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15 Oct
2020

Question: Taking the pKa for acetic acid from the pKa ionization constant for weak…

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Question: Taking the pKa for acetic acid from the pKa ionization constant for weak acids (4.76), calculate how much solid sodium acetate ( in moles) must be added to a liter of 0.1 N acetic acid to produce a buffer solution of pH 4.50 (ignore the volume change).
what effect does raising the temperature of the reaction chamber at a constant pressure have on the following reaction at
what effect does raising the temperature of the reaction chamber at a constant pressure have on the following reaction at equilibrium?2NO2(g)
http://www.skincancer.org/prevention/uva-and-uvb/understanding-uva-and-uvbArticle Review:including a summary of the highlights of the article.Does the information from this article fill a void in the
http://www.skincancer.org/prevention/uva-and-uvb/understanding-uva-and-uvbArticle Review:including a summary of the highlights of the article.Does the information from this article fill a void in the existing literature? Does it contain breakthrough information? Will it cause others in the field to revise their ideas about the subject? Conversely, is it just a rehash of previously known information? Etcwhat is a UVA? UVB?Whogetsskincancer?Whatcausesskincancer?Whatarethetypesofskincancer?Whatarethesymptoms/signsofskincancer?Howareskincancerdiagnosed?Howareskincancertreated?Howareskincancerprevented?Is it well written? Clear? Complete or missing important information? Is more research on the topic needed?explain how this article will help you in your everyday well-being or your studies or future career, or how this article relates to the content of the course. (Course is Chemistry)
what is the frequency of light with a wavelength of 550 nm (1nm = 10^-9)? The speed of light is
what is the frequency of light with a wavelength of 550 nm (1nm = 10^-9)? The speed of light is 3.00 x 10^8 m/s a. 5.5 x 10^14 s^-1b. 1.8 x 10^-15 s^-1c. 165 s^-1d. 5.5 x 10^5 s^-1What is the energy of a photon with a frequency of 1.0 x 10^14 s^-1? Planck’s constant is 6.626 x 10 ^-34 J times sa. 6.6 x 10^-48 Jb.1.5 x 10^47 Jc. 6.6 x 10 ^-20 J
Administration of digitalis, a drug used to control atrial fibrillation in heart patients, must be carefully controlled because even a
Chemistry Assignment Writing ServiceAdministration of digitalis, a drug used to control atrial fibrillation in heart patients, must be carefully controlled because even a modest overdosage can be fatal. To take differences between patients into account, drug dosages are prescribed in terms of mg/kg body weight. Thus, a child and an adult differ greatly in weight, but both receive the same dosage per kilogram of body weight. At a dosage of 21μg/kg body weight, how many milligrams of digitalis should a 150 lb patient receive?
You are given a mixture of CuCO3 and CuO. You place the mixture in a crucible and heat it to
You are given a mixture of CuCO3 and CuO. You place the mixture in a crucible and heat it to decompose the CuCO3 into CO2 gas and CuO. You made sure that the CuCO3 had completely decomposed by constantly heating it, cooling it, and weighing it until the mass remains the same.Using the data below from the experiment, calculate the % CuCO3 in the original sample.Mass of empty crucible: 22.111 gMass of crucible sample before heating: 23.186 gMass of crucible sample at constant mass: 22.863 gUse proper sig figs. Assume that all of the given values have 3 digits after the decimal
The concentration of the car exhaust fume nitrous oxide, NO2 per meter.12Round your answer to the nearest integer. , in
The concentration of the car exhaust fume nitrous oxide, NO2 per meter.12Round your answer to the nearest integer. , in the air near a busy road is a function of distance from the road. The concentration decays exponentially at a continuous rate of 2.54% At what distance from the road is the concentration of NO half what it is on the road?At ( ) meters from the road the concentration of NO2 in the air is half the concentration on the road.At what distance from the road is the concentration of NO2 70% of what it is on the road? ( )At ( ) meters from the road the concentration of NO2 in the air is 70% of the concentration on the road.
A meteorogical balloon is filled with air to a radius of 1.0 m at sea level (where pressure is 1
A meteorogical balloon is filled with air to a radius of 1.0 m at sea level (where pressure is 1 atm and temperature is 20°C) and sealed. The balloon rises to an altitude at which the temperature is -30°C and its radius has expanded to 3.0 m. What is the pressure inside the balloon at this altitude?
Extend your thinking: The Gizmo enables you to examine ionsShow ionClA. , or atoms that have gained or lost electrons.
Extend your thinking: The Gizmo enables you to examine ionsShow ionClA. , or atoms that have gained or lost electrons. Select Na and turn on . Compare the radius of the neutral atom to that of the ion. Repeat with . Then look at other ions. See if you can find a pattern.Why do you think the Na ion is smaller than a neutral Na atom?B.Why do you think the Cl- ion is larger than a neutral Cl atom? can u help me on this???
. Make a graph of ln kusing excel and can you share the link of the excel. as a function
. Make a graph of ln kusing excel and can you share the link of the excel. as a function of 1/T using the data from mixtures with varied temperatures (which all had the same reagent composition). use the scatter mode and then add a linear regression trend line- be sure to and the R2 value on the graph

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