Wednesday

March 4, 2015

March 4, 2015

Total # Posts: 384

**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*

**sience**

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 awnser for my homework which is do tommorow so please write the awnser back to me thanx every1 and please check your awnser 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 dont 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... Thats 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*

**english 12**

if you have found an asnwer please let me know also because im doing the exact same work, ENG4C except im doing lessons and this is lesson 14
*June 9, 2009*

**Algebra 2**

How do I do this f(x) = x - 5 (x + 4)^(1/2) when f(x) = -5 I know I can just guess and chekc but I want to know how to do this algebraically by subsituting in -5 and trying to solve for x which I don't know how to do... so -5 = x - 3 (x + 4)^(1/2) how do I solve for x?? ...
*May 26, 2009*

**Algebra 2**

I apologize for doulbe post forgive me
*May 26, 2009*

**Algebra 2**

Helllo I have no idea how to do this problem given f(x) = x-3(x + 4)^(1/2) how to solve for x when f(x) = -5 I know I could just guess and check but I would like to know how to do this algebraically by pluging in -5 like so -5 = x - 3 (x + 4)^(1/2) and solving for x which I ...
*May 26, 2009*

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