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What is covalent bonding? why is it different from ionic bonds?
electron affinities usually become more negative from left to right across a period but n is an exception. explain with
Compute the molarity of the final solution of Erythrocin B (MW 879.9 g/mol) if a .5028g sample is dissolved in water diluted to 100mL in a volumetric flask Solution 1, as well as then a 5mL aliquot of the stock solution is diluted to 100mL utilizi..
Problem- The concentration of copper (II) sulfate in one brand of soluble plant fertilizer is 0.070% by weight. If a 21.0g sample of this fertilizer is dissolved in 2.0 L of solution, what is the molar concentration of Cu2+
one hundred grams of water is saturated with NH4CLat 50 degrees C. According to table G, if the temperature is lowered to 10 degrees , what is the total amount of NH4CL that will precipitate?
An ideal gas in a sealed container has an initial volume of 2.25 L. At constant pressure, it is cooled to 21.00C where its final volume is 1.70 L. What was the initial temperature
You have samples of approximately 8mL solution with ph ranging from 4 to 10. Calculate the volume of 1M HCIO4 needed to lower the ph to 2.5.
Consider 4.00 rm L of a gas at 365 rm mmHg and 20. rm ^{circ}C . If the container is compressed to 3.00 rm L and the temperature is increased to 36, rm ^{circ}C, what is the new pressure, P_2, inside the container? Assume no change in the amount o..
What is the percentage by mass of CH4 in the mixture. The standard enthalpies of combustion for CH4 and C2H6 are -890.3 kJ mol-1 and -1569.7 kJ mol-1, respectively.
question exactly one milliliter of palmatic-b acid is thrown into a lake. the solution is is undiluted. it spreads out
If you use a liter ( 1000mL) bottle of oil in your engine, how much heat is produced in kcal? In BTU? The density of motor oil is .82g/mL
Problem- In terms of oxidation-reduction, what happens to the starting chromium ion of Cr+6 when it becomes Cr+3. Is this true for all oxidizing agents
Which of the following ideal aqueous solutions would be predicted to have the highest vapor pressure
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