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Why is it an important concept that atoms generally appear in whole number molar ratios to each other in chemical compounds, and in general, would you expect that students would find this ratio to be lower or higher than the actual ratio
What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.518g/L at 25 ?C and 721
A piece of metal with a mass of 18.2 grams was dropped into a graduated cylinder containing 16.50mL of water. The graduated cylinder after the addition of the metal is 18.40. Determine the density of the metal.
How does a base, such as NaOH, help to catalyze the benzoin condensation when thiamine is present
If the enthalpy of combustion of the compound is -2978.0 kJ/mol and the temperature of the calorimeter rises from 25.44 C to 27.7 C, how many moles of the compound were oxidized?
The initial rate of a reaction 2A + 3B -> C + 2D was measured using different initial concentrations of A and B. Use the information in the table to determine the rate law for the reaction.
A piece of metal with mass of 147 g is placed in 50-mL graduated cylinder.The water level rises from 20mL to 41ml. what is the density of the metal?
calculate the [OH^-] of each aqueous solution with the following [H3O^+] at 25 degrees C: a)baking soda, 1.0x10^-8 M b)orange juice, 2.0x10^-4 M c)milk, 5.0x1-^-7 M d)bleach, 4.8x10^-12 M
Nickel is a transition element and has a variable valence.Using a nickel salt, 2 F (faradays) plate out 39.2 g ofnickel. What ions are in the solution of this salt? Atomic molar masss Ni = 58.7 g·mol-1
What is the hybridization of the nitrogen atom in sulfathiazole? Assuming that the sulfur atom is sp2-hybridized, how many -electrons are there in the sulfathiazole ring?
glycerol has a density of and a molecular weight of. If mL are mixed with a kg of water, what is a good estimate of the temperature at which this solution with freeze?
The densities of ice and water at 0 C are 0.9168 and 0.9998 respectively. if delta h for the fusion process at atmospheric pressure is 0.625 what is delta u.
A stock solution was prepared by dissolving exactly 0.4000 g of pure ASA (180.16 g/mol) in 10.00 mL of NaOH and heating the solution to a gentle boil.
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