08/24/22

For each of the following compounds, Draw the Lewis structure of a compound with clarity and accuracy...
For each of the following compounds,Draw the Lewis structure of a compound with clarity and accuracy Determine if a chemical bond is either non-polar, polar, or ionic with clarity and accuracy... more
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08/24/22

Bio - Chemistry Question
Dear experts,I would like to receive help in distinguishing the monosaccharides so i can answer this question:Which of these substances is a monosaccharide?0 Maltose0 Amylose0 Sucrose0 Galactose0... more
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08/24/22

Balance the redox reaction
HNO3- + H2S → NO + S + H2O
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08/23/22

Physics & Chemistry Question...
Dear experts,Im having trouble answering the following question:How many calories (cal) does it take to bring 80liters of water from 20 ° C to 80 ° C?0 4800 kcal0 1.5 kcal0 1600 cal0 3200 kcal0... more
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08/22/22

Chemistry Question
Laws that were passed in some states in the country define a drunk driver as one who drives with a blood alcohol level of 0.10% by mass or higher. The level of alcohol can be determined by... more
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08/19/22

Is there a way to calculate the rate of a reaction, purely from the time and temperature?

In chemistry, we are required to calculate the rate of reaction for an assignment. Last year, this was calculated using the effect concentration has on the reaction but this year the focus is on... more
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08/18/22

the doctor orders 20 mg of dermol. on hand are 5mg tablets, how many tablet will be given for a day period
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08/16/22

How to determine enthalpy

Insrant hot packs works by crystallizing sodium acetate (NaCH3COO). The molar enthalpy of crystallization for sodium is -56.7kj/mol. How many grams of sodium acetate are needed to warm 125.0mL of... more
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08/16/22

reaction between Sodium thio sulfate and Sodium hypochlorite in water
Hi,If we have a water tank that contains 45000 Liters of water and you add Sodium hypochlorite 12% and the free chlorine in the tank is around 50 ppm, to neutralize we add Sodium thio sulfate to... more
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08/15/22

Balance the redox equation below in acidic solution.

[a] H+ + [b] ClO31- + [c] Cl1- → [d] Cl2 + [e] ClO2 + [f] H2Othe answers are: 4, 2, 2, 1, 2, 2 respectively.Having trouble balancing the electrons to get to the answer.
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08/13/22

If a woman breathes in air at 22.0 C with a total barometric pressure of 0.97 atm and warms to her core temp. of 37.6 C, what is the partial pressure of the 3 components of air in her lungs?
Air is approximately 78% nitrogen, 21% oxygen, and 1% argon (note that unless stated explicitly, gas concentrations are always expressed in terms of partial pressures (or mole fractions), so a gas... more
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08/13/22

What is the difference in blood oxygen concentration between a person at sea level where the air pressure is 1.0 atm and the top of K2, where the total air pressure is 34.7 kPa?
(You can assume the mole fraction of oxygen in air remains constant at 0.21 (or 21% of the total air pressure is oxygen), the temperature is 37 C, and that the solubility of oxygen in blood at 37 C... more
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08/13/22

Which of the following substances will form electrolytes and which will form molecular solutions when dissolved in water?

Chromium (II) nitrate: Cr(NO3)2  1-propanone: CH3CH2CHO  Trisodium citrate: Na3C6H5O7  Ammonium chloride: NH4Cl  
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08/13/22

The highest recorded surface pressure in N. America was at Dawson Creek, Yukon Territory, Canada in 1989 of 1079.6 millibar. What was this atmospheric pressure in mmHg and pascals?
World and U.S. Anti-cyclonic (High Barometric) Pressure Records | Weather Extremes (wunderground.com)
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08/13/22

What is [H3O+] and the pH of a solution of 0.052 M HNO2 and 0.041 M KNO2? Hint: This is a buffer.

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08/12/22

at 603K, Kc for the reaction NH4Cl(g) ==> NH3(g) + HCl(g) is 1.1X10^(-2). what is the equilibrium concentration of NH3(g) if 6the initial concentration of NH4Cl(g) is 0.500M

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08/09/22

the question is in the description

Unit 6 Quiz1. Most people are capable of showing different conflict styles depending on the situation.FalseTrue2. Alonzo is the head of his department. He wants to improve the amount of accidental... more
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08/09/22

Given initial rates data, what is the rate law? What is the rate constant?
Trial 1: [A] = 0.3 M, [B] = 0.3 M, [C] = 0.3 M, rate = 9.0 x 10^-5 M/sTrial 2: [A] = 0.3 M, [B] = 0.3 M, [C] = 0.9 M, rate = 2.7 x 10^-4 M/sTrial 3: [A] = 0.6 M, [B] = 0.3 M, [C] = 0.3 M, rate =... more
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08/08/22

You need to make 250 ml of a 20% solution. In stock you have 30% solution. How much sterile water do you use for this preparation?
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08/08/22

rеасtіоn: РСl5(g)↔ ​РСl3(g) ​+ ​Сl2(g)
Fоr ​thе ​rеасtіоn ​РСl5(g)↔ ​РСl3(g) ​+ ​Сl2(g). ​Ѕuffісіеnt ​РСl5 ​іѕ ​рut ​іntо ​а ​rеасtіоn ​vеѕѕеl ​tо ​gіvе ​аn ​іnіtіаl ​рrеѕѕurе ​оf 4.15 ​аtm ​аt ​250ºС. ​Аt ​еquіlіbrіum ​thе ​раrtіаl ​рr... more
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08/08/22

Can you give an explanation of a sodium thiosulfate and hydrochloric acid solution?
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08/05/22

ph of the following chp 10

What is the pHpH of a solution prepared by dissolving 3.40 gg Ca(OH)2Ca(OH)2 in water to make 815 mLmL of solution?how many moles of HNO3HNO3 are present if 8.60×10−2 molmol of Ba(OH)2Ba(OH)2 was... more
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08/05/22

chp 10 question below
the pH of question below [OH−][OH−]M_4 = 8.1×10−9 MM Express your answer using two decimal places.2. [OH−][OH−]M_1 = 2.2×10−7 MMExpress your answer using two decimal places.
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08/05/22

chp 9 question below
How many milliliters of 0.0210 MM Na2S2O3Na2S2O3 solution are needed to dissolve 0.640 gg of AgBrAgBr?AgBr(s)+2Na2S2O3(aq)→Na3Ag(S2O3)2(aq)+NaBr(aq)
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08/05/22

glass laboratory

A glass laboratory flask is filled with gas at 27 ∘C∘C and 0.94 atmatm pressure, sealed, and then heated to 97 ∘C∘C. What is the pressure inside the flask?Express your answer using two significant... more
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