02/15/17

Chemistry Problem
Some indoor air-purification systems work by converting a little of the oxygen in air to ozone, which kills mold and mildew spores and other biological air pollutants. The chemical equation... more
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02/15/17

Calculate the pressure of 4.61 x 10^ 22 molecules of CO gas mixed with 2.87 x 10^24 molecules of N2 gas in a 5.99 L container at 34.5°C.
How do i do this???
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02/13/17

How do you calculate delta[h2o2] using a reaction equation?
This is a "Kinetics of Hydrogen Peroxide Oxidation of Iodide" lab, and the table requires me to solve for ΔH2O2 using a chemical reaction equation. I do not know how, and I need that to compute the... more
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02/13/17

reaction of sodium hydroxide (NaOH) with m-toluic acid
 Write the relevant equation for the reaction of sodium hydroxide (NaOH) with m-toluic acid and state whether this component will be dissolved in diethyl ether or water?
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02/13/17

reaction of hydrochloric acid (HCl) with benzocaine
Write the relevant equation for the reaction of hydrochloric acid (HCl) with benzocaine and state whether this component will be dissolved in diethyl ether or water?
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02/10/17

1) How do hydrogen bonds contributes to the high melting and boiling points of water?
1) How do hydrogen bonds contributes to the high melting and boiling points of water?   2) What functional groups of biomolecules can form hydrogen bonds?   3) Describe what happens when a... more
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02/08/17

How do i solve a double replacement reaction?
Balance and then write the net ionic equation. I know that (aq) stands for dissolved water     NH4CL (aq) + Mg (OH)2 (aq) -> MgCl2 (aq) + NH3 (g) + H2O (l)
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02/08/17

Percent yield
How many grams of aluminum  would be produced if this reaction had a percent yield of 95% and you start with 9.73 grams of aluminum oxide reacton with an excess of carbon?
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02/05/17

How do I get the calorimetry constant from lab data?
https://i.stack.imgur.com/QjzTv.jpg    Constant should be around 30-85, i know it's mass x specific heat x delta t + mass x specific heat x delta t = 0 but I don't know how to make my equation... more
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02/02/17

what is the normal blood concentration o K
what is the normal blood concentration of K
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01/25/17

What is the molar mass of Neon rounded to the nearest whole number
What is the molar mass of Neon rounded to the nearest whole number
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01/05/17

calculate the volume of air in liters that are inhaled and exhale in an 8 hour working day.
Assume that each breath has a volume of about 0.5L, and that you are breathing 15 times a minute.
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01/05/17

Is there a way to calculate yourself the content of vitamin B12 of a food?
I really need to know if it's possible to calculate the amount of B12 existent in different foods, is it possible to calculate it myself? I can't just research it on the internet. 
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01/04/17

How many joules of hear are required to raise the temperature of 550g of water from 12.0°C to 18.0°C
Solving for heat  (q) chemistry questions 
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12/15/16

Calculate the minimum mass of CaO to attain 21,900 joules.
Calculate the mininum mass of calcium oxide, CaO(s), that a student must use to attain the amount of heat of a 150.0 g sample of water from 25.0 degrees C to 60.0 degrees C. (I already calculated... more
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11/23/16

Calculating Enthalpy in a Calorimeter Experiment
When 25.0 mL of 1.0 M H2SO4 is added to 50.0mL of 1.0M of NaOH at 25.0 degrees C in a calorimeter, the temperature of the aqueous solution increases to 33.9 degrees C. Assuming that the specific... more
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11/21/16

Chem help plllleeeeeaaassseeee
Calculate the amount of heat needed to melt 96.1 g of ice (H20) and bring it to a temperature of 68.6 degrees Celsius. Round your answer to 3 significant digits. Also, be sure that your answer... more
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11/17/16

Titration Calculation?? PLEASE HELP!!
Suppose our unknown acid was acetic acid, CH3COOH (Ka = 1.8 x 10-5) and that your initial aqueous solution contained 0.100 mol of acetic acid in total volume of 100 mL.To this acetic acid solution... more
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11/14/16

Part 1) A solution containing 240 g of silver nitrate is combined with a solution containing 200 g of sodium chloride. predict the reaction and provide a balanc
(SOLVE USING STOICHIOMETRY)   List the compound, mass before reaction, and mass after reaction
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09/25/16

Chemistry Problem
A solution of 100.0 mL of 0.200 M KOH is mixed with a solution of 200.0 mL of 0.150 M NiSO4.(a) Write the balanced chemical equation for the reaction that occurs. (b) Identify the limiting... more
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09/25/16

AP Chemistry
Anexperiment calls for you to use 100 mL of 0.50 m hno3 solution. All you have is 3.6M HNO3. How would you prepare the desired solution?
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06/07/16

what's the slope of a line that is parallel to the line
y = 3/2x + 5
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03/09/16

CHEM 2 Solubility Equilibrium Question?? PLEASE HELP!?
Hi everyone. I have two questions that I think I found the answer to, but could you check and see if they are right? If they are incorrect, could you show me how you achieved the correct answer?... more
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10/12/15

How many milliliters of a stock solution of 5.00 M HNO3 would you have to use to prepare 0.120 L of 0.470 M HNO3?
How many milliliters of a stock solution of 5.00 M HNO3 would you have to use to prepare 0.120 L of 0.470 M HNO3 ?
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10/11/15

Chemistry Concentration question
Tin(II) ions react with periodate ions in acid medium to give iodide and tin (IV) ions. Twenty-five mL of a 0.250 M solution of tin(II) nitrate react with 45.00 mL of 0.100 M solution of sodium... more
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