04/09/19

Dosaage calculations
You receive you receive a new order for Amoxicillin for 75 mg q12 hours via G-tube when you look up the medication you find a safe dosage for Amoxicillin is 25 to 45 mg per kg per day your patient... more
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04/09/19

General chemistry class 121
 A lead cylinder (density=11.3 g/mL) is placed in a graduated cylinder that originally had a volume of water in it equal to 73.2 mL. After addition of the lead, the volume of the water in the... more
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04/09/19

Influence of alcohol on brain cells?
As far as I know, drinking alcohol is killing cells in the brain. But is it linear? E.g. if I have 1.0 per mil and it kills 1000 cells will 2.0 per mil kill 2000 cells?
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04/08/19

pH of Solutions
Describe which of these acids would be the strongest based on the following data:Chemical Formula: Name: Kc1: Kc2:H2C3H2O4 Malonic Acid 1.5×10−3 2.0×10−6H2C2O4 Oxalic... more
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04/08/19

pH of Solutions
Calculate the pH of a 4.0 M HC2H3O2 solution. Ka= 1.8 x 10^10-5
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04/08/19

How exactly do sulfites prevent oxidation of wine?
I know that sulfites are used in wines to prevent oxidation, but how exactly does this happen, which reactions take place and where do the products go?
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04/08/19

Chemistry Question
Consider the neutralization reaction 2HNO3 (aq)+Ba(OH)2 (aq)------>2H2O(l)+Ba(NO3)2(aq). A 0.115-L sample of an unknown HNO3 solution required 41.9 mL of 0.150 M Ba(OH)2 for complete... more
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04/08/19

At which points would the concentration of H2 lie on this graph:
After a 2.0 mole sample of HI (g) is placed into an evacuated 1.0 L container at 700. K, the following reaction occurs: 2 HI(g) ↔ H2(g)  + I2(g)The concentration of HI(g) as a function of time is... more
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04/07/19

If i have two balloons. 1st balloon- 2 L of Hydrogen. 2nd balloon 2 L of Oxygen which balloon is heavier? or Are they the same ?
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04/07/19

Why have certain plants evolved to contain psychoactive compounds?
Plants such as marijuana (*Cannabis*) and kratom (*Mitragena speciosa*) contain compounds that affect the human brain. Why have these plants evolved to incorporate substances like THC and... more
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04/07/19

What is the significance of the small value of the ionization constant of water and how does it relate to the electrical conductivity of water?
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04/07/19

If a solution contains 0.0020 mol of CrO2−4 per liter and solid AgNO3 is added, what concentration of Ag+ ion must be reached to cause Ag2CrO4 to begin to precipitate? For Ag2CrO4, Ksp=9.0×10−12.
If a solution contains 0.0020 mol of CrO2−4 per liter and solid AgNO3 is added, what concentration of Ag+ ion must be reached to cause Ag2CrO4 to begin to precipitate? For Ag2CrO4, Ksp=9.0×10−12.
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04/07/19

For the following equilibrium, if Ksp=1.3×10−33, what is the molar solubility of aluminum hydroxide? Al(OH)3(s)↽−−⇀Al3+(aq)+3OH−(aq)
For the following equilibrium, if Ksp=1.3×10−33, what is the molar solubility of aluminum hydroxide?Al(OH)3(s)↽−−⇀Al3+(aq)+3OH−(aq)
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04/06/19

Thermodynamics Chemistry Combined Metals
A sheet of gold weighing 10.0 grams and at a temperature of 18.0 °C is placed flat on a sheet of iron weighing 30.0 grams at a temperature of 55.6 °C. What is the final temperature of the combined... more
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04/06/19

Equilibrium Questions
After a 2.0 mole sample of HI (g) is placed into an evacuated 1.0 L container at 700. K, the following reaction occurs: 2 HI(g) ↔ H2(g)  + I2(g)The concentration of HI(g) as a function of time is... more
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04/06/19

half-reaction method question
Answer the following questions and balance the equation below using the half-reaction methodClO3−(aq)  +  Cu(CN)2−(aq) →     Cu2+(aq)  +  CN−(aq)  +   Cl2(aq)    To balance the number of electrons,... more
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04/05/19

Predicting the qualitative acid-base properties of salts
Problem PageConsider the following data on some weak acids and weak bases:  acid Ka name formula hydrocyanic acid HCN ×4.910−10 nitrous... more
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04/05/19

How may calories are there per gram of candy?
A researcher studying the nutritional value of a new candy places a 5.20 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is ... more
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04/05/19

Give ss tsp po cf qid x 10d
Give one-half teaspoonful (2.5ml) by mouth with food four times daily for 10 days
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04/04/19

Growth and Decay Problem
After the release of radioactive material into the atmosphere from a nuclear power plant in a country in 1984, the hay in that country was contaminated by a radioactive isotope (half-life 5 days).... more
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04/04/19

Does CDCl3 also Knock People Out?
I know that chloroform can be used to make people unconscious, but would that also work with deuterated chloroform, $\\ce{CDCl3}$?My instinct is "yes", but I'm not sure I'm willing to try this... more
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04/04/19

What is the reason for the ionization and weakening of polyprotic acids?
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04/04/19

Why is ammonia a base in both the Bronsted-Lowry theory and Arrhenius theory?
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04/04/19

Help with question
How many liters of a 3.06 M K2SO4 solution are needed to provide 61.8 g of K2SO4(molar mass 174.01 g/mol)?
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04/04/19

For the reaction SO3 + H2O ® H2SO4, how many grams of sulfur trioxide are required to produce 3.78 mol of sulfuric acid?

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