Recent content by coookiemonste

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    Possible Replication Mechanisms for Phage RNA in Offspring

    Homework Statement Consider the genome of an RNA phage where only one strand of RNA is packaged into the phage. How can this phage produce many offspring that all have the same strand of RNA? Homework Equations The Attempt at a Solution mitosis?
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    OCHEM transition states and reaction rates

    Homework Statement Explain why 2-bromopropane reacts with NaI in acetone over 10^4 times faster than bromocyclopropane. (Hint: examine the transition state for each of the reactions) Homework Equations The Attempt at a Solution I understand this is a sn2 type reaction and...
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    Calculating pH of Limestone Quarry Water | H2CO3 pk1=6.37, pk2=10.32

    Homework Statement Find the pH of water in limestone (CaCO3) quarry. H2CO3 pk1=6.37, pk2=10.32 Homework Equations pH=pKa + log [conjugate base]/[acid] Kw=10^-14 The Attempt at a Solution CO3 2- + H2O -> HCO3- + OH- Ka= [HCO3-][OH-]/[CO3 2-] 10^-10.32=x^2/[10^-6.37] [OH-]=x=.01059...
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    Find pH at Endpoint: Formic Acid Titration with NaOH Solution - 8.32 Answer

    Homework Statement 10 mL of a solution of formic acid HCOOH required 31.23 mL of .1034 M NaOH to titrate it. Find the pH at the endpoint. Answer is 8.32. Homework Equations pH=pKa + log[A-]/[HA] The Attempt at a Solution initial concentration of HCOOH is .3229 M from fact .1034...
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    Spontaneous Expansion of Gas into Evacuated Container: Thermodynamic Analysis

    thank you!
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    Spontaneous Expansion of Gas into Evacuated Container: Thermodynamic Analysis

    Enthalpy is equal to the internal Energy + PV. So is delta H=0?
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    Spontaneous Expansion of Gas into Evacuated Container: Thermodynamic Analysis

    Hmm. If the gas is considered ideal, delta E would be zero. Since the internal E depends on T, we can assume that this is an isothermal reaction? Should delta H be + because added heat is needed to make the gas expand?
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    Spontaneous Expansion of Gas into Evacuated Container: Thermodynamic Analysis

    Homework Statement A gas spontaneously expands into an evacuated container. Indicate whether delta T, delta E, delta H, delta S, q, w, and delta G are positive, negative, or zero. Homework Equations delta G < 0 (spontaneous) delta G= delta H - TdeltaS delta E= q + w [/B] The...
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    Partial Fractions Calc Problem

    Homework Statement ∫1/[(x+a)(x+b)]dx answer is 1/(a-b) ln[(x+b)/(x+a)] + C Homework Equations The Attempt at a Solution 1=A/(x+a) + B/(x+b) 1=B(x+a) + A(x+b) 1=Bx+ Ba + Ax +Ab so 0=Bx+ Ax, 1=Ba+Ab A=-B, 1=B(a-b) ∫-1/(x+a) +∫1/(x+b) Im not sure if I am headed in...
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    Increasing Function: Finding k When x=pi/4

    that it is just simply the slope of sinx^2 when x=pi/4 which is 1 ?
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    Increasing Function: Finding k When x=pi/4

    i think dy/dt would be 1. how do i find dx/dt?
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    Increasing Function: Finding k When x=pi/4

    Homework Statement When x=pi/4, the rate at which sinx^2 is increasing is k times the rate at which x is increasing. What is the value of k? (answer is 1) Homework Equations The Attempt at a Solution I plugged in pi/4 into sinx^2 and i got .5. i also took the derivative of...
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    Finding the Value of b for a Point of Inflection at (2,0)

    i wouldn't of thought of that. thank you
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    Calc Tangent Problem: Find Lines Tangent to f(x) at x=-1

    thanks!
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    Finding the Value of b for a Point of Inflection at (2,0)

    Homework Statement If the graph of y=x^3+ax^2+bx-8 has a point of inflection at (2,0), what is the value of b? the answer is 8. Homework Equations The Attempt at a Solution y'=3x^2+2ax+b y''=6x+2a Let y''=0=6x+2a then i plugged in 2 for x and got -6=a So y'=3x^2-12x+b... I...
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