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Sugar (82.00 grams; molar mass 342.3 g/mol) was dissolved in water. The freezing point of the solution was determined to be -3.60 deg C. How many grams of water were used to make the solution? The freezing point depression constant Kf for water is -1.86 K/m. Enter the mass of water as an integer.
An aqueous solution is 22.0% by mass silver nitrate, AgNO3, and has a density of 1.22 g/mL. What is the molarity of silver nitrate in the solution?
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?
The % mass composition of 0.1458g sample of a compound was measured by burning the compound in an excess of oxygen.
The half-life of tritium (31H) is 12.3 years. If 47.0 mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the nuclide will remain after 24.6 years?What mass of the nuclide will remain after 98.4 years?
Determine the empirical formula of estradiol. The molecular weight of estradiol was later determined to be 272. Determine the molecular formula of estradiol.
Write the reaction and predict the major organic products(s) for each of the following reactions. Make sure to consider stereochemistry & regiochemistry, if applicable.
draw the Lewis structure with all bonds and lone pairs (b) indicate directions in all bond dipoles (c) indicate the molecular dipoles and (d) indicate the shape of each molecule.
Fe2O3(s) + 3CO(g)-> 2Fe(s) + 3CO2(g) Based on this equation, how many moles of carbon monoxide (CO) are needed to react completely with 1.75 moles of iron (lll) oxide (FeO3)??
if the density of carbon dioxide in air is .65mg/L, what volume is occupied by 25kg of carbon dioxide?
A sample of gas is confined to a cylinder housed with a movable piston. The gas occupies a volume of 1.8 L at 1.8 atm and 25°C. Calculate the volume of the gas sample if the pressure is increased to 8.6 atm at constant temperature.
In the laboratory, a student named Georgia weighed 5.05 grams of an unknown solid mixture containing benzoic acid, copper (II) sulfate and sand.
the third bulb has a volume of 30.0 mL and contains 4.96 atm of hydrogen. If the stopcocks (valves) that isolate all three bulbs are opened, what is the final pressure of the whole system in atm?
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