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What mass of NaCl must be dissolved in 65.0 grams of water to lower the freezing point by 7.50 °C? The freezing point depression constant, Kfp, for water is -1.86 °C/m
This is mixed in with water, but I can't find anything in my book showing examples of this. The following is what I need help with:
How much heat in joules is required to heat a 46 {rm g} sample of aluminum from 80 F to 146 F?
A certain organic compound was burned, producing 1.481 g of CO2 and 0.303 g of H2O. The mass of the original sample was 0.438 g. What is the empirical formula of the compound?
what weigh tof CaCO3 is required to completely react 135 ml of a 0.665M solution. Must show set up.
In the early days of the periodic table, the 1870s, both silicon and tin were known elements, but germanium was unknown. Using these trends and the densities of silicon and tin that you just obtained, estimate the density of germanium?
What mass of sodium nitrite must be added to 350 mL of water to give a solution with a pH
Predict the products of each of these reactions and write balanced molecular equations for each. If no reaction occurs
Given a balanced chemical equation and enthalpy of reaction, relate energy change to amount of reactant or product
an aluminum rod at 55.0 degrees celsius is put into 399 grams of water at an initial temperature of 20.0 degrees celsius. If the final temperature of water and rod are 30.0 degrees celsius, what was the mass of the aluminum rod?
a fishing boat accidentally spills 3.0 barrels of diesel oil into the ocean. each barrel contains 42 gallons. if the oil film on the ocean is 2.5 x 10^2nm thick , how many square meters will the oil slick cover?
Calculate the mole fraction of toluene in the solution that contains 48.0 g toluene and 139 g benzene.
Fluorine-18, which has a half-life of 110 min, is used in PET scans. (see section 4.5.) If 100 mg of fluorine-18 is shipped at 8 A.M., how many milligrams of the radioisotope are still active if the sample arrives at the radiology laboratory at 1:..
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