Thursday

February 23, 2017
Total # Posts: 490

**chemistry**

A gas occupies 8.2 liters at 2.5 atm. What is the pressure if the volume becomes 7.5 L?

*March 3, 2011*

**ipc**

how much power is used to move a 25 kg mass 8 meters in 15 seconds

*February 28, 2011*

**Math**

90/65=.7222*5=3.6111+5=8.6111 8.1 feet

*February 27, 2011*

**ap chem**

ok, i'm given: Ethylene Glycol C2H6O2 is the main ingredient in antifreeze. density of pure EG: 1.132 g/mL Anti-freeze is 32% by volume EG I have to find: Volume of Eg in 1 L Mass of Eg in 1 L & the Volume of "solvent" in 1 L Can someone help me? and give me some...

*February 27, 2011*

**ap chem**

ok, so i have to find the mass of the HNO3 in 1 L and the mass of the H2O in 1 L. I'm given: HNO3 solution 1.42 g/mL 16M I'm really terrible at this stuff and it should be easy, but I have no idea where to start.

*February 25, 2011*

**ap chem**

ok, sweet. i had most of that set up right. so the mass of HNO3 = 1008 g & the mass of H2O = 412 g?

*February 25, 2011*

**ap chem**

ok, so i have to find the mass of the HNO3 in 1 L and the mass of the H2O in 1 L. I'm given: HNO3 solution 1.42 g/mL 16M I'm really terrible at this stuff and it should be easy, but I have no idea where to start.

*February 25, 2011*

**ap chem**

would you multiply the 93.37 and the 1.071 then? is 100g correct?

*February 24, 2011*

**ap chem**

would it be 89.28 g?

*February 24, 2011*

**ap chem**

I'm supposed to find the mass of NaCl in 1 L & the mass of H20 in 1 L. I'm given NaCl solution. 1% by mass. The Density is 1.071 g/mL. I know the answer for NaCl is 10.71 g, but I don't know where to start to get to this. Could you lead me in the right direction?

*February 24, 2011*

**essay writing**

same here... yall should rethink your answer

*February 3, 2011*

**spelling 2nd grade**

give me a senec with prehistoric

*January 23, 2011*

**geometry**

the area of the first triangle is 22 sq feet. if the scale factor of two similar traingles if 3, what is the area of that second triangle>?

*January 18, 2011*

**Science**

very urgent!!!!!!!!! plzz plzz answer or attempt!

*January 18, 2011*

**Science**

8. The balanced equation P4 (s) + 6H2 (g) --> 4PH3 tells us that 2 mol H2 a. reacts with 1 mol 4 b. produces 4 mol PH3 c. cannot react with phosphorus d. produces 2 mol PH3 e. reacts with 2 mol P4 idk y i cant seem to get the answer from the choices above?

*January 18, 2011*

**math**

1 1/12 = 13/12 =2-13/12 = 24/12-13/12 =11/12 of a cake left over.

*January 18, 2011*

**chemistry**

Yupp, Calcium Hydroxide. Ca is the cation --> calcium OH is the polyatomic anion--> hydroxide (: Hope it helped!

*January 18, 2011*

**algebra**

(6y+1)(6y-1)

*January 18, 2011*

**Chem 11**

4.21

*January 18, 2011*

**Geometry**

Right triangle

*January 18, 2011*

**Visual Basic - Computer Science**

Public Class Form1 Public SparkPlugsString(,) As String = {{"VBAutoPart", "Brand A", "Brand C", "Brand X"}, {"PR214", "MR43T", "RBL8", "14K22"}, {"PR223", "R43", "RJ6"...

*December 19, 2010*

**Visual Basic - Computer Science**

I'm trying to right a program with Multidimensional Arrays. These are the instructions for the program: The Valley Boulevard (VB) Auto Center management is pleased with your progress in developing their system. They require you to develop a new feature for their system. ...

*December 19, 2010*

**chemistry**

using a universal ph paper to test the Ph of purple grape juice is unlikely to be successful why

*December 15, 2010*

**Physics**

Define the focal length of a convex mirror?

*December 14, 2010*

**Math**

x+2=6 and its under a square root thing

*December 11, 2010*

**Math**

3x-6y=12 find the slope, y intercept and general equation

*December 11, 2010*

**Math**

solve using addition or subtration 12x+9y= 14 6x= 7y - 16

*December 11, 2010*

**math**

Mrs.penn has a circular tablecloth with a circumference of 29 feet. Which expression could be used ro find the radius of the tablecloth? f. 29 - 2 pie g. 29/2 pie h. 29/pie j 29 + 2pie

*December 6, 2010*

**Chemistry**

the idea expressed in whims is known as

*December 3, 2010*

**science**

chief or ruler .

*November 30, 2010*

**5th grade**

what is the smallest number of pencils that are needed to put into jars holding 3,6 and 9 leaving no remainder.

*November 23, 2010*

**precal**

the terminal side of an angle in standard position coincides with the line y=x in quadrant I. find tan to the nearest thousandth

*November 17, 2010*

**Math**

if four friends share equally a 48 ounch bag of popcorn what fraction would each one get?

*November 8, 2010*

**algebra**

x/14+12=3x-8.5

*November 4, 2010*

**algebra**

x/14+12=3x-8.5

*November 4, 2010*

**Algebra**

x/14+12=3x-8.5

*November 4, 2010*

**Math**

Find a number whose square root is 24 more than 5 times the number. How do I set up this problem? Thank you for any help!

*October 23, 2010*

**algebra I**

Find a number whose square root is 24 more than 5 times the number. How do I set up this problem?

*October 23, 2010*

**AP CHEM**

HIO3 + FeI2 + HCl --> FeCl3 + ICl (in acidic solution) Show and label the two balanced half-reactions (oxidation and reduction). Add H2Os, H+s or OH-s as needed.

*October 23, 2010*

**Physics**

What force is required to accelerate an object of 1.484x10^0 kg over a frictionless surface at -2.3580x10^0 m/s2 expressed to three significant figures.

*October 22, 2010*

**Chemistry**

921.4919096 g/mol does this look to be right? or 1 grams 850.49 NF3 is equal to 0.00108519672238 mole does this look better?

*October 22, 2010*

**Chemistry**

How many moles of NF3 are in 850.49 grams of nitrogen triflouride

*October 22, 2010*

**Chemistry**

ok so C = 19x 12.01 = 228.19 H = 97 x 1.001 = 97.097 Cl = 35 x 35.45 = 1240.75 =1566.037 g/mol is this look ok

*October 22, 2010*

**Physics**

A motorcycle with an initial velocity of 7.99x10^0 m/s accelerates for a total of 3.3x10^0 seconds at a rate of 1.51x10^0 m/s2. What is it's velocity, to two significant figures? can anyone show the calculations for this

*October 13, 2010*

**Physics**

For a standard production car, the record for road test acceleration goes to the 1993 Ford RS200 Evolution. This car went from 0 to 2.911x10^1 m/s in 3.279x10^0 seconds. What is the average acceleration, expressed to 3 significant figures?

*October 13, 2010*

**AP Chem**

A student chemist named Hannah Montana set up an electrical conductivity tester similar to that shown on page 141 and conducted an experiment involving two clear, colorless liquids, identified as solution A and solution B. Solution A and Solution B are both 0.050 M. The ...

*October 11, 2010*

**Geography**

How do the shores of Long Island differ from each other. The South Shore and he North Shore

*October 6, 2010*

**social studies**

does anyone know the 4 prehistoric indian groups that lived in indiana?

*October 5, 2010*

**math**

This is dylan i am just learning square root i need this answer for my homework which is do tommorow so please write the answer back to me thanx every1 and please check your answer before ypu post it.Thanx Every1.

*September 23, 2010*

**math**

Each ostrich needs a pen about 20 feet by 10 feet.How many square feet of space will be needed by 11 ostriches.

*September 23, 2010*

**5th grade math**

In the zoo there is penguins and polar bears 120 people visted both of them but only 75 people to photograghs how many people bought souvenior photographs please multiply

*September 21, 2010*

**geography**

What does Pig ears stand for?

*September 21, 2010*

**geometry**

X would be 17.5, as long as the answer isn't required to be a whole number.

*September 20, 2010*

**physics**

need answer fast- running out of time

*September 7, 2010*

**physics**

A truck is stopped at a stoplight. When the light turns green, it accelerates at 2.7 m/s2. At the same instant, a car passes the truck going 18 m/s. Where and when does the truck catch up with the car?

*September 7, 2010*

**Science**

The portion of the nervous system that controls involuntary activities is a subdivision of the ____ nervous system. A. sympathetic B. central C. peripheral D. parasympathetic I think it's either B or C right?

*September 1, 2010*

**Science**

What process describes how a signal travels from one end of a neuron to the other end? A. Hormonal regulation B. Muscle coordination C. Membrane excitability D. Neurotransmitter release I'm pretty sure the answer is C but just want to be positive.

*September 1, 2010*

**medicine**

A patient was experiencing indigestion almost every day. The physician performed an upper GI series, also known as a ____ test. a) bronchographic b) barium enema c) cholangiographic d) barium swallow I've been searching for hours and cant find the answer. Please help!!!

*August 6, 2010*

**How Children learn**

19. C 20. A

*May 13, 2010*

**math HELP**

ur such a homo. oh and your mom wanted to join

*May 6, 2010*

**math HELP**

why don't u want to join

*May 6, 2010*

**8th grade**

thanks wanna join

*May 5, 2010*

**8th grade**

what is a historical fact about independent and dependent events. im having so much trouble finding this answer on the enternet. HELP! thanks

*May 5, 2010*

**trigonometric**

ya drwls is right haha

*May 5, 2010*

**math #2**

Look at the pattern of shaded numbers. use place value to describe how the number change. 501 is shaded,502,503,504,505,506,507,508,509,510,511,512,513 is shaded,514,515,516,517,518,519,520,521,522,523,524,525 is shaded,526,527,528,529,530,531,532,533,534,535,536,537 is shaded...

*April 26, 2010*

**math**

Look at the pattern of shaded numbers. use place value to describe how the number change. 501,502,503,504,505,506,507,508,509 is shaded,510,511,512,513,514,515,516,517 is shaded, 518,519,520,521,523,524,525 is shaded,526,527,528,529,530,531,532,533 is shaded,534,535,536,537,...

*April 26, 2010*

**math**

Look at the pattern of shaded numbers. use place value to describe how the number change.

*April 26, 2010*

**8th grade chemistry**

the answer is c :)

*April 21, 2010*

**Math**

A vase had 4 yellow flowers, 4 red flowers and 8 blue flowers. Donna takes one out, smells it and returns it to the vase. What is the probabilty she picked a red flower? What is the probabilty she picked a blue flower? Is it red 4:16 and blue 8:16?

*April 15, 2010*

**Math**

A die is rolled once. What is the probability of getting number 5?

*April 15, 2010*

**Math**

change the equation 2x+5y=8 into the form of y=ax+b and then substitute for the value of X by ( 0 , 1 , 2 , 3 ) 3 points are enought and line them on a graph.. Note : the second equation has the same way!

*April 13, 2010*

**math**

seven thousands five hundred fourty two.. THATS IT!

*April 12, 2010*

**Math**

Its is (2x+5)^2... That's the correct Factorized answer

*April 12, 2010*

**Math**

Developed form : x^2 -1/2x -7x -7.5 : x^2 -7.5x -7.5

*April 12, 2010*

**math**

Ok now that makes more sense to me. i must have typed it wrong. thank you.

*March 28, 2010*

**math**

It would be more of a drop. But i still done get the formula. did i do the formula right in the first place?

*March 28, 2010*

**math**

Would a drop of 40 Celsius degrees be more or less than a drop of 40 fahrenheit degrees? explain why C = 5/9 (F - 32)40-32=8c F = 9/5 C + 32 40+32=86f

*March 28, 2010*

**6th Grade Grammar**

Its A

*March 17, 2010*

**6th Grade Grammar**

Present Perfect

*March 17, 2010*

**4th grade**

I have a rectangle equally divided into 24 parts I must cut it into 5 pieces and make a new shape. cannot bea rectangle

*March 9, 2010*

**preschool**

wow teach him to talk

*January 30, 2010*

**math**

Calculate the area of each composite figure.round to the nearest square unit, if necessary. a)15mm, 8mm, 10mm 30mm

*January 26, 2010*

**math**

The slopes of the two lines are given. Conclude whether the lines are parallel, perpendicular, or neither. a)m=2/3,m=4/6 b)m=3/4,m=-4/3 c)m=2,m=-2 d)m=1,m=-1 e)m=1/5,m=0.2 f)m=2 1/4, m=-4/9

*January 24, 2010*

**math**

The equation 9c-5f+160=0 describes the relationship between temperature, C, in degrees Celsius, and temperature, F, in degrees Fahrenheit. b)graph this relation.

*January 24, 2010*

**12th grade**

What is answer to 2/3 to second power and how do I calculate

*January 12, 2010*

**Chemistry**

does BaCl2+Pb(NO3)2 form a percipitate

*December 27, 2009*

**math**

what is the slope-intercept of:y=x-1

*November 17, 2009*

**Pre Calculus**

see... (- sin pi/12 + pi)/(sin (25 pi)/12 + pi) this becomes (sin pi/12 + pi)/(-sin (25 pi)/12 + pi) finish it off and you get negative one... why is sin(-20)/cos(380) equal to tan(-200) I don't understand

*November 15, 2009*

**Pre Calculus**

ok I appologize for my stupidity... I'll answer your question... ok instructions to this problem In problems 77-88, use properties of the trigonmetric functions to find the exact value of each expression. Do not use a calculator 85. sin(-pi/12)csc( (25 pi)/12 ) book dosen...

*November 15, 2009*

**pre-algebra**

didn't get a clear answer, i do not understand how to find the answer to this problem:2y=2x+10

*November 13, 2009*

**algebra**

how do you find the slope-intercept of a line?

*November 13, 2009*

**math**

Three authors team up to write a childrens book. The publisher pays them according to the following contracts Author - Fixed Rate - Royalty Patricia $3000 - 1n Stephan - $1500 - 2n Harlan - $1000 - 3n Find a simplified expression that represents the total that the publisher ...

*October 27, 2009*

**math**

Three authors team up to write a childrens book. The publisher pays them according to the following contracts Author - Fixed Rate - Royalty Patricia $3000 - 1n Stephan - $1500 - 2n Harlan - $1000 - 3n Find a simplified expression that represents the total that the publisher ...

*October 27, 2009*

**Math**

Histogram, with data hours of sleep per night at 5 to 11 hours and scores from a quiz starting at 38 points to 92 points, how would that look?

*October 4, 2009*

**government**

is there a culture where they swore and had a sense to not get addicted to somthing

*September 24, 2009*

**Chemistry**

how do i know the specific heat?

*September 23, 2009*

**Chemistry**

I have a few problems im having trouble with, any help..? 1. If a peice of aluminum with mass 3.90g and a temperature of 99.3C is dropped into 10.0cm^3 of water at 22.6C, what will be the final temperature of the system? 2. If a peice of cadmium with a mass 65.6g and a temp. ...

*September 23, 2009*

**math**

the largest multiplication combonation for 180

*August 31, 2009*

**animals**

2. Out of these 5 animals, The animal that must eat most frequently to meet its energy needs is a. raccoon b. frog c. snake d. worm e. grasshopper

*August 31, 2009*

**5th Grade Math**

64

*August 29, 2009*