1,698 Answered Questions for the topic biochemistry

Biochemistry Chemistry Chem

05/12/21

Consider a 7% starch solution and a 2% starcg solution separated by a semipermiable membrane. Which process will occur?
A) water will flow from 2% into 7% starch solutionB) water will flow in both direction C) all of these will occurD) water will flow from 7% into 2% starch solution
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Biochemistry Chemistry Chem

05/12/21

A solution has OH- concentration as 1.0 x 10^-3. pH of this solution is:
A) 11B) 10C) -11D) 9
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05/12/21

*Which of the following pairs of conditions are needed to construct a similar cell that generates the highest cell potential?
Fe2+(aq)+Zn(s)→Fe(s)+Zn2+(aq)E°cell=+0.32VA galvanic cell generates a cell potential of +0.32V when operated under standard conditions according to the reaction above. Which of the following pairs... more
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05/11/21

STOICHIOMETRY - what is the PERCENTAGE YIELD OF ASPIRIN?

Density of Acetic Acid = 1.082 g/mlMass of Salicylic Acid = 5.102 gVolume of Acetic anhydride = 10.00 mlMass of filter paper = 0.0654 gMass of watch glass = 8.677 gMass of filter paper, watchglass... more
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Biochemistry Science English Biology

05/11/21

for help in biology chemistry biochemistry zoology botany microbiology Contact 03043535992

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05/11/21

What is the percentage yield of aspirin? (STOICHIOMETRY)
Density of Acetic Acid = 1.082 g/mlMass of Salicylic Acid = 5.102 gVolume of Acetic anhydride = 10.00 mlMass of filter paper = 0.0654 g Mass of watch glass = 8.677 gMass of filter paper,... more
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Biochemistry Biology

05/11/21

Biochemistry regarding TCA, glycolysis cycle etc in bacteria
A new variant of the laboratory strain E. coli has been isolated and requires oxygen for growth. You want to determine what metabolic pathways are active in this organism. It does not accumulate... more
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Biochemistry Chemistry Ap Chemistry

05/10/21

need help chemistry

1/ How would the wavelength in the image below change if the temperature was changed to 3800?2/What is the range of wavelengths for the visible spectrum?the picture is in this link :... more
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Biochemistry Chemistry Ap Chemistry

05/10/21

Need help chemistry its urgent

1/  put the following in order from lowest to highest frequency?microwaves, x-rays, radiowaves2/ Which of the objects in the image below emits radiation with a wavelength of approximately .01m?the... more
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Biochemistry Chemistry

05/10/21

Amino acids at different pH
How do I know how amino acids look like using only the Ip and pH-value (without pKa)For example: Draw lysine at pH 9.5 The Ip of lysine is 9.7I feel like I can't do it without the pKas :(
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Biochemistry Chemistry

05/10/21

need help chemistry its urgent !!

1/  put the following in order from lowest to highest frequency?microwaves, x-rays, radiowaves2/ Which of the objects in the image below emits radiation with a wavelength of approximately .01m? the... more
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Biochemistry Chemistry

05/09/21

help with chemistry plz

1 -Calculate the molarity (M) of a solution that contains 1.5 grams of KOH and has a volume of 2.0 L.2-How many grams of H2SO4 are needed to prepare 5.0 L of a 2 M H2SO4 solution?
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05/09/21

Help with chemistry questions plz

1-Calculate the mass in grams, in 2.28 mol of H2SO4.2-Calculate the number of moles in 144 g of P.3-Calculate the number of moles in 11.0 grams of NaOH4-Calculate the moles of Iron (Fe) in 3.8 x... more
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Biochemistry Math Science Chemistry

05/07/21

Molar mass question3
CuCl2 + 2NaNO3 --> Cu(NO3)2 + 2NaCl15.0 grams of copper (ii) chloride react with 20.0 grams of sodium nitrate. (Using NaCl as the product)Find the Limiting reagent & the theoretical yield of... more
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Biochemistry Math Science Chemistry

05/07/21

Molar mass question2
How many liters of water are formed from 55 L of oxygenC6H12O6 + 6O2 --> 6CO2 + 6H2O(Answer needs 2SF)
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Biochemistry Chemistry

05/07/21

need help with chemistry its urgent
1- How many atoms of Chlorine are in 2.00 mol of NaCl?2- How many grams of NaOH are needed to prepare 2.0 L of a 1.5 M NaOH solution?
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Biochemistry Chemistry

05/07/21

Solubility of polysaccharides in water
Why is cellulose insoluble in water, while starch is more soluble (however not perfectly)?I thought that since cellulose was a straighter molecule and starch more curved, it should make sense that... more
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05/06/21

WORKSHEET stoic

____ CH4+___O2---->____CO2+____H2O1)How many moles of oxygen gas are needed to produce 2.14 moles of water? Anewer ____ mol2) How many moles of oxygen can be formed from 67 grams of carbon... more
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Biochemistry Science Chemistry

05/06/21

SCIENCE HELP NEEDED!!

Can You physically remove the different parts of a compound ? Can you vary the amounts being used when creating a mixture ?
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Biochemistry Science Biology Chemistry

05/06/21

i need help! chemistry needed

What is the correct term to describe table salt which has a chemical formula of NaCl (Sodium Chloride)?An AtomA MoleculeAn ElementA Compound a compound right ?
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Biochemistry Science Biology Chemistry

05/06/21

chemistry I would appreciate it so much
__ P4O6 ---> ____ P4+_____ P2O41) How many moles of diphosphorus tetroxide are produced from 3.65 moles of tetraphosphorus hexoxide?Anewer ____ mol2) How many moles of tetraphosphorus hexoxide... more
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Biochemistry Science Chemistry

05/06/21

chemistry I would appreciate it so much

__ P4O6 ---> ____ P4+_____ P2O41) How many moles of diphosphorus tetroxide are produced from 3.65 moles of tetraphosphorus hexoxide?Anewer ____ mol2) How many moles of tetraphosphorus hexoxide... more
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Biochemistry Science Biology Chemistry

05/06/21

Practice Question #6 – Gram to Gram Mole Ratio Stoichiometry
1.     Copper I iodide, CuI, is not stable enough to last long in storage, so it is generally made just prior to use. In can be prepared from copper sulphate and hydriodic acid by the... more
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05/06/21

Practice Question #6 – Gram to Gram Mole Ratio Stoichiometry
1.     Copper I iodide, CuI, is not stable enough to last long in storage, so it is generally made just prior to use. In can be prepared from copper sulphate and hydriodic acid by the... more
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Biochemistry Science Chemistry Physics

05/06/21

Please I need this :) I would really love someone to help me

Copper I iodide , Cul , is not stable enough to last long in storage , so it is generally made just prior to use . In can be prepared from copper sulphate and hydriodic acid by the following... more
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