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An impure sample of sodium chloride weighed 0.6825g. When dissolved in water and reacted with excess silver nitrate, AgNO3, 0.9855g of AgCl precipitated. What is the percentage of NaCl in the impure sample.
How many joules of heat are lost by 3473 kg granite as it cools from 41.1°C to -13.1°C?
evaporated the water from NaOH extracts prior to adding acid?
The heat of vaporization of water is 9.72 Kcal/mol. How much heat (in kilocalories) is required to vaporize 2.70 mol of H2O and how much heat (in kilocalories) is released when 440 grams of steam condenses
A mass of 1.20g of silver is plated from a silver nitrate solution in 1:25 hours. Calculate: a) couloumbs, b) faradays and c) amperes necessary for this process.
In order to induce the error in the precision and accuracy section ,a) would the balance be registering masses too low or too high?
Identify the following compound from its IR and proton NMR spectra. C6H10O: NMR: ? 3.31 (3H, s); ? 2.41 (1H, s); ? 1.43 (6H, s) IR: 2110, 3300 cm-1 (sharp)
A solution of ammonia and water contains 4.50×1025 water molecules and 5.30×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 9.80 solution.
a student placed 17.5 g of glucose in a volumetric flask added enough water to dissolve the glucose by swirling then
How many minutes does it take light from the sun to reach earth?(The distance from the sun to earth is 93 million mi;the speed of light is 3.00*10^8 m/s.)
A compound with the molecular weight of 391.98 was determined to be 3.1% Hydrogen, 31.5% Phosphorous, and 65.4% Oxygen. Determine the empirical formula and the molecular formula for the compound.
A hypothetical reaction X + 2Y ® Products is found to be first order in X and second order in Y. What are the units of k, the specific rate constant, if reaction rate is expressed in units of moles per liter per second? A) M•s-1 B) M-2•s-1 C) M-3•..
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