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55.0 calories of heat are added to a small lead block. If the temperature of the lead increases from 27.0°C to 59.2°C, what must be the mass of the lead block?
If a 1,2-diol is subjected to a periodic acid test, a white solid will form when silver nitrate is added. What is the identity of the white solid?
The wavelength of maximum absorbance is solvent dependent. in water, the wavelength of maximum absorbance is 453 nm.
What mass of carbon dioxide is present in 1.00m^3 of dry air at a temperature of 25c and a pressure of 731torr? Calculate the mass percentage of oxygen in dry air.
How much heat energy, in kilojoules, is required to convert 73.0 g of ice at -18.0 0C to water at 25.0 0C ?
use curved arrows to show the flow of electrons in each step, and note any relevant charges or lone pairs of electrons.
calculate the mass of hydrogen gas that could have been produced. What would the gas volume be at room temperature and one atmosphere of pressure.
What are the respective concentrations (M) of Na and SO4 ions formed by dissolving 0.600 mol Na2SO4 in 135 mL water?
A 1.50L sample of neon gas at 1.10 atm and 25 degrees celsius is heated to 45 degrees celsius. The neon gas is then subjected to a pressure of 1.50 atm. Determine the new volume of the neon gas.
55.0 mL of a 1.70 M solution is diluted to a volume of 288 mL. A 144 mL portion of that solution is diluted using 181 mL of water. What is the final concentration?
a 4.0 g sample of iron was heated from 0 degrees celsius to 20 degrees celsius. it absorbed 35.2 j of heat. what is the specific heat of this piece of iron?
calculate the density of the pheromone in grams per liter in a cylindrical air space with a radius of 0.50 mi and a height of 40ft.
A mixture of NaCl and NaBr has a mass of 2.00 and is found to contain 0.78 of Na. What is the Mass of NaBr in the mixture.
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