 mL of 0.125 M HBr. What is the pH of the resulting solution. Assume additive volumes.
What would happen to the energy yeild of glycolysis if you replace all phophate with arsenate knowing that arsenate can be released by hydoplysis of any arsenate-containing compound formed.
Consider the reaction 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
Describe the use of light absorbing reagents in amino acid chromatography. What are these reagents used for? Name two reagents that are commonly used and describe how they react with amino acids.
What is the molar enthalpy of solid sodium hydroxide reacts with an aqueous solution of hydrochloric acid, forming water amd an aqueous solution of sodium chloride?
If 2.50 g of glucose (C6H12O6) are dissolved in 1.00 x 102 mL of solution, calculate the molarity of the glucose solution.
Calculate the average formal charge on an oxygen atom in the structure of the phosphate ion that minimizes formal charges, such as demonstrated in Part A.
If I burn 0.315 moles of hexane (C6H14) in a bomb calorimeter containing 5.65 liters of water, what's the molar heat of combustion of hexane is the water temperature rises 55.4 ºC? The heat capacity of water is 4.184 J/g ºC .
Use the wattage of the lightbulb and the time it is on to calculate the change in energy in joules. (assume that the cylinder and lightbulb assembly is the system and assume two significant figures).
Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.080 M NaOH: (a) hydrobromic acid (HBr), (b) chlorous acid (HClO2), (c) benzoic acid (C6H5COOH)
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