Posts by alberto

Total # Posts: 28

Biochemistry
You are asked to prepare 2 L of 50 mM sodium phosphate pH 7.0. The pK2 of phosphate is 6.8. What are the amounts of sodium phosphate mono basic monohydrate (NaH2PO4 • 1H2O, MW=137.99 Da) and anhydrous sodium phosphate dibasic (Na2HPO4, MW=141.96 Da) that must be weighed out?

Biochemistry
You are asked to make 50 mM Tris-HCl pH 7.5. The pK of Tris is 8.1. What is the concentration of the components (Tris and Tris-H+) in the final buffer solution?

chemistry
Calculate the volume of HNO3 that must be introduced in the calorimeter,knowing that it were used 60 ml NaOH, Cc=100cal/grd and delta H=-13,5 kcal/mol.. please help me,i have no clue for this..

English
In my brother's keeper by Jay ... What is the conflict?

math
a gear on a bicycle has the shape of a circle one gear has a diameter of 4 inches and a small one has a diameter of 2 inches Justin says that the circumferences of the larger gear is 2 inches more than the circumferences of the smaller gear do you agree explain your answer

Math
Rina saves $4.50 each week. Her sister save $2 more each week. When her sister has saved $14 more than Rina, how much has Rina saved?

Algebra
A rectangular piece of cardboard is 15 inches longer than it is wide. If 5 inches are cut from each corner, and the remaining fold up to form a box,the volume of the box is 1250 cubic inches. Find the dimensions of the piece of cardboard.

economics
main characteristics of the market system

math (story problems)
23.28 pages per hour

math (story problems)
Andy took a reading test. He read 97 words per minute. If a book has an average of 250 words on a page, how many pages can Andy read in one hour?

math
161.5 centimeters tall (thank you)

math
Sandy is 5.3 feet tall. How many centimeters tall is she? Round your answer to the nearest tenth.

math
Jill is 20 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 1.5 kilometers per hour. They meet in 5 hours. How fast is Joe walking?

Physics
An astronaut has crash landed on a planet that little is known about (not even the acceleration due to gravity). She must descend a steeo cliff to find shelter, but wants to know how high the cliff is before making the attempts. She happens to have salvaged a stopwatch from ...

chemistry
Hypothesis on "behavior of solids on warming".

science
What is the effect of the type of alcohol (methanol, ethanol and pentanol) on the evaporation time?

chemistry
Highest = NaF Medium = CH3I Lowest = CH4

math
a fire fighter's 36 foot ladder leans against a building. the top of the ladder touches the buliding 28 ft above the ground. what is the measure of the angle of the ladder forms with the ground?

math
cx+7 if x<or=2 f(x)= cx^2-5 if x>2 determine any values of c which make f continuous for all real numbers (c=6) determine any values of c which make f differentiable for all real numbers ???

Math
I am less than 100, the sum of my digits is 8. If you divide me by 2, I am an even number. My tens digit and my ones digit are the same. What is the answer

physics
there is absolutely no way its that complicated. and at points it looks like you made up some values. be more clear.

en forma estandar
como se escribe 423,090,709,000 en forma estandar

ENGLISH
WHAT TYPE OF INTRODUCTION AND WHAT TYPE OF CONCULUSION CAN I USE TO WRITE IN MY RESEARCH PAPER? HOW DOES THE INTRODUCTION DRAW READERS INTO MY ARGUMENT, AND HOW DOES THE CONCLUSION NEATLY TIE UP MY PAPER? MY THESIS IS JUVENILE SEX OFFENDERS

writing
if this is a subject verb agreement Did you know a famous animal rights activist has criticized horseracing because of the danger involved? and why

pseudocode programming
need help to write a sumsquare function module and then rewrite that fuction module into an algorithm from this pseudocode. count integer square integer sumsquare integer count = 0 square = 1 do while count <= 2 count = count + 1 sumsquare = sumsquare + square end do this ...

algorithm
can someone tell me if this is correct. Write an algorithm that will display the sum for a given number of squares. In other words if the user enters the value 5, then the output should be 1^2 + 2^2 + 3^2 +4^2 + 5^2 = 55. sumsquare integer square integer count integer ...

progra
how would i be able to write a function module for average from this pseudo-code and then use it to write an algorithm. Sum integer Num integer Count integer Count:= 0 Sum:=0 Dowhile count <3 Println “Enter Num: ” Read Num Sum := Sum + Num Count:= count + 1 ENDDO ...

programming techniques
how do modular program work, can you show me an example of it using dowhile pseudo code.

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