1,698 Answered Questions for the topic biochemistry

Biochemistry Math Algebra 2 Chemistry

04/09/21

how to solve for ratio? help needed

In the school cafeteria, 3 out of every 5 students buy a sandwhich for lunch. Which represents the ratio of students that buy a sandwhich to students who do not buy a sandwhich.2/5 right ?
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Biochemistry Math Science Biology

04/09/21

Calculate wavelength
Calculate the wavelength of: a.) an electron (9.10×10-31 kg) moving at a speed of 5.81×106 m/s (13000000 miles per hour).      b.) a baseball (0.140 kg) moving at a speed of 40.2 m/s... more
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Biochemistry Science Biology Ecology

04/08/21

How can we prevent the earth's average temperature from rising by more than 2 ° C to 2100?

someone explain in detail?
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04/08/21

Predict the sign of ΔS for the following reactions. Then predict whether the reaction is spontaneous, non-spontaneous, or dependent on the magnitude of ΔH, ΔS and temperature.

a.) Na2CO3 (s) Na2O (s) + CO2 (g) (endothermic) b.) 2NF3 (l) N2 (g) + 3F2(g) (exothermic) c.) 2XeO3 (s) 2Xe (g) + 3O2(g) (exothermic)
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Biochemistry Biology Chemistry

04/08/21

Catalyzes and the mechanism of action of the enzyme

show the reaction that catalyzes and the mechanism of action of the enzyme glyceraldehyde-3-phosphate dehydrogenase.What metabolic pathway does this reaction belong to?
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Biochemistry Math Science Biology

04/08/21

Bohr model calculations
Calculate the energy of an electron in the n = 3 level of a hydrogen atom.
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Biochemistry Math Science Biology

04/08/21

Bohr model calculations
Calculate the energy for the transition of an electron from the n = 8 level to the n = 7 level of a hydrogen atom.E =  ???JoulesIs this an absorption or an emission process?____???_____
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Biochemistry Algebra 1 Algebra 2 Biology

04/08/21

Confused and needing Help with a goof explanation so I understand this better PLEASE

KY.6.EE.9 *1 point
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Biochemistry Algebra 1 Algebra 2 Biology

04/08/21

Confused and needing Help with a goof explanation so I understand this better PLEASE

KY.6.EE.9 *1 point
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Biochemistry Chemistry

04/07/21

please help with honors chemistry

please help me with chemistry. i am having trouble with the net ionic. but please do the whole thig so i can check my answers. thank you so very much. i really appreciate it. change the word... more
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Biochemistry Math Algebra 2 Chemistry

04/07/21

can someone explain what am suppose to do?

1.An Exercise class is 90 minutes long. How many seconds are in these 90 minutes ? 2.A display of book at a library has 6 fiction books for every 2 nonfriction books how many books are displayed... more
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04/07/21

Precipitation: Q vs K, Calculate
When 12.0 mL of a 1.73×10-4 M sodium hydroxide solution is combined with 15.0 mL of a 3.79×10-4 M cobalt(II) bromide solution does a precipitate form? (yes or no)For these conditions the Reaction... more
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04/07/21

Need help before April 10th! Please and thank you!
___C6H6+ ___Cl2→ ___C6H5Cl + ___HClWhen 39.0 g of C6H6reacts with an excess of Cl2, the actual yield of C6H5Cl is 42.0 g. What is the percent yield of C6H5Cl?
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04/06/21

Climate change Solutions

How can we prevent the earth's average temperature from rising by more than 2 ° C to 2100? Any detailed answer would be much appreciated!
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Biochemistry Math Science Biology

04/05/21

Ethalpy reactions
The following reaction is endothermic. MgCl2(s) Mg(s) + Cl2(g)    ΔH(1) = 641 kJ Calculate the enthalpy change for the reaction of the elements to form one mole... more
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Biochemistry Math Science Biology

04/05/21

Calculate enthalpy change
Given the following two reactions:(1)Pb(s) + Cl2(g)PbCl2(s)     H(1) = -359.4 kJ(2)Mg(s) + Cl2(g)MgCl2(s)     H(2) = -641.3 kJcalculate the enthalpy change for the following reaction:(3) Pb(s) +... more
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Biochemistry Math Science Biology

04/04/21

Calculate enthalpy
The following reaction is exothermic. N2(g)+H2(g)+3O2(g)=2HNO3(g) deltaH(1)=-270kjcalculate the enthalpy change for the reaction of the elements to form one mole of HNO3(g). 1/2N2(g)+1/2H2(g)+3/2... more
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Biochemistry Math Science Biology

03/29/21

Determine the concentration of the acid
The flask contains 25mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Tritrate the solution with NaOH to determine the concentration of the acid.
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Biochemistry Math Science Biology

03/29/21

Determine unknown volume 
Calculate the volume of 6.93x10^-2 M calcium hydroxide required to neutralize 28.2 mL of a 0.147 M hydrochloride acid solution.
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Biochemistry Math Science Biology

03/29/21

Use Use primary standard to determine unknown concentration 
Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand... more
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Biochemistry Math Science Biology

03/28/21

Use primary standard to determine unknown concentration

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand... more
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Biochemistry Math Science Biology

03/28/21

Determine unknown volume

Calculate the volume of 6.93x10^-2 M calcium hydroxide required to neutralize 28.2 mL of a 0.147 M hydrochloride acid solution.
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Biochemistry Science Chemistry

03/28/21

Chemical or physical change?
Why is the dissolving of aluminum nitrate in water considered both a physical and chemical process?
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Biochemistry Chemistry

03/26/21

Amino acids in different pH
Hi!I've got a question that I'm having trouble with solving:How does the dipeptide asp-ser (aspartic acid and serine) look like ata) pH = 1b) pH = 7c) pH = 13Motivate your answersI would appreciate... more
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Biochemistry Biology

03/26/21

Leopard species

What evidence of evolution supports that the Indochinese and North Chinese leopards are the common ancestors of the Amur leopard
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