Tuesday
July 29, 2014

Posts by reese


Total # Posts: 31

chemistry dilution
thanks Devron and DrBo222

chemistry dilution
Given VLP with concentration 200ug/mL, dilute to 3ug/100ul. Please help me with this; many thanks

algebra
Allison drove home at 66 mph, but her brother Austin, who left at the same time, could drive at only 48 mph. When Allison arrived, Austin still had 54 miles to go. How far did Allison drive?

Math
Alicia had 2 1/2 yards of ribbon. She used 1/3 of the ribbon on the costume and 25% on a bracelet. How many yards did she use?

pre calculus
are you an online tutor

Staistics
17 green marbles and 14 white marbles what is the probability of choosing a white marble first chosen without replacement was a green marble

english
I am having trouble understanding compound verbs and subjects can someone help for example what is the compound subject and verb of "Cats have long been valued for their skills as a hunters."

english
what is the compound verb & subject of the sentence "local governments and citizen groups often employ city planners." I don't understand compound verbs

Spanish
Number 47 is "te doy" since the subject is first person singular, "Yo". Even though the question is asked in plural form, her mother when answering is breaking up the answer by mentioning what she is giving her first. Number 49 is A) Les damos, since this i...

Physics
Halley’s comet orbits the Sun with a period of 76.2 years. a) Find the semi-major axis of the orbit of Halley’s comet in astronomical units (1 AU is equal to the semi-major axis of the Earth’s orbit Physics - drwls, Thursday, May 5, 2011 at 8:51am There is a sim...

Physics
Halley’s comet orbits the Sun with a period of 76.2 years. a) Find the semi-major axis of the orbit of Halley’s comet in astronomical units (1 AU is equal to the semi-major axis of the Earth’s orbit Physics - drwls, Thursday, May 5, 2011 at 8:51am There is a sim...

Physics
Halley’s comet orbits the Sun with a period of 76.2 years. a) Find the semi-major axis of the orbit of Halley’s comet in astronomical units (1 AU is equal to the semi-major axis of the Earth’s orbit

Physics
Halley’s comet orbits the Sun with a period of 76.2 years. a) Find the semi-major axis of the orbit of Halley’s comet in astronomical units (1 AU is equal to the semi-major axis of the Earth’s orbit).

Gem=neral Chemistry 106
A gas occupying a volume of 806 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?

Visual Basic
First off, Thank you MathMate. As for it being incomplete, I'm in the process of writing it, I've just run into a wall, really. The commission structure is Commission = Commission rate * (Sales price - Cost Value) I was told by the professor to use one of the hands-on ...

Visual Basic
Alright, so I'm trying to code a program to where I can plug in two numbers and get a commission cost out of them. I'm having a hard time setting up the code, and I'm really looking for some guidance. I have this as the code so far: Public Class Form1 'Declare ...

Physics
An athlete starts at point A and runs at a constant speed of 5.40 around a round track 150m in diameter. Find the x component of this runner's average acceleration between points A and B. I dont even know how to start. Please help!

PHYSICS
A 120-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 450 N. For the first 11 m the floor is frictionless, and for the next 11 m the coefficient of friction is 0.30. What is the final speed of the crate?

English
How can i write 5 sentences on the topic education using a noun, pronoun, verb, adverb, adjective and preposition

physics
A ball thrown horizontally at 17.0 m/s from the roof of a building lands 36.3 m from the base of the building. How tall is the building? could someone PLEASE tell me how to go about solving this problem!

CHEMISTRY!
A zero-order reaction has a constant rate of 3.40×10−4 M/s. If after 80.0 seconds the concentration has dropped to 6.00×10−2 M, what was the initial concentration?

Chemistry!
The rate constant for a certain reaction is k = 5.00×10−3 s-1 . If the initial reactant concentration was 0.950 M , what will the concentration be after 8.00 minutes?

chemistry
Potassium nitrate has a lattice energy of -163.8 kcal/mol and a heat of hydration of -155.5 kcal/mol. How much potassium nitrate has to dissolve in water to absorb 114 kj of heat?

chemistry
Use Henry's law to determine the molar solubility of helium at a pressure of 1.5 atm and 25 degrees celsius . this is what I know... Sgas = kH x Pgas so then I plugged in... Sgas = 3.7 x 10-4 x 1.5 my answer was .055 and it is wrong. could someone please help show me what ...

chemistry
which of the following factors affect the vapor pressure of a liquid? amount of liquid atmospheric pressure addition of solute temperature type of liquid surface area of the liquid

chemistry
how much heat (in KJ) is evolved in coverting 1.00 mol of steam at 135.0 degrees celcius to ice at -45.0 degrees celcius? the heat capacity of steam is 12.0 J/g * C and ice is 2.09 J/c * C.

chemistry
a 50.0 ml sample of water is heated to its boiling point. how much heat (in KJ) is required to vaporize it? (assume a density of 1.00g/ml).

Science
I need to know what the source of energy which causes mountain building by folding or faulting? What form(s) of energy is involved? This was the only question I need help with so thanks a bunch for the help!!!! :-D

math
nicole was 1/2 as old as she will be in 8 years . how old is nicole

Business and Technology
tariffs, quotes and VERs? Advantage or disadvantage?

Math
6*1/2 3 pretty much 6 X .5 which is the half of 6 which is 3!

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