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When 9 mL of a solution containing 1.53 M Na3PO4 is diluted to 36 mL, a dilute solution is formed. How many moles of Na+ ions are contained in 18 mL of the dilute solution?
The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 63 s for the gas to effuse, whereas nitrogen gas required 48 s. The molar mass of the gas is
A 122 piece of metal is heated to 285 and dropped into 84.0 of water at 26. If the final temperature of the water and metal is 58.3, what is the specific heat of the metal.
The baloon rises to an altitude of 20,000 m, where atmospheric pressure is 67 mmHg and the temp is 210 K. What is the volume of the balloon at 20,000 m
List all the covalent and non-covalent interactions that exist between amino acid residues in a polypeptide (besides the peptide bonds).
Manganese (Mn) is a transition element essential for the growth of bones. What is the mass in grams of 1.93 multiplied by 1021 Mn atoms, the number found in 6.00 kg of bone.
Hydrogenation of carbon double bonds C=C (i.e. adding a hydrogen on each carbon atom and thus reducing the double bond into a single bond: H-C-C-H) is a very common process in organic and polymer chemistry
One of the most common causes of inaccurate melting points is too rapid heating of the melting point apparatus near Tmelt. Under these circumstances, how will the observed melting point compare to the true melting point
Five hundred liters of a gas are cooled from 20°C to 10°C while the pressure remains constant.what the new volume will be?
Calculate the cell potential (emf) for a galvanic cell at 298 K composed of a standard aluminum electrode (Al metal and Al 3+ ions at 1.0 M) and a standard cadmium electrode (Cd metal and Cd 2+ ions at 1.0 M.)
What is the hybridization or what atomic orbitals are used by nitrogen in ammonia?
What is the pH of a buffer that results when .60mol NaF is mixed with 100ml of 2.0M HCl and diluted with water to a final volume of 250 ml? (Ka of HF=7.2e-4)
a corrosion technologist pipetted a 100.00 ml hard water sample and titrated it with 37.64 ml of 0.01 m edta solution
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