1,698 Answered Questions for the topic biochemistry

02/24/21

Chemistry: Mechanisms
The following mechanism has been proposed for the gas phase reaction of nitrogen monoxide with bromine......step 1.....fast:......NO + Br2  NOBr2.....step 2.....slow:....NOBr2 + NO  2 NOBr(1) What... more
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02/24/21

Chemistry: Mechanisms
The following mechanism has been proposed for the conversion of tert-butyl bromide to tert-butyl alcohol in aqueous solution:step 1  slow:  (CH3)3CBr  (CH3)3C+ + Br-step 2  fast:   (CH3)3C+ +... more
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02/24/21

Chemistry: Mechanisms
The decomposition of hydrogen peroxide in the presence of potassium iodide is believed to occur by the following mechanism:step 1  slow:  H2O2 + I-  H2O + OI-step 2  fast:   H2O2 + OI-  H2O + O2 +... more
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02/24/21

Arrhenius Equation
The activation energy for the gas phase isomerization of cis-cyanostyrene is 193 kJ.cis-C6H5CH=CHCNtrans-C6H5CH=CHCNThe rate constant at 672 K is 3.87×10-4 /s. The rate constant will... more
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Biochemistry Chemistry Chem

02/22/21

Which of the solutions (A, B, or C) will have the highest freezing point?
Consider the following four solutions:(A) 0.175 moles of KClKClin 1.250 kg of water (B) 0.175 moles of C6H12O6C6​H12​O6​(glucose) in 0.750 kg of water (C) 0.075 moles of Ca(NO3)2Ca(NO3​)2​in 0.950... more
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Biochemistry Biology Microbiology

02/21/21

General Biology
You receive a bacteria culture from a hospital and are asked to figure out which bacteria are present in the culture. You find that there is peptidoglycan in the culture and lipopolysaccharides.... more
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Biochemistry Biology Microbiology

02/21/21

General Biology
you want to discover how much a heat a DNA strand can withstand before denaturing. Youdecide to heat DNA in a beaker and measure the amount of DNA content throughout. At the beginning the DNA... more
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Biochemistry Biology Chemistry

02/21/21

General Biology
you need to make a solution of NaOH in the lab. You decide to make your solution with 12 g of NaOH in 900 ml of water. You find your solution to have a pH of 10.00, what is the molarity of the... more
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02/20/21

What is the difference in development of natural products as a pure, well-defined substances and as a complex extract. 
Any differences in determining the dose between an extract and a pure substance? Why could it differ in an extract?
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02/19/21

Integrated Rate Laws
The decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °CH2O2(aq)H2O(l) + ½ O2(g)is first order in H2O2 with a rate constant of 1.10×10-3 min-1.If the initial concentration... more
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02/19/21

Integrated Rate Law
The gas phase decomposition of hydrogen peroxide at 400 °CH2O2(g)H2O(g) + ½ O2(g)is second order in H2O2.In one experiment, when the initial concentration of H2O2 was 8.60×10-2 M, the concentration... more
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02/19/21

Integrated Rate Law
The gas phase decomposition of sulfuryl chloride at 600 KSO2Cl2(g)  SO2(g) + Cl2(g)is first order in SO2Cl2 with a rate constant of 2.80×10-3 min-1.If the initial concentration... more
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02/19/21

Integrated Rate Law
The decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °CH2O2(aq)H2O(l) + ½ O2(g)is first order in H2O2.During one experiment it was found that when the initial concentration... more
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02/19/21

Integrated Rate Law
The decomposition of nitrous oxide at 565 °CN2O(g)N2(g) + ½ O2(g)is second order in N2O with a rate constant of 1.10×10-3 M-1 s-1.If the initial concentration of N2O is 1.67 M, the concentration... more
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02/18/21

Integrated rate law
The gas phase decomposition of hydrogen iodide at 700 KHI(g)½ H2(g) + ½ I2(g)is second order in HI with a rate constant of 1.20×10-3 M-1 s-1.If the initial concentration of HI is 1.06 M, the... more
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02/18/21

Integrated rate law
The following initial rate data are for the reaction of tertiary butyl bromide with hydroxide ion at 55 oC:(CH3)3CBr + OH-  (CH3)3COH + Br- Experiment [(CH3)3CBr]o, M [OH-]o, M Initial Rate,... more
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02/18/21

Integrated rate law
The following initial rate data are for the oxidation of arsenate ion by cerium(IV) ion in aqueous solution:AsO33- + 2 Ce4+ + H2OAsO43- + 2 Ce3+ + 2 H+ Experiment [AsO33-]o, M [Ce4+]o,... more
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Biochemistry Biology Microbiology

02/18/21

What's the role of actine outside the cytoskeleton?
What's the role of actine outside the cytoskeleton?
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Biochemistry Biology Microbiology

02/16/21

Biology Calculating Molarity
How do you calculate the molarity of hydrogen and hydroxyl ions in an aqueous solution?
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02/14/21

What are chemical bonds?
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Biochemistry Biology

02/12/21

Wat are the significance of dna and rna?

Wat are the significance of dna and rna in molecular biology research, cellular physiology and in diseases
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Biochemistry Chemistry Chem Ap Chem

02/09/21

2 moles of Sodium sulfate is reacted with 3 moles of calcium chloride.  
2 moles of Sodium sulfate is reacted with 3 moles of calcium chloride.   Write a balanced chemical equation, including states of all reactants and products. Write a net ionic equation. Determine... more
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Biochemistry Math Algebra 1 Algebra 2

02/09/21

Which of the following statements is TRUE?
The different isotopes of an element are always equally abundant. Atoms of different elements may have the same mass numbers. The identify of an atom cannot be determined solely by its atomic... more
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Biochemistry

02/07/21

Calculate the mass
Calculate the mass in mg of kanamycin required to make 25 mL of a 12 mg/mL solution of kanamycin.
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02/07/21

General Chemistry
What is the final sodium ion concentration when 35.0 ml of 0.150 M NaCl is mixed with 75.0 of 0.050 M Na2SO4 and 20.0 ml of 0.100 M KCI?
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