Math

We have an important chemsitry test due and I want to make sure that I do not mess up on my algebra. I am dealing with the integrated rate law, but my question is purely algebraically in nature. I hope, somebody can help me.

1) ln(A) = -kt+ln(B)

solve for t
solve for k
solve for B

2) 1/(B) = kt + 1/(B)

solve for k
solve for t
solve for B

Thank you so much for your help. It is greatly appreciated

  1. 👍 0
  2. 👎 0
  3. 👁 678
  1. 1)
    ln(A) = -kt+ln(B)
    kt = lnB - lnA
    kt = ln(B/A)
    t = ln(B/A) / k

    k = ln(B/A) / t

    lnB = lnA + kt
    B = e^(lnA + kt)

    2)
    1/B = kt + 1/B
    0 = kt
    t = 0
    or
    k = 0
    B is any value except B≠0
    (are you sure you have no typo in 2) ?

    1. 👍 0
    2. 👎 0
  2. 2) should be 1/(B) = kt+1(A)
    I am dealing with concentrations and A and B are just placeholders for the concentrations.
    Thanks

    1. 👍 0
    2. 👎 0
  3. 2) I thought there was something wrong with your first typing of the question

    1/B = kt + 1/A
    multiply each term by AB, the LCD
    A = ABkt + B
    A - B = ABkt
    t = (A-B)/(ABk)
    k = (A-b)/(ABt)

    from: A = ABkt + B
    A = B(Akt + 1)
    B = A/(Akt + 1)

    1. 👍 0
    2. 👎 0
  4. kt00 b =2

    1. 👍 0
    2. 👎 0
  5. Solve:
    3x(x + 4) + 3(x + 4) = 0
    A) 0 and -4
    B) -1 and 4
    C) -1 and -4
    D) 1 and 4

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. English

    Five sentence paragraph. Preparing for a test should start the first day in class this includes paying attention in class,taking good notes,review all assignments on a regular basis. Budget your time make sure you set aside time

    asked by Rebecca please read on February 22, 2015
  2. Math

    Ty received test grades of 73%,82%,73%,77%, and 77%. a) what grade would he need to make on the sixth test to get a "C" if a "C" is at least 75% but less than 80%? b) Is it possible for Ty to get a B or better for his test average

    asked by Alice on January 18, 2019
  3. statistics

    A credit card company estimates that the average credit card balance of Americans is $3,210. A statistics student wants to know whether this is true for citizens of her home town. Which hypothesis test would be most appropriate

    asked by madi on March 14, 2015
  4. Math

    Typically, 10% of students make a D on their tests, 60% make a C on their test, and 30% make an A. Mrs. Smith uses a random-number table to find the experimental probability that of 5 students', at least 3 will make a C. The digit

    asked by HELP!:) on June 9, 2015
  5. statistics

    2. Why is it important to know the mean and standard deviation for a data set when applying the empirical rule? 3. If we are focused on 68% of the normal distribution, what percentage of the distribution is left in the upper tail

    asked by Cam on April 23, 2013
  1. english

    Please help me to correct my anserw below.thank you Petroleum, or crude oil, is one of the world's (1) _____ natural resources. Plastics, synthetic fibres, and (2) _____ chemicals are produced from petroleum. It is also used to

    asked by jessie on April 27, 2017
  2. mathematics

    Jake correctly answered 15 out of 25 questions in Test 1 and 18 out of 25 questions on test 2. On Test 3 he missed 5 out of 27 questions. Which test had the best score? A) Test 2 and Test 3 B) Test 2 C) Test 3 D) Test 1 ??

    asked by Jackie on August 6, 2015
  3. Math

    A boy's test grades are 68 , 72, 78, 80 and 86. What grade must he get on his next test to make his test average exactly 75?

    asked by Pat on August 19, 2015
  4. Educational Technology

    1. Why is it important to have good study skills? (A)You will sleep better (B)You will learn more efficiently---- (C)You will have less free time (D)You will impress your parents 2. Why is it important to know how much time you

    asked by Rose on January 18, 2018
  5. speech

    Choose one of the following topic sentences. Write an eight-sentence paragraph that fully develops the topic. A. The number of automobile accidents in my town can be reduced. B. People are moving from the cities to the suburbs in

    asked by Cris on June 4, 2007
  6. 7th grade ss unit 1 lesson 13 test

    I am stuck on the test ss 2b one the lesson 13 test Why is mining important to the economy of the Untied states? I but mineral I am so stuck on this test

    asked by j on March 6, 2017

You can view more similar questions or ask a new question.