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A mole of atoms, ions, molecules, or anything else contains Avogadro's number, 6.022 x 1023, of these units. A mole of ascorbic acid (vitamin C), C6H8O6, has a mass of 176.0 g. If you ingest a vitamin C tablet containing 4.5 x 1022 carbon atoms, what was the mass, in milligrams, of the tablet, assuming that the tablet is 100% pure?
a solution contains 55 grams of ascorbic acid in 250 g of water freezes at -2.34 degrees C. calculate the molar mass of the solute
A 6.11g sample of Cu-?Zn alloy reacts with excess aqueous HCl producing 1.26 L of H2(g) at 22.0 ?C and 728 torr. Since only the Zn portion of the alloy reacts, calculate the percent Cu in the alloy.
What is the equilibrium concentration of chloroacetic acid, HC2H2O2Cl, in a solution prepared by dissolving 0.0277 mol of HC2H2O2Cl in 1.00 L of water
What is the mass concentration of water vapor in the atmosphere at 25oC when the relative humidity is 60% and the saturation vapor pressure is 2800 Pa
Some aromatic compounds also undergo nucleophilic substitution, propose a mechanism for this reaction and indicate what types of substituents would be expected to be most reactive
Which electrode gains mass and which loses mass as the cell reaction proceeds? What is the equation for the equation for the overall cell reaction?
If a sample contains 79.0% of the R enantiomer and 21.0% of the S enantiomer, what is the enantiomeric excess mixture
What is the percent yield of a reaction in which 228. g phosphorus trichloride reacts with excess water to form 118 g HCl and aqueous phosphorus acid (H3PO3)?
What is the minimum uncertainty in the position of an electron, given that we know nothing about its speed except that it is less than the speed of light?
what would be the product if you reacted 1,3-dimethoxubenzene with tert-butyl alcohol?
Given K=6.45x10^5 for 2NO(g)+O2(g)=2NO(g) at 500K, what concentration of oxygen would be needed to maintain equilibrium in a system where NO and NO2 are known to be at equal concentrations.
Consider the following specific heats: copper, 0.384 J/g·?C; lead, 0.159 J/g·?C; water, 4.18J/g·?C; glass, 0.502J/g·?C. If the same amount of heat is added to identical masses of each of these substance
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