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The purity of a substance will often affect the melting and boiling points. This is used by chemists to assess the purity of a product. How does the purity of the substance affect the melting and boiling points?
a sample of sodium hydrogencarbonate, NaHCO3 is contaminated with 5-10% NaCl. How should i carry out an experiment to determine the percentage purity of NaHCO3 ?
calculate the molarity of a solution of glycerol made by dissolving 68.000 glycerol at 15 in enough water to make
A 475 mL sample of gas is collected over water at 27°C and a total pressure of 675 mm Hg. If the vapor pressure of water at 27°C is 26.7 torr, what is the volume of the gas sample at standard pressure?
what particle or type of radiation needs to be included to balance the equation? 234Th ? ? + beta particle? Please explain why you chose your particular answer
considering the given chemical reactioncacn2 3h2o --gt caco3 2nh3 .determine how much ammonia would be formed if 187
The pressure exerted on a 240 mL sample of hydrogen gas at instant temperaure is increased from .428 ATM to.724 ATM. What will the final volume be for the sample be?
which of the following atoms with the specified electronic configuration would have the lowest first ionization energy? (a) (He)2s^2 2p^3 (b) (ne) 3s^2 3p^4 (c) [Xe]6s^1 (d) [Xe]6s^2 4f^14 5d^10 6p^1
Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. Which do you think will be the major product? Explain your reasoning
Problem- A 23.0 mL solution of 0.110 M CH3CHOOH is titrated with 0.200 M KOH solution. Calculate the pH after the following additions of the KOH Solution
An apparataus has three bulbs, a,b, and c. a has h2o, co2, and n2 with a pressure of 564 mmHg, Bulbs b and c are empty. bulb a is 25 degrees celcius, b is -70 celcius and c is -190 celcius. how many moles of h2o are in the system if the stopcock b..
A chemist required to produce 70200 kilograms of acetylsalicylic acid (C9H8O4). Explain how many liters of acetic anhydride are needed if the acetylsalicylic acid is produced with a 78.2% yield
calculate the weight and number average molecular weights as a function of conversion for the linear polycondensation
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