01/07/21

If a cell combined 5 lactose molecules and 15 glucose molecules to make glycogen using dehydration synthesis, how many molecules of water would be generated?
If a cell combined 5 lactose molecules and 15 glucose molecules to make glycogen using dehydration synthesis, how many molecules of water would be generated?a,24  b. 25  c. 19  d. 20 
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08/23/20

Ideal gas law relations
Hi there!I have solved a question about the ideal gas law, and I wonder if anyone would please check if I answered it correctly.Thanks in advance.Question: A certain gas is in a pressure vessel... more
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07/25/20

What is the molar volume of He gas under the conditions of temperature and pressure where its density is 0.142 g/L?
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07/21/20

A sample of an iron chloride compound contained 69.97g of Fe and 111.11g of Cl ......
Suppose a second sample was found to contain 21.66g of Fe. Assuming the compound follows the law of definite proportions, then what mass of Cl would be present in this sample?
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07/21/20

State whether the following compounds are soluble or insoluble:

an explanation would be great as well:)
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07/21/20

You wish to make a 0.337 M nitric acid solution from a stock solution of 3.00 M nitric acid. How much concentrated acid must you add to obtain a total volume of 75.0 mL of the dilute solution?
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03/27/20

Chemistry question about basis of dilution
The fundamental basis of the dilution equation is the idea that ______________________ . the amount of solute stays constant. the amount of solvent stays constant the solute is soluble in any... more
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03/27/20

pH and equilibrium problems
Which of the following would be more soluble in an acid solution a) LiBr(s) or b) KNO3(s)?What is the pH of a saturated solution of Ni(OH)2(aq) at 25 degrees Celsius?What is true about the... more
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02/22/20

whats the running pressure in torr?
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals... more
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02/21/20

Titanium & silicon surfaces are irradiated with UV radiation with a wavelength of 250 nm. Which surface emits electrons with the longer wavelength?
ti- (Φ =6.94 x10-19)si-(Φ=7.24x10-19)
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02/15/20

Dimensional Analysis Problem Help
A recipe for making creamy pasta sauce calls for 0.750 liters of cream. Your measuring cup only measures in cups. How many cups of cream should you use?
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02/12/20

Titration mass procent
Hi!I had a lab on titration to calculate the concentration of acetic acid and from there calculate the mass procent of acetic acid in vinegar.But I have no idea how to calculate mass procent from... more
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02/11/20

Write the balanced equation for the neutralization reaction between H 2 SO 4 and KOH in aqueous solution. Phases are optional
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02/09/20

Consider the following electron configuration.
Consider the following electron configuration.(σ3s)2(σ3s*)2(σ3p)2(π3p)4(π3p*)4From this list, choose four species that, in theory, would have this electron... more
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02/05/20

Use the Conservation of Mass Interactive to answer the question
Consider the reaction.MnS(s)+2HCl(aq)⟶MnCl2(aq)+H2S(g)If the small amount of MnS is combined with the small amount of HCl, what is the mass of the products? The mass of any excess reactants will... more
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02/03/20

To what volume should 25 mL of 15 M nitric acid (HNO3) be diluted to prepare a 3.0 M solution?
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01/18/20

Calculating Density
Calculate the density g/ml of a solid if it has a mass of .0019kg and a volume of 0.00303 L
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01/12/20

You produce 3.6 mol CO2, how many moles CH4 were used?
CH4 + 2O2 —> CO2 + 2H2Opartial answer: 3.X mol CH4
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10/20/19

What is the theoretical yield and limiting reagent of the hydrolysis of Ethyl m-Toluate?

0.08203 mol NaOH and 0.971 mol HCl used
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09/05/19

Fusion of protium and tritium
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09/04/19

How much of each do we add? - DNA Extraction Buffer
We are given: 50 mls of DNA extraction buffer2% SDS,   100mM tris pH 8,     10mM EDTA,    and proteinase K [1 ug/ml] How much of each do we add?
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07/17/19

Which compound reacts faster in the Cannizzaro Reaction?
> Which reacts faster in the Cannizzaro Reaction? >a) $\\ce{OHC-C6H4-NO2}$ b) $\\ce{OHC-C6H4-OCH3}$ Obviously, a better hydride releasing group will react faster. Therefore my answer was... more
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07/17/19

Does the dipole moment increase or decrease by increasing the bond length?
It is established the dipole moment is a result of multiplication of the magnitude of charges (Q) and the distance between them (r). What I understand is that when an electron and a proton get... more
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07/17/19

Why is 2-methylpropene less in energy than its alkene counterparts?
Other isomers include 1-butene, cis 2-butene, and trans 2-butene. Why would 2-methylpropene be less in energy if there is more steric hindrance?
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07/16/19

Explanation for the trends in nucleophilicity—Orbital interactions or electrostatic attraction?
The trend of halide nucleophilicity in polar protic solvents is $$\\ce{I- > Br- > Cl- > F-}$$ The reasons given by Solomons and Fryhle<sup>\\[1\\]</sup>, and by... more
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