Total # Posts: 473
are these right? How many atoms are there in 1.3x10^22 molecules NO2? atoms=(1.3x10^22 molecules NO2) x (2atoms/1molecule) = 2.6x10^22 atoms NO2 A 5.0g sample of O2 is in a container at STP. How many atoms of oxygen are in the container? atoms = (5.0g O2) x (1mol/32g)x (6....
December 14, 2008
if you want to square both sides to get rid of the square root you have to square the whole thing so (1.3square root h)^2 which equals 1.69h instead of 1.3h so h should = 142.16
December 14, 2008
Hello, Does this sentence make sense? If not, can you please provide suggestions on what I could write in place of? I need a sentence that is strong to reflect my desire to enter the business workforce. I find myself driven, as I expect to demonstrate my qualities that will ...
December 12, 2008
trigonometric functions/ radians the angle Ə is in the first quadrant, and cos Ə = 2/√5 a) draw a diagram to show the angle in standard position and a point P on its terminal arm b) determine possible coordinates for P
November 30, 2008
determine the difference between the sum of the infinite geometric series 18-6+2-2/3...and the sum of the first 6 terms of the series (round to 3 decimal places) first i did S=18/ (1+1/3)= 13 1/2 Sn= 18(1+(1/3)^6) _____________ 1 + 1/3 = 13 14/27 13 1/2 - 13 14/27 = -1/54 what...
November 17, 2008
Can you please see if these sentences are written correctly in Spanish? Thank you. Doctor, me siento cansada y enfermera. También, tengo poco o nada de apetito. Yo tengo una fiebre de un ciento y dos grados Fahrenheit. Doctor, me duele cabeza y tengo una garganta ...
November 17, 2008
I have to write a simple Latin poem by tomorrow; we can literally write anything. Does anyone know any good websites for inspiration?? or want to tell me a poem in latin i could use.
September 18, 2008
Calculus (Urgent Help)
I hope you realize by doing this you are helping students taking online calculus cheat on their test, as this is direct content from the test under Unit 6 Activity 9.
July 25, 2008
I think that the similarities in rational expressions and fractions are very similar in functions. The need to utilize common denominator and find the LCD is relatively the same. The factoring process between the two is similar, but the difference is in the use of xs and...
April 3, 2008
since there are 10.00 moles of sulfur trioxide, shouldn't the initial concentration of SO3 = 5.00 M? (you have it posted as O2 = 5.00 M) And for part b, I'm having problems on letter iii. I don't understand how the equilibrium constant would be affected by ...
January 12, 2008
For the system 2SO2(g) + O2(g) <--> 2SO3 (g), change in enthalpy is negative for the production of SO3. At a particular temperature, 8.00 moles of sulfur dioxide and 10.00 moles of sulfur trioxide are introduced into a 2.00 L container. The system is allowed to reach ...
January 12, 2008
Which sentence below contains a correctly used modifier? a) He spoke "sharply" to his sister. b) I feel "goodly" now that I'm over the flu. c) The sauce tasted "bitterly", and I couldn't swallow it. d) Joe looked "sad" at his ...
November 28, 2007
The answer is c) ns^2 np^5 I know this because in addition to the explanations posted, above I just did this for my chemistry homework. I'm guessing you also have Mastering Chemistry?
November 13, 2007
the numbers vary a lot. like some of the numbers are .004 and some are 1999. how would you graph that big of a difference?? and it asks questions like at what wavelength was the absorbance the greatest but for the color red i recorded the absorbance to be 1999 at 6 different ...
November 6, 2007
can someone explain to me how to answer this: Polycarbonate plastic has a density of 1.2 g/c3. A photo frame is constructed from two 3.0 mm sheets of polycarbonate. Each sheet measures 28 cm by 22cm.What is the mass of the photo frame?
October 7, 2007
1.how do you calculate the specific heat of a metallic element if 314 joules of energy are needed to raise the temperature of a 50.0 g sample from 25.0 degrees c to 50.0 degrees c. 2. how do you propose a method for determining the specific heat for a metal like sodium which ...
October 2, 2007
can some one pleasee help me!!!
The molecular structures of two penicillin-like compounds, A and B. in the compound A the C-C-N ring is intentionally bold, as is the C-C-C-C-N ring in compound B. By comparing these structures assess which of A and B, might be (i) more active than penicillin ...
June 30, 2007
1 atom of hydrogen has a mass of 2.6 x 10 power neg 21g.find the mass of 6000 atoms? 2.6 x 10 power neg 21 = 2.6 x 10^-21 6000 = .6 x 10^4 Multiply the two terms. When multiplying exponents, you add the powers. I hope this helps. Thanks for asking.
June 26, 2007
number of films seen by a group of people during the past year No of films seen 0 1 2 3 4 5 6 7 8 No of people 23 12 9 6 3 4 2 0 1 What percentage of people had seen more than 4 films during the year? would it be 10/60 = 0.1666 x 100 = 16.6% is this right???
June 7, 2007
In what ways did each of the following contribute to the growth of democracy between 1800 and 1840? a. State constitution b. Charles River Bridge v. Warren Bridge decision c. Changes in political party procedures d. actions taken by Jackson himself ccccc??? Do you know any ...
November 15, 2006